Compilare: user.cpp: In function ‘void solve(std::vector<int>&, std::vector<int>)’: user.cpp:34:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (b.size() == n) ^ user.cpp:52:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < poz[0].size(); i++) ^ user.cpp:76:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] index<b.size() ^ user.cpp:67:7: warning: unused variable ‘current_size’ [-Wunused-variable] int current_size = b.size()*(b.size() + 1) / 2; ^ user.cpp: In function ‘int main()’: user.cpp:97:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sume.in", "r", stdin); ^ user.cpp:98:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sume.out", "w", stdout); ^ user.cpp:100:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &p); ^ user.cpp:105:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^