Compilare: main.cpp: In function 'int main()': main.cpp:18:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v.size()-4;i++) ~^~~~~~~~~~~ main.cpp:19:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=i+1;j<v.size()-3;j++) ~^~~~~~~~~~~ main.cpp:20:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (k=j+1;k<v.size()-2;k++) ~^~~~~~~~~~~ main.cpp:21:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (l=k+1;l<v.size()-1;l++) ~^~~~~~~~~~~ main.cpp:22:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (m=l+1;m<v.size();m++) ~^~~~~~~~~ main.cpp:23:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v[i]+v[j]+v[k]+v[l]+v[m]==S)