Compilare: main.cpp: In function 'int main()': main.cpp:48:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<vec.size();i++) ~^~~~~~~~~~~ main.cpp:53:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<vec.size();i++){ ~^~~~~~~~~~~ main.cpp:34:9: warning: unused variable 't' [-Wunused-variable] int t,i,j; ^