Compilare: user.cpp: In function ‘int main(int, const char**)’: user.cpp:33:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < d.size(); ++i) ^ user.cpp:46:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < d.size(); ++i) ^ user.cpp:51:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < d.size(); ++i) ^ user.cpp:53:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < d.size(); ++j) ^ user.cpp:17:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("numere6.in", "r", stdin); ^ user.cpp:18:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("numere6.out", "w", stdout); ^ user.cpp:22:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &s); ^