Compilare: main.cpp: In function 'int main()': main.cpp:65:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(rez.size()==k) ~~~~~~~~~~^~~ main.cpp:6:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("nambartiori.in","r",stdin); ^ main.cpp:7:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("nambartiori.out","w",stdout); ^