Submission #2152019

---

Source Code Expand

#include <cstdio>
#include <cstring>
#include <algorithm>
#define MOD 1000000007
 
using namespace std;
 
int f[2005],sum[2005];
 
int main() {
  int n,m,k;
  scanf("%d%d%d",&n,&m,&k);
  m--;k--;
  f[0]=1;
  for(int i=0;i<=n;i++) sum[i]=1;
  int ans=0;
  for(int i=1;i<=(n+m)/k;i++) {
    for(int j=n;j>0;j--) {
        f[j]=sum[j];
        if (j>k) f[j]=(f[j]-sum[j-k-1]+MOD)%MOD;
        int s=k*i-j;
        if (s<=m&&j%k==n%k&&s%k==m%k) {
            ans=(ans+sum[j-1])%MOD;
            if (j>k) ans=(ans-sum[j-k-1]+MOD)%MOD;
        }
    }
    for(int j=1;j<=n;j++) sum[j]=(sum[j-1]+f[j])%MOD;
  }
  printf("%d\n",ans);
  return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:12:27: 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