python/TangDou/XiTi/1149.cpp

#include <bits/stdc++.h>

using namespace std;

//判断是不是质数
bool isPrime(int n) { //最快的方法
    if (n < 2) return false;
    if (n == 2 || n == 3) return true;
    if (n % 6 != 1 && n % 6 != 5) return false;
    for (int i = 5; i <= floor(sqrt(n)); i += 6)
        if (n % i == 0 || n % (i + 2) == 0)
            return false;
    return true;
}


int main() {
    int m, n;
    cin >> m >> n;
    for (int i = m; i <= n; ++i) {
        int maxZhiShu = INT32_MIN;
        for (int j = i; j >= 2; j--) {
            if (isPrime(j) && i % j == 0 && j > maxZhiShu) {
                maxZhiShu = j;
            }
        }
        cout << maxZhiShu << " ";
    }

    return 0;
}