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- #include <stdio.h>
- #include <stdlib.h>
- #define sz(a) sizeof(a)
- typedef struct rec{
- int t;
- char* p;
- }rec;
- int p=0,k=0;
- rec q[100000];
- void push(rec r){ q[k++]=r; }
- int pop(){
- printf("%s ",q[p].p);
- return q[p++].t;
- }
- int main()
- {
- int n;
- scanf("%d",&n);
- char c;
- int t;
- for(int i=0;i<n;i++){
- scanf("%c",&c);
- if(c=='a'){
- char* p=(char*)malloc(sz(char)*16);
- rec r;
- scanf("%d",&t);
- scanf("%s",p);
- r.t=t;
- r.p=p;
- push(r);
- }
- else if(c=='r'){
- scanf("%d",&t);
- printf("%d\n",t-pop());
- }
- else{ i--; continue; }
- }
- }
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