Compilare: main.cpp: In function 'void solve(int)': main.cpp:15:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'void build_lant(int, int)': main.cpp:34:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:111:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=0;k<v[nod1].size();k++) ~^~~~~~~~~~~~~~~ main.cpp:114:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=0;k<v[nod2].size();k++) ~^~~~~~~~~~~~~~~