Compilare: main.cpp: In function 'int main()': main.cpp:55:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v.size();i++) ~^~~~~~~~~ main.cpp:57:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=i+1;j<v.size();j++) ~^~~~~~~~~ main.cpp:59:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=j+1;k<v.size();k++) ~^~~~~~~~~