Compilare: main.cpp: In function 'int main()': main.cpp:14:36: warning: unused variable 'min_cost' [-Wunused-variable] int n, m, pl, cl, pc, cc, aux, min_cost = 0; ^~~~~~~~ main.cpp:18:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("padure.in", "r", stdin); ^ main.cpp:19:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("padure.out", "w", stdout); ^