Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:35:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[nod].size (); ++i) { ^ user.cpp: In function ‘void dfsInv(int)’: user.cpp:48:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < vinv[nod].size (); ++i) { ^ user.cpp: In function ‘void dag()’: user.cpp:79:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[nod].size (); ++i) { ^ user.cpp: In function ‘void calcDist()’: user.cpp:102:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < dinv[nod].size (); ++i) { ^ user.cpp: In function ‘void rezolva()’: user.cpp:129:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < cap[dmax].size (); ++i) { ^ user.cpp:133:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < d[nod].size (); ++j) { ^ user.cpp:152:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < sol.size (); ++i) ^ user.cpp: In function ‘void read()’: user.cpp:24:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d", &N, &M); ^ user.cpp:26:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d", &x, &y); ^ user.cpp: In function ‘int main()’: user.cpp:158:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("drumuri5.in", "r", stdin); ^ user.cpp:159:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("drumuri5.out", "w", stdout); ^