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May 22nd, 2017
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  1. #include <iostream>
  2. #include <cstdio>
  3. #include <cstdlib>
  4. using namespace std;
  5. long int b[600000];
  6.  
  7. int main(){
  8. int i,n,op,k,min=10005,j,l,a;
  9. cin >>n;
  10. j=0;
  11. for(i=1;i<=n;i++){
  12. cin >>op;
  13. if(op==0) {j++; cin >> b[j]; if (b[j]<min) {min=b[j]; l=j;} ;}
  14. if(op==1) {if(j==l){ min=10005; for(a=1; a<j; a++){if(b[a]<min){min=b[a]; l=a;}} } j--;}
  15. if(op==2) {cout << b[j] << ' ';}
  16. if(op==3) {cout << min << ' ';}
  17. }
  18. return 0;
  19. }
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