Compilare: user.cpp: In function ‘int main()’: user.cpp:34:42: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if (v[i].first == v[j].first && v[j].second >= v[i].second || (v[i].first < v[j].first && v[i].second < v[j].second)) ^ user.cpp:16:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("biathlon.in" ,"r", stdin); ^ user.cpp:17:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("biathlon.out" ,"w", stdout); ^ user.cpp:19:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:22:50: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &v[i].first, &v[i].second); ^