/in/foo.cc: In function 'int main()':
/in/foo.cc:17:6: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
      for(int i=1;i<=a[k][0];i++)
      ^~~
/in/foo.cc:24:8: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
        cout<<f[v];
        ^~~~