foo.cc: In function 'int main()':
foo.cc:53:24: error: 'm' was not declared in this scope
   53 |         for(int i=1;i<=m;i++)
      |                        ^
foo.cc:55:29: error: 'v' was not declared in this scope
   55 |                 scanf("%d",&v[i]);
      |                             ^

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