Accepted
/in/foo.cc: In function 'int main()':
/in/foo.cc:97:6: warning: unused variable 'sum' [-Wunused-variable]
int sum=0;
^~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:97:6: warning: unused variable 'sum' [-Wunused-variable]
int sum=0;
^~~
