19 lines
314 B
C++
19 lines
314 B
C++
#include<bits/stdc++.h>
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using namespace std;
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#define MOD 1000000
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int main()
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{
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int i, j, n, m, S = 0;
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scanf("%d", &n);
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for(i = 1; i <= n; i++)
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{
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m = 1;
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for(j = 1; j <= i; j++) m = (m*j) % MOD;
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S = (S+m) % MOD;
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}
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printf("%d\n", S);
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return 0;
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}
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