小鸡腿U T7 NEERC2011

原创

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[TOC]
题目：https://icpcarchive.ecs.baylor.edu/index.php?option=com_onlinejudge&Itemid=8&category=527

ASCII Area

#include<cstdio>
#include<cstring>
#include<cstdlib>
#include<algorithm>
#include<functional>
#include<iostream>
#include<cmath>
#include<cctype>
#include<ctime>
#include<iomanip> 
#include<vector>
#include<string>
#include<queue>
#include<stack>
#include<map>
#include<sstream>
using namespace std;
#define For(i,n) for(int i=1;i<=n;i++)
#define Fork(i,k,n) for(int i=k;i<=n;i++)
#define Rep(i,n) for(int i=0;i<n;i++)
#define ForD(i,n) for(int i=n;i;i--)
#define ForkD(i,k,n) for(int i=n;i>=k;i--)
#define RepD(i,n) for(int i=n;i>=0;i--)
#define Forp(x) for(int p=Pre[x];p;p=Next[p])
#define Forpiter(x) for(int &p=iter[x];p;p=Next[p])  
#define Lson (o<<1)
#define Rson ((o<<1)+1)
#define MEM(a) memset(a,0,sizeof(a));
#define MEMI(a) memset(a,127,sizeof(a));
#define MEMi(a) memset(a,128,sizeof(a));
#define INF (2139062143)
#define F (1000000007)
#define pb push_back
#define mp make_pair 
#define fi first
#define se second
#define vi vector<int> 
#define pi pair<int,int>
#define SI(a) ((a).size())
#define Pr(kcase,ans) printf("Case #%d: %I64d\n",kcase,ans);
#define PRi(a,n) For(i,n-1) cout<<a[i]<<' '; cout<<a[n]<<endl;
#define PRi2D(a,n,m) For(i,n) { \
                        For(j,m-1) cout<<a[i][j]<<' ';\
                        cout<<a[i][m]<<endl; \
                        } 
#pragma comment(linker, "/STACK:102400000,102400000")
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
ll mul(ll a,ll b){return (a*b)%F;}
ll add(ll a,ll b){return (a+b)%F;}
ll sub(ll a,ll b){return ((a-b)%F+F)%F;}
void upd(ll &a,ll b){a=(a%F+b%F)%F;}
int read()
{
    int x=0,f=1; char ch=getchar();
    while(!isdigit(ch)) {if (ch=='-') f=-1; ch=getchar();}
    while(isdigit(ch)) { x=x*10+ch-'0'; ch=getchar();}
    return x*f;
} 
char s[1000][1000];
int main()
{
//  freopen("A.in","r",stdin);
//  freopen(".out","w",stdout);
    int n,m; 
    while(cin>>n>>m) {
        Rep(i,n) {
            scanf("%s",s[i]);
        }       
        int t=0,b=0;
        Rep(i,n) Rep(j,m) if (s[i][j]!='.') t++;
        Rep(i,n) {
            bool f=0;
            Rep(j,m) if (s[i][j]!='.') f^=1; else b+=f;
        }
        cout<<b+t/2<<endl;
    }


    return 0;
}

Binary Encoding

#include<cstdio>
#include<cstring>
#include<cstdlib>
#include<algorithm>
#include<functional>
#include<iostream>
#include<cmath>
#include<cctype>
#include<ctime>
#include<iomanip> 
#include<vector>
#include<string>
#include<queue>
#include<stack>
#include<map>
#include<sstream>
using namespace std;
#define For(i,n) for(int i=1;i<=n;i++)
#define Fork(i,k,n) for(int i=k;i<=n;i++)
#define Rep(i,n) for(int i=0;i<n;i++)
#define ForD(i,n) for(int i=n;i;i--)
#define ForkD(i,k,n) for(int i=n;i>=k;i--)
#define RepD(i,n) for(int i=n;i>=0;i--)
#define Forp(x) for(int p=Pre[x];p;p=Next[p])
#define Forpiter(x) for(int &p=iter[x];p;p=Next[p])  
#define Lson (o<<1)
#define Rson ((o<<1)+1)
#define MEM(a) memset(a,0,sizeof(a));
#define MEMI(a) memset(a,127,sizeof(a));
#define MEMi(a) memset(a,128,sizeof(a));
#define INF (2139062143)
#define F (1000000007)
#define pb push_back
#define mp make_pair 
#define fi first
#define se second
#define vi vector<int> 
#define pi pair<int,int>
#define SI(a) ((a).size())
#define Pr(kcase,ans) printf("Case #%d: %I64d\n",kcase,ans);
#define PRi(a,n) For(i,n-1) cout<<a[i]<<' '; cout<<a[n]<<endl;
#define PRi2D(a,n,m) For(i,n) { \
                        For(j,m-1) cout<<a[i][j]<<' ';\
                        cout<<a[i][m]<<endl; \
                        } 
#pragma comment(linker, "/STACK:102400000,102400000")
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
ll mul(ll a,ll b){return (a*b)%F;}
ll add(ll a,ll b){return (a+b)%F;}
ll sub(ll a,ll b){return ((a-b)%F+F)%F;}
void upd(ll &a,ll b){a=(a%F+b%F)%F;}
int read()
{
    int x=0,f=1; char ch=getchar();
    while(!isdigit(ch)) {if (ch=='-') f=-1; ch=getchar();}
    while(isdigit(ch)) { x=x*10+ch-'0'; ch=getchar();}
    return x*f;
} 
void prit(int n,int l) {
    if (!l) return;
    prit(n/2,l-1);
    printf("%d",n&1);
}
int n; 
int main()
{
//  freopen("B.in","r",stdin);
//  freopen(".out","w",stdout);
    while(cin>>n) {
        int m=1;
        while((1<<m)<n) ++m;
        int p=(1<<m)-n;
        Rep(i,1<<m) {
            if (p) prit(i/2,m-1),p--,i++;
            else prit(i,m);
            puts("");
        }

    }


    return 0;
}

Dictionary Size

#include<cstdio>
#include<cstring>
#include<cstdlib>
#include<algorithm>
#include<functional>
#include<iostream>
#include<cmath>
#include<cctype>
#include<ctime>
#include<iomanip> 
#include<vector>
#include<string>
#include<queue>
#include<stack>
#include<map>
#include<sstream>
using namespace std;
#define For(i,n) for(int i=1;i<=n;i++)
#define Fork(i,k,n) for(int i=k;i<=n;i++)
#define Rep(i,n) for(int i=0;i<n;i++)
#define ForD(i,n) for(int i=n;i;i--)
#define ForkD(i,k,n) for(int i=n;i>=k;i--)
#define RepD(i,n) for(int i=n;i>=0;i--)
#define Forp(x) for(int p=Pre[x];p;p=Next[p])
#define Forpiter(x) for(int &p=iter[x];p;p=Next[p])  
#define Lson (o<<1)
#define Rson ((o<<1)+1)
#define MEM(a) memset(a,0,sizeof(a));
#define MEMI(a) memset(a,127,sizeof(a));
#define MEMi(a) memset(a,128,sizeof(a));
#define INF (2139062143)
#define F (1000000007)
#define pb push_back
#define mp make_pair 
#define fi first
#define se second
#define vi vector<int> 
#define pi pair<int,int>
#define SI(a) ((a).size())
#define Pr(kcase,ans) printf("Case #%d: %I64d\n",kcase,ans);
#define PRi(a,n) For(i,n-1) cout<<a[i]<<' '; cout<<a[n]<<endl;
#define PRi2D(a,n,m) For(i,n) { \
                        For(j,m-1) cout<<a[i][j]<<' ';\
                        cout<<a[i][m]<<endl; \
                        } 
#pragma comment(linker, "/STACK:102400000,102400000")
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
ll mul(ll a,ll b){return (a*b)%F;}
ll add(ll a,ll b){return (a+b)%F;}
ll sub(ll a,ll b){return ((a-b)%F+F)%F;}
void upd(ll &a,ll b){a=(a%F+b%F)%F;}
int read()
{
    int x=0,f=1; char ch=getchar();
    while(!isdigit(ch)) {if (ch=='-') f=-1; ch=getchar();}
    while(isdigit(ch)) { x=x*10+ch-'0'; ch=getchar();}
    return x*f;
} 
#define MAXNode (100000*4+10)
#define Sigma_size (26)
int a[Sigma_size],b[Sigma_size];
class Trie
{
public:
    int ch[MAXNode][Sigma_size];
    int v[MAXNode],siz;
    Trie(int _siz=0):siz(_siz){}
    void mem(int _siz=0){siz=_siz; }
    int idx(char c){return c-'a';}
    void insert(char *s,int *t,int val=1)
    {
        int u=0,n=strlen(s);
        Rep(i,n)
        {
            int c=idx(s[i]);
            if (!ch[u][c])
            {
                ++siz;
                MEM(ch[siz]);v[siz]=0;
                ch[u][c]=siz;
                if (i) t[c]++;
            }
            u=ch[u][c];
        }
        v[u]=val;
    }
}T,rT;
int n; 
char s[44];
int main()
{
//  freopen("D.in","r",stdin);
//  freopen(".out","w",stdout);
    while(scanf("%d",&n)!=EOF) {
        T.mem();rT.mem(); MEM(a) MEM(b)
        For(i,n) {
            scanf("%s",s);
            T.insert(s,a);
            reverse(s,s+strlen(s));
            rT.insert(s,b);
        }
        ll ans=(ll)T.siz*rT.siz;
        Rep(i,Sigma_size) ans-=(ll)a[i]*b[i];
        Rep(i,Sigma_size) if (T.v[T.ch[0][i]]) ans++;
        printf("%lld\n",ans);
    }

    return 0;
}

Eve

#include<cstdio>
#include<cstring>
#include<cstdlib>
#include<algorithm>
#include<functional>
#include<iostream>
#include<cmath>
#include<cctype>
#include<ctime>
#include<iomanip> 
#include<vector>
#include<string>
#include<queue>
#include<stack>
#include<map>
#include<sstream>
using namespace std;
#define For(i,n) for(int i=1;i<=n;i++)
#define Fork(i,k,n) for(int i=k;i<=n;i++)
#define Rep(i,n) for(int i=0;i<n;i++)
#define ForD(i,n) for(int i=n;i;i--)
#define ForkD(i,k,n) for(int i=n;i>=k;i--)
#define RepD(i,n) for(int i=n;i>=0;i--)
#define Forp(x) for(int p=Pre[x];p;p=Next[p])
#define Forpiter(x) for(int &p=iter[x];p;p=Next[p])  
#define Lson (o<<1)
#define Rson ((o<<1)+1)
#define MEM(a) memset(a,0,sizeof(a));
#define MEMI(a) memset(a,127,sizeof(a));
#define MEMi(a) memset(a,128,sizeof(a));
#define INF (2139062143)
#define F (1000000007)
#define pb push_back
#define mp make_pair 
#define fi first
#define se second
#define vi vector<int> 
#define pi pair<int,int>
#define SI(a) ((a).size())
#define Pr(kcase,ans) printf("Case #%d: %I64d\n",kcase,ans);
#define PRi(a,n) For(i,n-1) cout<<a[i]<<' '; cout<<a[n]<<endl;
#define PRi2D(a,n,m) For(i,n) { \
                        For(j,m-1) cout<<a[i][j]<<' ';\
                        cout<<a[i][m]<<endl; \
                        } 
#pragma comment(linker, "/STACK:102400000,102400000")
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
ll mul(ll a,ll b){return (a*b)%F;}
ll add(ll a,ll b){return (a+b)%F;}
ll sub(ll a,ll b){return ((a-b)%F+F)%F;}
void upd(ll &a,ll b){a=(a%F+b%F)%F;}
int read()
{
    int x=0,f=1; char ch=getchar();
    while(!isdigit(ch)) {if (ch=='-') f=-1; ch=getchar();}
    while(isdigit(ch)) { x=x*10+ch-'0'; ch=getchar();}
    return x*f;
} 
#define MAXN (300000+10)
class bingchaji
{
public:
    int father[MAXN],n;
    void mem(int _n)
    {
        n=_n;
        For(i,n) father[i]=i;
    }
    int getfather(int x) 
    {
        if (father[x]==x) return x;

        return father[x]=getfather(father[x]);
    }
    void unite(int x,int y)
    {
        father[x]=getfather(father[x]);
        father[y]=getfather(father[y]);
        father[father[x]]=father[father[y]];
    }
    bool same(int x,int y)
    {
        return getfather(x)==getfather(y);
    }
}S;
int sx[MAXN],n;
bool b[MAXN];
int id[MAXN];
int main()
{
//  freopen("E.in","r",stdin);
//  freopen(".out","w",stdout);
    while(cin>>n) {
        MEM(id) MEM(b) MEM(sx) 
        For(i,n) {
            char s[2];
            scanf("%s",s);
            sx[i]=(s[0]=='F'); b[i]=1; 
        }
        int m=read();
        S.mem(n+m);
        For(i,m) {
            int p=read();
            if (p<0) b[-p]=0;
            else {
                int q; char c[2];
                scanf("%d %s",&q,c);
                if (!sx[p]) p=q;
                S.unite(++n,p); 
                sx[n]=c[0]=='F';
                b[n]=1; 
            }
        }
        int k=read();
        For(i,n) S.getfather(i);

        For(i,k) {
            int p=read(),q=read();
            id[S.getfather(p)]=q;
        }
        For(i,n) if (!id[i]) {
            id[i]=-i;
        }
        vi v;
        For(i,n) if (b[i]) {
            int q=id[S.getfather(i)];
            v.pb(q);
        }
        sort(v.begin(),v.end());
        int f=unique(v.begin(),v.end())-v.begin();
        if (f<=1) {
            puts("YES");
        } else {
            int p=0,q=0;
            Rep(i,f) if (v[i]<0) ++p; 
            else ++q;
            if (q>=2) puts("NO"); 
            else puts("POSSIBLY");
        }
    }
    return 0;
}

GCD Guessing Game

#include<cstdio>
#include<cstring>
#include<cstdlib>
#include<algorithm>
#include<functional>
#include<iostream>
#include<cmath>
#include<cctype>
#include<ctime>
#include<iomanip> 
#include<vector>
#include<string>
#include<queue>
#include<stack>
#include<map>
#include<sstream>
using namespace std;
#define For(i,n) for(int i=1;i<=n;i++)
#define Fork(i,k,n) for(int i=k;i<=n;i++)
#define Rep(i,n) for(int i=0;i<n;i++)
#define ForD(i,n) for(int i=n;i;i--)
#define ForkD(i,k,n) for(int i=n;i>=k;i--)
#define RepD(i,n) for(int i=n;i>=0;i--)
#define Forp(x) for(int p=Pre[x];p;p=Next[p])
#define Forpiter(x) for(int &p=iter[x];p;p=Next[p])  
#define Lson (o<<1)
#define Rson ((o<<1)+1)
#define MEM(a) memset(a,0,sizeof(a));
#define MEMI(a) memset(a,127,sizeof(a));
#define MEMi(a) memset(a,128,sizeof(a));
#define INF (2139062143)
#define F (1000000007)
#define pb push_back
#define mp make_pair 
#define fi first
#define se second
#define vi vector<int> 
#define pi pair<int,int>
#define SI(a) ((a).size())
#define Pr(kcase,ans) printf("Case #%d: %I64d\n",kcase,ans);
#define PRi(a,n) For(i,n-1) cout<<a[i]<<' '; cout<<a[n]<<endl;
#define PRi2D(a,n,m) For(i,n) { \
                        For(j,m-1) cout<<a[i][j]<<' ';\
                        cout<<a[i][m]<<endl; \
                        } 
#pragma comment(linker, "/STACK:102400000,102400000")
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
ll mul(ll a,ll b){return (a*b)%F;}
ll add(ll a,ll b){return (a+b)%F;}
ll sub(ll a,ll b){return ((a-b)%F+F)%F;}
void upd(ll &a,ll b){a=(a%F+b%F)%F;}
int read()
{
    int x=0,f=1; char ch=getchar();
    while(!isdigit(ch)) {if (ch=='-') f=-1; ch=getchar();}
    while(isdigit(ch)) { x=x*10+ch-'0'; ch=getchar();}
    return x*f;
} 
#define MAXN (10010)
int p[MAXN],tot;
bool b[MAXN]={0};
void make_prime(int n)
{
    tot=0;
    Fork(i,2,n)
    {
        if (!b[i]) p[++tot]=i;
        For(j,tot)
        {
            if (i*p[j]>n) break;
            b[i*p[j]]=1;
            if (i%p[j]==0) break;  
        }
    }
}
int main()
{
//  freopen("D.in","r",stdin);
//  freopen(".out","w",stdout);
    int n;
    make_prime(10000);
    while(cin>>n) {
        int r=upper_bound(p,p+1+tot,n)-(p+1);
        int l=1,ans=0;
        while(l<=r) {
            ll a=p[r--];
            while(a*p[l]<=n) a*=p[l++];
            ans++;
        }
        cout<<ans<<endl;
    }


    return 0;
}

Kingdom Roadmap

#include<cstdio>
#include<cstring>
#include<cstdlib>
#include<algorithm>
#include<functional>
#include<iostream>
#include<cmath>
#include<cctype>
#include<ctime>
#include<iomanip> 
#include<vector>
#include<string>
#include<queue>
#include<stack>
#include<map>
#include<sstream>
using namespace std;
#define For(i,n) for(int i=1;i<=n;i++)
#define Fork(i,k,n) for(int i=k;i<=n;i++)
#define Rep(i,n) for(int i=0;i<n;i++)
#define ForD(i,n) for(int i=n;i;i--)
#define ForkD(i,k,n) for(int i=n;i>=k;i--)
#define RepD(i,n) for(int i=n;i>=0;i--)
#define Forp(x) for(int p=Pre[x];p;p=Next[p])
#define Forpiter(x) for(int &p=iter[x];p;p=Next[p])  
#define Lson (o<<1)
#define Rson ((o<<1)+1)
#define MEM(a) memset(a,0,sizeof(a));
#define MEMI(a) memset(a,127,sizeof(a));
#define MEMi(a) memset(a,128,sizeof(a));
#define INF (2139062143)
#define F (1000000007)
#define pb push_back
#define mp make_pair 
#define fi first
#define se second
#define vi vector<int> 
#define pi pair<int,int>
#define SI(a) ((a).size())
#define Pr(kcase,ans) printf("Case #%d: %I64d\n",kcase,ans);
#define PRi(a,n) For(i,n-1) cout<<a[i]<<' '; cout<<a[n]<<endl;
#define PRi2D(a,n,m) For(i,n) { \
                        For(j,m-1) cout<<a[i][j]<<' ';\
                        cout<<a[i][m]<<endl; \
                        } 
#pragma comment(linker, "/STACK:102400000,102400000")
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
ll mul(ll a,ll b){return (a*b)%F;}
ll add(ll a,ll b){return (a+b)%F;}
ll sub(ll a,ll b){return ((a-b)%F+F)%F;}
void upd(ll &a,ll b){a=(a%F+b%F)%F;}
int read()
{
    int x=0,f=1; char ch=getchar();
    while(!isdigit(ch)) {if (ch=='-') f=-1; ch=getchar();}
    while(isdigit(ch)) { x=x*10+ch-'0'; ch=getchar();}
    return x*f;
} 
#define MAXN (100010+10)
int n,d[MAXN],lef;
vi edge[MAXN];
int t[MAXN],ti=0;
void dfs6(int x,int f) {
    if (d[x]==1) t[ti++]=x;
    Rep(j,SI(edge[x]) ) {
        int v=edge[x][j];
        if (v^f) {
            dfs6(v,x);
        }
    }
}
int main()
{
//  freopen("K.in","r",stdin);
//  freopen(".out","w",stdout);
    while(cin>>n) {
        if (n==2) {
            int u=read(),v=read();
            puts("1\n1 2"); continue;
        } 
        MEM(d) lef=0; 
        For(i,n-1) {
            int u=read(),v=read();
            d[u]++,d[v]++;
            edge[u].pb(v); edge[v].pb(u);
        }

        vi v;
        For(i,n) if (d[i]==1) v.pb(i);
        int sz=SI(v);
        lef=sz;
        printf("%d\n",(sz+1)/2);
        ti=0;
        dfs6(1,0);
        if (lef%2==0) {
            Rep(i,lef/2) printf("%d %d\n",t[i],t[i+lef/2]);
        } else {
            Rep(i,1+lef/2) printf("%d %d\n",t[i],t[i+lef/2]);

        }
        For(i,n) edge[i].clear(); 
    }

    return 0;
}