Compilare: main.cpp: In function 'void dfs(int)': main.cpp:13:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[nod].size();i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'void solve(int, int, int&)': main.cpp:41:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[nod].size();i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int calc(int, int, int)': main.cpp:54:24: warning: unused variable 'nou' [-Wunused-variable] int s[4]={0,0,0,0},nou; ^~~