Compilare: user.cpp: In function ‘int main()’: user.cpp:46:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j < valori[ind].size(); ++j) ^ user.cpp:64:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j < v.size(); ++j) ^ user.cpp:70:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j < v.size(); ++j) ^ user.cpp:79:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (sol = 0; sol < v.size(); ++sol) ^ user.cpp:84:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < valori[v[sol]].size(); ++i) ^ user.cpp:24:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cuburi5.in","r",stdin); ^ user.cpp:25:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cuburi5.out","w",stdout); ^ 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, &K); ^ user.cpp:35:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^