Compilare: main.cpp: In function 'void solve(int, pct, pct, pct, int)': main.cpp:21:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] { if(v[ok].size()<k) ~~~~~~~~~~~~^~ main.cpp:25:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(v[ok].size()>=k && !stanga(v[ok][v[ok].size()-2],v[ok][v[ok].size()-1],c)) ~~~~~~~~~~~~^~~