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