Compilare: user.cpp: In function ‘void solve(std::vector<int>&)’: user.cpp:14:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1, nr0 = 0, nr1 = 0; i <= lst.size(); ++i) { ^ user.cpp: In function ‘int main()’: user.cpp:58:51: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int s0 = 0; s0 <= (lst[k].size() >> 1); ++s0) ^ user.cpp:36:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pitmutare.in", "r", stdin); ^ user.cpp:37:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pitmutare.out", "w", stdout); ^ user.cpp:40:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &s); ^ user.cpp:44:58: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &prm[k][i]), oki[k][prm[k][i]] = true; ^