10求救，必关

#include <iostream>
using namespace std;
int main() {
    int l, r;
    cin >> l >> r;
    int bas2[10001], sum = 0;
    for (int i = l; i <= r; i++) {
        int t = i;
        bas2[i] = 0;
        while (t > 0) {
            bas2[i] += t % 2;
            t /= 2;
            bas2[i] *= 10;
        }
        int sum1 = 0;
        while (bas2[i] > 0) {
            if (bas2[i] % 10 == 1) {
                sum1 += 1;
            }
            bas2[i] /= 10;
        }
        if (sum1 == 2) {
            sum += 1;
        }
    }
    cout << sum;
    return 0;
}