Compilare: main.cpp: In function 'int main()': main.cpp:57:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<v[top.id].size(); i++) ~^~~~~~~~~~~~~~~~~ main.cpp:56:5: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if (top.cost <= cost[top.id]) ^ main.cpp:29:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("catun.in", "r", stdin); ^ main.cpp:30:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("catun.out", "w", stdout); ^ main.cpp:31:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &n, &m, &k); ^ main.cpp:37:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int X; scanf("%d", &X); ^ main.cpp:46:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &X, &Y, &Z); ^