Compilare: main.cpp: In function 'int dfs(int)': main.cpp:16:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<graph_orientat[start_node].size();i++) ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:30:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:69:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<afisare.size();i++) ~^~~~~~~~~~~~~~~ main.cpp:34:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("beararii2.in", "r", stdin); ^ main.cpp:35:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("berarii2.out", "w", stdout); ^ main.cpp:38:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &m, &p); ^ main.cpp:42:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &a, &b); ^ main.cpp:48:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &berarie); ^