Submission #2182129

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Source Code Expand

#include <cstdio>
#include <cstring>
#define ref(i,x,y)for(int i=x;i<=y;++i)
const int N=4010,mod=1e9+7;
int n,m,K,ans,f[N],g[N];
int main(){
	scanf("%d%d%d",&n,&m,&K);
	int md=(n+m-1)/(K-1);
	ref(i,1,K-1)f[i]=1;
	ref(i,2,md+1){
		int ms=(i-1)*(K-1)+1;
		int np=(ms-n>1)?(ms-n):1;
		int mp=(m<ms-1)?m:(ms-1);
		ref(j,np,mp)if(f[j]&&(m-j)%(K-1)==0)
			(ans+=f[j])%=mod;
		if(i>md)break;
		memset(g,0,sizeof g);
		ref(j,0,ms)if(f[j])
			ref(k,0,K-1)(g[j+k]+=f[j])%=mod;
		memcpy(f,g,sizeof g);
	}
	printf("%d\n",ans);
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:7:26: 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