hdu1078FatMouse and Cheese
题目连接:http://acm.hdu.edu.cn/showproblem.php?pid=1078
1 #include<cstdio> 2 #include<cstring> 3 #include<algorithm> 4 using namespace std; 5 const int maxn=1010; 6 int dp[maxn][maxn]; 7 int p[maxn][maxn]; 8 int n,k; 9 int dir[4][2]={0,1,0,-1,1,0,-1,0}; 10 11 int dfs(int x,int y) 12 { 13 int ans=0; 14 int xx,yy; 15 if(!dp[x][y]) 16 { 17 for(int i=1;i<=k;i++) //最多走k步 18 { 19 for(int j=0;j<4;j++) 20 { 21 xx=x+dir[j][0]*i; 22 yy=y+dir[j][1]*i; 23 if(xx>=1&&yy>=1&&xx<=n&&yy<=n&&p[xx][yy]>p[x][y]) 24 ans=max(ans,dfs(xx,yy)); 25 } 26 } 27 dp[x][y]=ans+p[x][y]; 28 } 29 return dp[x][y]; 30 } 31 int main() 32 { 33 while(scanf("%d%d",&n,&k)&&(n!=-1&&k!=-1)) 34 { 35 for(int i=1;i<=n;i++) 36 for(int j=1;j<=n;j++) 37 scanf("%d",&p[i][j]); 38 memset(dp,0,sizeof(dp)); 39 printf("%d\n",dfs(1,1)); 40 } 41 }