Compilare: main.cpp: In function 'void DFS(short int, short int, short int, short int)': main.cpp:18:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<edge[node1].size(); i++){ ~^~~~~~~~~~~~~~~~~~~ main.cpp:22:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<edge[node2].size(); j++){ ~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:58:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<edge[i].size(); j++){ ~^~~~~~~~~~~~~~~ main.cpp:45:15: warning: unused variable 'parent' [-Wunused-variable] short int parent[V]; ^~~~~~