Compilare: main.cpp: In function 'void DFS(int)': main.cpp:71:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1; i<Graph[node].size(); ++i){ ~^~~~~~~~~~~~~~~~~~~ main.cpp:84:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=1; j<Graph[k].size(); ++j) ~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:22:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("autobuze3.in", "r", stdin); ^ main.cpp:23:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("autobuze3.out", "w", stdout); ^ main.cpp:24:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &T); ^ main.cpp:27:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &N, &M); ^ main.cpp:31:40: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &x, &y, &z); ^