Compilare: main.cpp: In function 'void dfs(int, int, int)': main.cpp:20:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<a[nod].size(); i++){ ~^~~~~~~~~~~~~~ main.cpp: In function 'int dif(int, int, int, int, int, int)': main.cpp:65:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<a[nod1].size(); i++){ ~^~~~~~~~~~~~~~~ main.cpp:84:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<a[nod1].size(); i++){ ~^~~~~~~~~~~~~~~ main.cpp:103:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<a[nod1].size(); i++){ ~^~~~~~~~~~~~~~~ main.cpp:122:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<a[nod1].size(); i++){ ~^~~~~~~~~~~~~~~ main.cpp:141:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<a[nod1].size(); i++){ ~^~~~~~~~~~~~~~~ main.cpp:160:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<a[nod1].size(); i++){ ~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:199:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<cmp[i].size(); j++){ ~^~~~~~~~~~~~~~