Compilare: main.cpp: In function 'int solve()': main.cpp:38:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<m.size();i++) ~^~~~~~~~~ main.cpp:40:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(apm.size()>=N-1) break; ~~~~~~~~~~^~~~~ main.cpp: In function 'int main()': main.cpp:71:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ind<m.size() and c>m[ind].cost) ind++; ~~~^~~~~~~~~