OJ-Problems-Source/HDOJ/4141_autoAC.cpp

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#include <stdio.h>
#include <string.h>
#include <iostream>
using namespace std;
#define N 1010
int vis[N][N],height[N][N];
int m,n,cnt;
int mo[][2] = {0,1, 0,-1, 1,0, -1,0};
bool ok(int x,int y,int c)
{
return x > 0 && x <= m && y > 0 && y <= n && height[x][y] >= c;
}
bool boundary(int x,int y)
{
return x == 1 || y == 1 || x == m || y == n;
}
void dfs(int x,int y,int c)
{
height[x][y] = 0;
if(boundary(x,y))
++cnt;
int s,t;
for(int i = 0; i < 4; ++i)
{
s = x + mo[i][0];
t = y + mo[i][1];
if(ok(s,t,c))
dfs(s,t,height[s][t]);
}
}
int main()
{
int t,a;
int x,y;
int sp = 0;
scanf("%d",&t);
while(t--)
{
int i,j;
scanf("%d%d%d%d",&m,&n,&x,&y);
for( i = 1 ; i <= m; ++i)
for( j = 1 ; j <= n; ++j)
scanf("%d",&height[i][j]);
cnt = 0;
dfs(x,y,height[x][y]);
printf("Case #%d: %d\n",++sp,cnt);
}
return 0;
}