Compilare: user.cpp: In function ‘void solve(int, int)’: user.cpp:124:67: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] dp[nod][nodeColor][fatherColor] = (net.maxFlow () + 1 == v[nod].size ()); ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:142:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("design.out", "w", stdout); ^ user.cpp:142:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:144:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &N, &K); ^ user.cpp:148:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &L); ^ user.cpp:150:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &x), f[i][x - 1] ++; ^ user.cpp:152:45: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &x), v[i].push_back (x); ^