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- #include <bits/stdc++.h>
- using namespace std;
- #define ll long long
- ll mod(ll a,ll c,ll mm)
- {
- if(c==0) return 1;
- ll x=mod(a,c>>1,mm);
- x=(x*x)%mm;
- if(c&1)
- {
- x=(x*a)%mm;
- }
- return x;
- }
- int main()
- {
- ios_base::sync_with_stdio(0);
- cin.tie(0);
- cout.tie(0);
- ll a,c,d=1,i,j,k=1e9+7,l;
- cin>>a;
- for(i=2; i<=a; i++)
- {
- d=(d*i)%k;
- }
- cout<<(d+k-mod(2,a-1,k))%k<<endl;
- return 0;
- }
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