Compilare: main.cpp: In function 'int main()': main.cpp:28:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (stiva.size() > ans) ~~~~~~~~~~~~~^~~~~ main.cpp:10:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("teatru.in", "r", stdin) ; ^ main.cpp:11:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("teatru.out", "w", stdout) ; ^ main.cpp:14:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &k) ; ^