Accepted
/in/foo.cc: In function 'int main()': /in/foo.cc:11:18: warning: unused variable 'sum' [-Wunused-variable] int n, i, j, k, sum, m; ^~~
/in/foo.cc: In function 'int main()': /in/foo.cc:11:18: warning: unused variable 'sum' [-Wunused-variable] int n, i, j, k, sum, m; ^~~