G - 01Sequence(贪心&dsu)
区间按右端点排序,每次靠右填,填的时候用dsu快速找到最近的 0 0 0。
查询的话用BIT维护即可。
每个位置最多被填一次,时间复杂度: O ( m l o g m + n l o g n ) O(mlogm+nlogn) O(mlogm+nlogn)
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
const int N=2e5+5,M=2e4+5,inf=0x3f3f3f3f,mod=1e9+7;
#define mst(a,b) memset(a,b,sizeof a)
#define PII pair<int,int>
#define x first
#define y second
#define pb emplace_back
#define SZ(a) (int)a.size()
#define rep(i,a,b) for(int i=a;i<=b;++i)
#define per(i,a,b) for(int i=a;i>=b;--i)
#define IOS ios::sync_with_stdio(false),cin.tie(0)
void Print(int *a,int n){
for(int i=1;i<n;i++)
printf("%d ",a[i]);
printf("%d\n",a[n]);
}
int n,m;
struct node{
int x,y,z;
bool operator<(const node &a)const{
return y<a.y;
}
}a[N];
struct BIT{
#define lowbit(x) x&(-x)
#define il inline
ll s[N];
int n;
il void upd(int x,int v){
while(x<=n){
s[x]+=v;x+=lowbit(x);
}return;
}
il ll que(int x){
ll ans=0;
while(x){
ans+=s[x];x-=lowbit(x);
}return ans;
}
}T;
int s[N];
int find(int x){return x==s[x]?x:s[x]=find(s[x]);}
void Init(int n){
for(int i=1;i<=n;i++) s[i]=i;
}
int ans[N];
int main(){
scanf("%d%d",&n,&m);Init(n);T.n=n;
rep(i,1,m) scanf("%d%d%d",&a[i].x,&a[i].y,&a[i].z);
sort(a+1,a+m+1);
rep(i,1,m){
ll sum=T.que(a[i].y)-T.que(a[i].x-1);
if(sum>=a[i].z) continue;
a[i].z-=sum;
for(int j=find(a[i].y);j>=a[i].x&&a[i].z;j=find(j)){
T.upd(j,1);a[i].z--;ans[j]=1;
s[j]=j-1;
}
}
rep(i,1,n) printf("%d ",ans[i]);
return 0;
}