Compilare: user.cpp: In function ‘void solve(int)’: user.cpp:20:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<g[nod].size(); i++) ^ user.cpp: In function ‘void get_dist(int, int)’: user.cpp:37:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i<g[nod].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:62:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<g[1].size();i++) ^ user.cpp:49:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("capitala.in","r",stdin); ^ user.cpp:50:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("capitala.out","w",stdout); ^ user.cpp:52:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:54:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^