Compilare: main.cpp: In function 'void formRoute(int, int)': main.cpp:75:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<graph[node].size(); ++i){ ~^~~~~~~~~~~~~~~~~~~ main.cpp:86:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<graph[node].size(); ++i){ ~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void dfs(int, int, int)': main.cpp:97:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<graph[node].size(); ++i) ~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:20:40: 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:21:42: 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:22:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &T); ^ main.cpp:24:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &N, &M); ^ main.cpp:32:40: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &x, &y, &z); ^