题目 质因数分解 隔板代码
#include <bits/stdc.h>
using namespace std;
#define x first
#define y second
typedef long long ll;
unordered_map<ll, int> mp;
ll cal_c(ll a)
{return (a) * (a - 1) / 2;
}
int main()
{ll n 2021041820210418;for (int i …
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