Compilare: main.cpp: In function 'void precalc()': main.cpp:35:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j < v.size() && v[j] * v[j] <= x) { ~~^~~~~~~~~~ main.cpp:36:51: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(x % v[j] == 0 && nr[x / v[j]].size() + 1 > mx) { ~~~~~~~~~~~~~~~~~~~~~~~~^~~~ main.cpp:45:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j < v.size() && v[j] * v[j] <= x) { ~~^~~~~~~~~~ main.cpp:46:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(x % v[j] == 0 && nr[x / v[j]].size() > mx) { ~~~~~~~~~~~~~~~~~~~~^~~~ main.cpp: In function 'int main()': main.cpp:68:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(nr[i].size() > mx) { ~~~~~~~~~~~~~^~~~ main.cpp:72:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] } else if(mx == nr[i].size()) { ~~~^~~~~~~~~~~~~~~