23 lines
689 B
C++
23 lines
689 B
C++
|
#include <bits/stdc++.h>
|
|||
|
|
|
|||
|
|
using namespace std;
|
|||
|
|
int a[10001] = {0}, n; //数组很大，记得开在外面哦
|
|||
|
|
int main() {
|
|||
|
|
ios::sync_with_stdio(false); //读入输出优化的强迫症
|
|||
|
|
cin >> n;
|
|||
|
|
//1就不用了，从2到n一个一个来
|
|||
|
|
for (int i = 2; i <= n; i++) {
|
|||
|
|
//备份一下，不然等会被除掉了
|
|||
|
|
int i2 = i;
|
|||
|
|
//从2开始判断是否可以整除
|
|||
|
|
for (int j = 2; j <= i; j++)
|
|||
|
|
while (i2 % j == 0) {
|
|||
|
|
a[j]++;
|
|||
|
|
i2 /= j;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
for (int i = 1; i <= 10000; i++) //输出
|
|||
|
|
if (a[i] != 0) {
|
|||
|
|
cout << i << " " << a[i] << endl;
|
|||
|
|
}
|
|||
|
|
}
|