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#include <stdio.h>
#include <queue>
std::priority_queue<int>q;
char s[6];
int v;
int main(){
    int t;
    scanf("%d",&t);
    while(t--){
        scanf("%s",s);
        if(s[0] == 'T'){
            printf("%d\n",q.top());
            q.pop();
        }
        else{
            scanf("%d",&v);
            q.push(v);
        }
    }
    return 0;
}
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