Compilare: main.cpp: In function 'void DFS(int, int, int)': main.cpp:17:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < L[nod].size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void dfs(int, int, int, int, bool&)': main.cpp:40:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < L[nod].size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void Solve(int, int, int, bool&)': main.cpp:64:9: warning: unused variable 'i' [-Wunused-variable] int i,a,b,c; ^ main.cpp:64:11: warning: unused variable 'a' [-Wunused-variable] int i,a,b,c; ^ main.cpp:64:13: warning: unused variable 'b' [-Wunused-variable] int i,a,b,c; ^ main.cpp:64:15: warning: unused variable 'c' [-Wunused-variable] int i,a,b,c; ^