delete pics to save space

1.1443.cpp

@@ -0,0 +1,38 @@
+// luogu-judger-enable-o2
+#include<cstdio>
+#include<cstring>
+#include<queue>
+using namespace std;
+const int maxn=405;
+const int dr[]={-2,-2,-1,1,2,2,1,-1};
+const int dc[]={-1,1,2,2,1,-1,-2,-2};
+struct node { int r,c; };
+int dis[maxn][maxn];
+int n,m,r,c;
+int main()
+{
+	scanf("%d%d%d%d",&n,&m,&r,&c);
+	memset(dis,-1,sizeof(dis));
+	queue<node> que;
+	que.push((node){r,c});
+	dis[r][c]=0;
+	while(que.size())
+	{
+		node u=que.front(); que.pop();
+		for(int i=0;i<8;i++)
+		{
+			node v=(node){u.r+dr[i],u.c+dc[i]};
+			if(v.r>=1&&v.r<=n&&v.c>=1&&v.c<=m&&dis[v.r][v.c]==-1)
+			{
+				dis[v.r][v.c]=dis[u.r][u.c]+1;
+				que.push(v);
+			}
+		}
+	}
+	for(int i=1;i<=n;i++)
+	{
+		for(int j=1;j<=m;j++) printf("%-5d",dis[i][j]);
+		printf("\n");
+	} 
+	return 0;
+}