foo.cc: In function 'int main()':
foo.cc:5:18: warning: unused variable 'x' [-Wunused-variable]
    5 |    long long int x,y,n,t=0;
      |                  ^
foo.cc:5:20: warning: unused variable 'y' [-Wunused-variable]
    5 |    long long int x,y,n,t=0;
      |                    ^
foo.cc:5:24: warning: unused variable 't' [-Wunused-variable]
    5 |    long long int x,y,n,t=0;
      |                        ^

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