/in/foo.cc: In function 'int main()':
/in/foo.cc:8:4: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
    for(int i=3;i<=n;i++)
    ^~~
/in/foo.cc:10:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
     cout<<a[n];
     ^~~~