# include<iostream> using namespace std; int main (){ int xt,xl,count,i; xt = 1; xl = 1; count = 1; for (int i = 0;i <1000;i++){ xt++; xl++; if(xt>20) xt=1; if(xl>30) xl=1; if(xt==xl) count++; } cout<<count; return 0; }