Compilare: main.cpp: In function 'int main()': main.cpp:55:22: warning: format '%lld' expects argument of type 'long long int', but argument 2 has type 'int' [-Wformat=] printf("%lld\n", ans); ^ main.cpp:44:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("arb2.in", "r", stdin); ^ main.cpp:45:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("arb2.out", "w", stdout); ^ main.cpp:47:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ main.cpp:50:39: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &u, &v, &d, &c); ^