#include <iostream> using namespace std; int main() { int n = 1; int cnt = 0; int a=1,b=1; while (n <= 1000) { if (a > 20) { a = 1; } if (b > 30) { b = 1; } if (a == b ) { cnt++; } a++,b++,n++; } cout<<cnt; return 0; }