Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:38:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[nod].size (); ++i) { ^ user.cpp: In function ‘void calcT(int)’: user.cpp:83:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[nod].size (); ++i) { ^ user.cpp: In function ‘void citire()’: user.cpp:27:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d", &N, &M); ^ user.cpp:29:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d%d", &x, &y, &d); ^ user.cpp: In function ‘void rezolva()’: user.cpp:132:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d", &x, &d); ^ user.cpp: In function ‘int main()’: user.cpp:144:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("hacker2.in", "r", stdin); ^ user.cpp:145:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("hacker2.out", "w", stdout); ^ user.cpp: In function ‘void sol(int, int, int)’: user.cpp:124:46: warning: ‘p’ may be used uninitialized in this function [-Wmaybe-uninitialized] sol (p, d - (dist[l][nod] - dist[l][p]), l); ^