Compilare: main.cpp: In function 'int main()': main.cpp:18:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < n; i++){ ~~^~~ main.cpp:21:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = i + 1; j <= n; j += zeros(j)){ ~~^~~~ main.cpp:25:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int q = 0; q < m; q++){ ~~^~~ main.cpp:28:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int x = u; x <= n; x += zeros(x)){ ~~^~~~