29 lines
502 B
C++
29 lines
502 B
C++
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#include <iostream>
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using namespace std;
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typedef long long LL;
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int n;
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//计算阶乘
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LL fac(int x) {
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LL res = 1;
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for (int i = 1; i <= x; i++) res *= i;
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return res;
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}
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int main() {
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cin >> n;
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//计算阶乘
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cout << fac(n) << endl;
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//计算阶乘和
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LL sum = 0;
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for (int i = 1; i <= n; i++) {
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LL res = 1;
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for (int j = 1; j <= i; ++j)
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res *= j;
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sum += res;
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}
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cout << sum << endl;
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return 0;
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}
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