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  1. //21-11-19
  2. #include<cstdio>
  3. #include<vector>
  4. #include<cstdlib>
  5. #include<algorithm>
  6.  
  7. #define scl(n)   scanf("%d",&n)
  8. #define pb    push_back
  9. #define For(i,n)     for(int i=0;i<n;i++)
  10. using namespace std;
  11. int n,q;
  12. vector<int>v;
  13. int main()
  14. {
  15.     scl(n);
  16.     scl(q);
  17.     For(i,n)
  18.     {
  19.         int x;
  20.         scl(x);
  21.         v.pb(x);
  22.     }
  23.     For(i,q)
  24.     {
  25.         int num;
  26.         scl(num);
  27.         if(num==1)
  28.         {
  29.             int k,x;
  30.             scl(k);
  31.             scl(x);
  32.             k--;
  33.             if(k>v.size())
  34.                 continue;
  35.             if(k<v.size())
  36.                 v.insert(v.begin()+k, x);
  37.             if(k==v.size())
  38.                 v.pb(x);
  39.         }
  40.         if(num==2)
  41.         {
  42.             int k;
  43.             scl(k);
  44.             k--;
  45.             if(k>=v.size())
  46.                 continue;
  47.             v.erase(v.begin()+k);
  48.         }
  49.         if(num==3)
  50.         {
  51.             int k;
  52.             scl(k);
  53.             k--;
  54.             printf("%d\n",v[k]);
  55.         }
  56.     }
  57.     return 0;
  58. }
  59.  
  60.  
Success #stdin #stdout 0s 4188KB
comments (?)
stdin
copy 
6 10
1 2 4 8 16 32
3 4
1 1 7
3 2
2 2
2 2
3 2
1 6 666
3 6
2 1
3 1
stdout
copy 
8
1
4
666
4
https://ideone.com/EzavRI
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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