Compilare: main.cpp: In function 'int main()': main.cpp:42:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i < prime.size() && 1LL*prime[i]*prime[i] <= aux;i++){ ~~^~~~~~~~~~~~~~ main.cpp:52:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i < prime.size() && 1LL*prime[i]*prime[i] <= aux;i++){ ~~^~~~~~~~~~~~~~ main.cpp:62:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i < prime.size() && 1LL*prime[i]*prime[i] <= aux;i++){ ~~^~~~~~~~~~~~~~ main.cpp:35:9: warning: unused variable 't' [-Wunused-variable] int t,i,j; ^ main.cpp:35:13: warning: unused variable 'j' [-Wunused-variable] int t,i,j; ^