Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:49:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g[n].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:64:38: warning: format ‘%s’ expects argument of type ‘char*’, but argument 4 has type ‘char (*)[10]’ [-Wformat=] scanf("%d%d%s", &a, &b, &cost); ^ user.cpp:58:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ninjago.in", "r", stdin); ^ user.cpp:59:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ningajo.out", "w", stdout); ^ user.cpp:60:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &cer, &n, &m); ^ user.cpp:64:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%s", &a, &b, &cost); ^