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  1. //21-11-19
  2. #include<bits/stdc++.h>
  3.  
  4. #define scl(n)   scanf("%d",&n)
  5. #define pb    push_back
  6. #define For(i,n)     for(int i=0;i<n;i++)
  7. using namespace std;
  8.  
  9. int n,q;
  10. vector<int>v;
  11. int main()
  12. {
  13.     scl(n);
  14.     scl(q);
  15.     For(i,n)
  16.     {
  17.         int a;
  18.         scl(a);
  19.         v.pb(a);
  20.     }
  21.     For(i,q)
  22.     {
  23.         int typ;
  24.         scl(typ);
  25.         if(typ==1)
  26.         {
  27.             int k,x;
  28.             scl(k);
  29.             scl(x);
  30.             v.insert(v.begin()+k-1, x);
  31.         }
  32.         if(typ==2)
  33.         {
  34.             int k;
  35.             scl(k);
  36.             v.erase(v.begin()+k-1);
  37.         }
  38.         if(typ==3)
  39.         {
  40.             int k;
  41.             scl(k);
  42.             printf("%d\n",v[k-1]);
  43.         }
  44.     }
  45.     return 0;
  46. }
  47.  
  48.  
Success #stdin #stdout 0s 4340KB
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/Xqx75z
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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