Compilare: main.cpp: In function 'int main()': main.cpp:27:14: warning: unused variable 'cnt' [-Wunused-variable] long long cnt = 0, cnt2 = 0; ^~~ main.cpp:27:23: warning: unused variable 'cnt2' [-Wunused-variable] long long cnt = 0, cnt2 = 0; ^~~~ main.cpp:24:12: warning: unused variable 'nrPerechiNonBune' [-Wunused-variable] long long nrPerechiNonBune = 0; ^~~~~~~~~~~~~~~~ main.cpp:13:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pairs.in", "r", stdin); ^ main.cpp:14:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pairs.out", "w", stdout); ^