Compilare: main.cpp: In function 'void comb(int, int, int)': main.cpp:148:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < g[b].size() && j < g[c].size()) ~~^~~~~~~~~~~~~ main.cpp:148:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < g[b].size() && j < g[c].size()) ~~^~~~~~~~~~~~~ main.cpp:163:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < g[b].size()) ~~^~~~~~~~~~~~~ main.cpp:169:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j < g[c].size()) ~~^~~~~~~~~~~~~