Compilare: main.cpp: In function 'void dfs(int)': main.cpp:22:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<v[nod].size(); i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'void solve4()': main.cpp:37:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<sol.size(); i++) ~^~~~~~~~~~~ main.cpp: In function 'void dfs1(int, int)': main.cpp:48:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<v[nod].size(); i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'void solve3()': main.cpp:61:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<sol.size(); i++) ~^~~~~~~~~~~ main.cpp: In function 'void DFS(int)': main.cpp:143:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<v[nod].size() && ok; i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'void solve1()': main.cpp:152:10: warning: unused variable 'found' [-Wunused-variable] bool found = false; ^~~~~ main.cpp:156:9: warning: unused variable 'T1' [-Wunused-variable] int T1, T2; ^~ main.cpp:156:13: warning: unused variable 'T2' [-Wunused-variable] int T1, T2; ^~