这题我不会动规啊!怎么办!
我(灵机一damn):逝逝暴力递推!
于是...
40分代码:
#include<bits/stdc++.h>
int n,m,x,y,ans,a[30][30]={0};
using namespace std;
int main(){
cin>>n>>m>>x>>y;
for(int i=0;i<=n;i++){
for(int j=0;j<=m;j++){
a[i][j]=1;
}
}
a[x][y]=0;
if(x+2<=n&&y-1>=0) a[x+2][y-1]=0;
if(x+2<=n&&y+1<=m) a[x+2][y+1]=0;
if(x-2>=0&&y+1<=m) a[x-2][y+1]=0;
if(x-2>=0&&y-1>=0) a[x-2][y-1]=0;
if(x+1>=0&&y+2<=m) a[x-1][y+2]=0;
if(x-1>=0&&y-2>=0) a[x+1][y-2]=0;
if(x+1<=n&&y-2>=0) a[x-1][y-2]=0;
if(x-1<=n&&y+2<=m) a[x+1][y+2]=0;
for(int i=0;i<=n;i++){
for(int j=0;j<=m;j++){
if(i==0&&j==0) continue;
if(a[i][j]==0) continue;
if(i==0) a[i][j]=a[i][j-1];
else if(j==0) a[i][j]=a[i-1][j];
else{
a[i][j]=a[i-1][j]+a[i][j-1];
}
}
}
cout<<a[n][m];
return 0;
}
你就说暴力不暴力吧
但这60分怎么办捏?