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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#623703 | #7057. Digital Path | bright_ml# | WA | 2ms | 12520kb | C++20 | 1.5kb | 2024-10-09 13:47:02 | 2024-10-09 13:47:03 |
Judging History
answer
//
// Created by 35395 on 2024/10/9.
//
#include<bits/stdc++.h>
using namespace std;
#define int long long
const int N=1010;
int dp[N][N];
int a[N][N];
const int mod=1e9+7;
signed main() {
ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
int n,m;
cin>>n>>m;
for(int i=1;i<=n;i++){
for(int j=1;j<=m;j++){
cin>>a[i][j];
}
}
memset(dp,-1,sizeof dp);
int dir[4][2]={0,1,1,0,-1,0,0,-1};
auto dfs=[&](auto &&self,int x,int y){
if(dp[x][y]!=-1)return dp[x][y];
int res=0;
dp[x][y]=0;
for(int i=0;i<4;i++){
int xx=x+dir[i][1];
int yy=y+dir[i][0];
if(xx<1||xx>n||yy<1||yy>m)continue;
if(a[xx][yy]!=a[x][y]+1)continue;
res++;
dp[x][y]=(self(self,xx,yy)+dp[x][y])%mod;
}
if(res==0)return dp[x][y]=1;
return dp[x][y];
};
int ans=0;
for(int i=1;i<=n;i++){
for(int j=1;j<=m;j++){
dfs(dfs,i,j);
}
}
for(int i=1;i<=n;i++){
for(int j=1;j<=m;j++){
int flag=0;
for(int c=0; c < 4; c++){
int xx=i+dir[c][1];
int yy=j+dir[c][0];
if(xx<1||xx>n||yy<1||yy>m)continue;
if(a[xx][yy]!=a[i][j]-1)continue;
flag=1;
}
if(flag==0)ans+=dp[i][j];
ans%=mod;
}
}
cout<<ans<<endl;
return 0;
}
Details
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Test #1:
score: 0
Wrong Answer
time: 2ms
memory: 12520kb
input:
3 5 1 2 3 8 7 -1 -1 4 5 6 1 2 3 8 7
output:
6
result:
wrong answer 1st lines differ - expected: '4', found: '6'