#include<cstdio>
#include<cstring>
#include<cstdlib>
#include<algorithm>
#include<functional>
#include<iostream>
#include<cmath>
#include<cctype>
#include<ctime>
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 RepD(i,n) for(int i=n;i>=0;i--)
#define Forp(x) for(int p=pre[x];p;p=next[p])
#define Lson (x<<1)
#define Rson ((x<<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 (100000007)
#define MAXN (300000+10)
long long mul(long long a,long long b){return (a*b)%F;}
long long add(long long a,long long b){return (a+b)%F;}
long long sub(long long a,long long b){return (a-b+(a-b)/F*F+F)%F;}
typedef long long ll;
class bingchaji
{
public:
int father[MAXN],n,cnt;
void mem(int _n)
{
n=cnt=_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)
{
x=getfather(x);
y=getfather(y);
if (x^y) {
--cnt;
father[x]=y;
}
}
bool same(int x,int y)
{
return getfather(x)==getfather(y);
}
}S;
const int N=300000,B=sqrt(300000);
int opt[MAXN],a[MAXN],mn[MAXN],ans[MAXN];
int main()
{
// freopen("bzoj4320.in","r",stdin);
// freopen(".out","w",stdout);
int n;
scanf("%d\n",&n);
S.mem(N+1); MEMI(mn) MEMI(ans)
For(i,N) S.father[i]=i+1;
For(i,n) {
char c;int p;
scanf("%c %d\n",&c,&p);
opt[i]=c-'A';a[i]=p;
if (c=='A') {
S.father[p]=p;
For(j,B) mn[j]=min(mn[j],p%j);
}else {
if (p<=B) ans[i]=mn[a[i]];
}
}
ForD(i,n) {
if (!opt[i]) {
S.father[a[i]]=a[i]+1;
} else {
if (a[i]>B) {
ans[i]=S.getfather(1)%a[i];
for(int j=a[i];j<=N;j+=a[i]) {
int p=S.getfather(j);
if (p<=N) ans[i]=min(ans[i],p%a[i]);
}
}
}
}
For(i,n) if (opt[i]) printf("%d\n",ans[i]);
return 0;
}