Compilare: main.cpp: In function 'void DFS(int, int, int)': main.cpp:94:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Ad[nod].size(); ++i) ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void Task2()': main.cpp:116:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Ad[x].size(); ++i) ~~^~~~~~~~~~~~~~ main.cpp:119:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < Ad[y].size(); ++j) ~~^~~~~~~~~~~~~~ main.cpp: In function 'void DFS3(int, int, int, std::vector<int>&)': main.cpp:147:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Ad[nod].size(); ++i) ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void Task3()': main.cpp:169:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < V.size(); ++i) fout << V[0] << ' '; ~~^~~~~~~~~~ main.cpp: In function 'void DFS4(int, int, std::vector<int>&)': main.cpp:181:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Ad[nod].size(); ++i) ~~^~~~~~~~~~~~~~~~ main.cpp:190:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Ad[nod].size(); ++i) ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void Task4()': main.cpp:208:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < V.size(); ++i) ~~^~~~~~~~~~