Compilare: main.cpp: In function 'int Find(int, int, int)': main.cpp:34:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<=a[index].size()-1; i++) ~^~~~~~~~~~~~~~~~~~~ main.cpp:39:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (a[index][i] == a[index][i+1] && i+1 <= a[index].size()-1) ~~~~^~~~~~~~~~~~~~~~~~~~