foo.cc: In function 'int main()':
foo.cc:20:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for(i=2;i<=a[0];i++)
     ^~~
foo.cc:26:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
  cout<<ans;
  ^~~~

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