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