Compilare: main.cpp: In function 'int main()': main.cpp:23:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (s.size() < q && j < n) { ~~~~~~~~~^~~ main.cpp:28:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (s.size() >= p) { ~~~~~~~~~^~~~ main.cpp:9:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("lautari.in", "r", stdin); ^ 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("lautari.out", "w", stdout); ^