Submission #2123165

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Source Code Expand

#include<cstdio> 
#include<algorithm>
#include<cstring>
#include<cmath>
#include<set>
using namespace std;
typedef long long ll;
typedef double db;
#define fo(i,j,k) for(i=j;i<=k;i++)
#define fd(i,j,k) for(i=j;i>=k;i--)
#define cmax(a,b) (a=(a>b)?a:b)
#define cmin(a,b) (a=(a<b)?a:b)
const int N=1e6+5,mo=1e9+7;
int n,m,K,i,j,k,q1,q2;
ll f[2][2005][2],sum[2005];
int ans;
int main()
{
	scanf("%d %d %d",&n,&m,&K);
	m--;K--;
	q1=0;
	q2=1;
	f[0][0][0]=1;
	fo(i,1,max(n,m)*2)
	{
		fo(j,0,n) sum[j+1]=(sum[j-1+1]+f[q1][j][0]+f[q1][j][1])%mo;
		fo(j,0,n)
		{
			f[q2][j][0]=(sum[j+1]-sum[j-1+1])%mo;
			k=max(0,j-K);
			f[q2][j][1]=(sum[j-1+1]-sum[k-1+1])%mo;
		}
		fo(j,0,n)
			if (j%K==n%K&&(i*K-j)%K==m%K&&i*K-j<=m)
				ans=(ans+f[q2][j][1])%mo;
		q1^=1;q2^=1;
	}
	ans=(ans+mo)%mo;
	printf("%d",ans);
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:19:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d %d",&n,&m,&K);
                            ^

Judge Result