Compilare: main.cpp: In function 'int solve(int)': main.cpp:39:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < G[nod].size(); i++ ){ ~~^~~~~~~~~~~~~~~ main.cpp:60:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < G[i].size(); j++ ){ ~~^~~~~~~~~~~~~ main.cpp:62:17: warning: unused variable 'vecin' [-Wunused-variable] int vecin = G[i][j]; ^~~~~ main.cpp: In function 'int main()': main.cpp:104:9: warning: unused variable 'ok' [-Wunused-variable] int ok = solve( st ); ^~