Compilare: main.cpp: In function 'int main()': main.cpp:72:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("trenuri.in", "r", stdin); ^ main.cpp:73:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("trenuri.out", "w", stdout); ^ main.cpp:75:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &m, &B); ^ main.cpp:77:75: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d%d", &E[i].x, &E[i].y, &E[i].c, &E[i].t1, &E[i].t2); ^