Cod sursa(job #2740951)
Utilizator | Data | 14 aprilie 2021 20:54:18 | |
---|---|---|---|
Problema | Grigo | Scor | 100 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva de probleme | Marime | 0.45 kb |
#include <bits/stdc++.h>
using namespace std;
ifstream fin("grigo.in");
ofstream fout("grigo.out");
int vc[100001],dp[100001];
#define mod 1000003
int main()
{
int n,m,i,a;
fin>>n>>m;
for(i=1;i<=m;++i){
fin>>a;
vc[a]=1;
}
dp[1]=1;
for(i=2;i<=n;++i){
if(vc[i]==0)
dp[i]=(1LL*dp[i-1]*(i-1))%mod;
else
dp[i]=dp[i-1];
}
fout<<dp[n];
return 0;
}