Compilare: main.cpp: In function 'int main()': main.cpp:36:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < p.size() && p[j] <= low[i] && 1LL * i * p[j] <= n; j++) ~~^~~~~~~~~~ main.cpp:42:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; 1LL * p[i] * p[i] <= n && i < p.size(); i++) { ~~^~~~~~~~~~