Compilare: main.cpp: In function 'void dfs(int)': main.cpp:29:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[x].size();i++) ~^~~~~~~~~~~~ main.cpp: In function 'void afisare()': main.cpp:80:40: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<int>::size_type {aka long unsigned int}' [-Wformat=] printf("%d ", sol[x].size()); ^ main.cpp:81:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<sol[x].size();j++) ~^~~~~~~~~~~~~~ main.cpp: In function 'void citire()': main.cpp:16:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n", &n, &m); ^ main.cpp:19:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n", &x, &y); ^ main.cpp: In function 'int main()': main.cpp:89:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("retele.in", "r", stdin); ^ main.cpp:90:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("retele.out", "w", stdout); ^