Submission #2114538

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Source Code Expand

#include<bits/stdc++.h>
using namespace std;
const int N=4010,mod=924844033;
int n,K,f[N][N][2],g[N],Fac[N];bool vis[N][2],d[N];
int main(){
  scanf("%d%d",&n,&K);
  int tot=0;
  for(int i=1;i<=n;i++){
	  for(int j=0;j<2;j++){
		  if(vis[i][j])continue;
		  int t=0;
		  for(int x=i,y=j;x<=n;x+=K,y^=1)vis[x][y]=1,t++;
		  d[tot+=t]=1;
	  }
  }
  f[0][0][1]=1;
  for(int i=0;i<tot;i++){
	  for(int j=0;j<=i;j++){
		  f[i+1][j][0]=(1ll*f[i+1][j][0]+f[i][j][0]+f[i][j][1])%mod;
		  if(!d[i])f[i+1][j+1][1]=(f[i+1][j+1][1]+f[i][j][0])%mod;
	  }
  }
  for(int i=1;i<=n;i++)
	  g[i]=(f[tot][i][0]+f[tot][i][1])%mod;
  Fac[0]=1;
  for(int i=1;i<=n;i++)Fac[i]=1ll*Fac[i-1]*i%mod;
  int ans=Fac[n];
  for(int i=1;i<=n;i++)ans=(ans+1ll*(i&1?-1:1)*g[i]*Fac[n-i])%mod;
  if(ans<0)ans+=mod;
  cout<<ans<<endl;
  return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:6:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&n,&K);
                      ^

Judge Result