Compilare: main.cpp:6:23: warning: left shift count >= width of type [-Wshift-count-overflow] const int MOD = (1 << 32); ^~ main.cpp: In function 'int main()': main.cpp:59:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 1; j < v[i].size() && ok == true; j++) ~~^~~~~~~~~~~~~ main.cpp:80:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < v[i].size() && ok == true; j++) ~~^~~~~~~~~~~~~