foo.cc: In function 'int main()':
foo.cc:6:15: warning: unused variable 'time' [-Wunused-variable]
    6 |         int n,time,cnt,sum=0;
      |               ^~~~
foo.cc:6:20: warning: unused variable 'cnt' [-Wunused-variable]
    6 |         int n,time,cnt,sum=0;
      |                    ^~~

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