Compilare: main.cpp: In function 'void build(int)': main.cpp:18:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int p=0;p<muchii[i].size();p++) ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int dfs(int, int)': main.cpp:37:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(pt[nod]<muchii[nod].size()) ~~~~~~~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'bool flux()': main.cpp:67:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int p=0;p<muchii[nod].size();p++) ~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:152:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ans==lft.size()) ~~~^~~~~~~~~~~~