Compilare: main.cpp: In function 'void get()': main.cpp:29:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < dd.size(); i++) ~~^~~~~~~~~~~ main.cpp: In function 'll solve(int, int)': main.cpp:35:8: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (a == dd.size() && b != 0) return 0; ~~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:67:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = ant; i < dd.size(); i++) ~~^~~~~~~~~~~ main.cpp:85:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < ans.size(); i++) ~~^~~~~~~~~~~~ main.cpp:49:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("desc.in", "r", stdin); ^ main.cpp:50:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("desc.out", "w", stdout); ^ main.cpp:52:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld %lld", &n, &k); ^