92pts bfs WA最后一个点 求助
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92pts bfs WA最后一个点 求助
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潘德理2010楼主2023/12/16 23:41
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
int n,m,d[33][33],sx,sy,ex,ey;
int x[8]={1,1,-1,-1,2,2,-2,-2},y[8]={2,-2,2,-2,1,-1,1,-1};
int sum[33][33],dis[33][33],vis[33][33];
ll val[33][33];
queue<pair<int,int> > q;
int main(){
	scanf("%d%d",&n,&m);
	for(int i=1;i<=n;i++){
		for(int j=1;j<=m;j++){
			scanf("%d",&d[i][j]);
			if(d[i][j]==3){
				sx=i,sy=j;
				d[i][j]=1;
			}
			if(d[i][j]==4){
				ex=i,ey=j;
				d[i][j]=1;
			}
		}
	}
	memset(sum,0x3f3f3f,sizeof(sum));
	sum[sx][sy]=0;
	memset(dis,0x3f3f3f,sizeof(dis));
	dis[sx][sy]=0;
	val[sx][sy]=1;
	q.push(make_pair(sx,sy));
	while(!q.empty()){
		int kx=q.front().first,ky=q.front().second;
		q.pop();
		if(vis[kx][ky]) continue;
		vis[kx][ky]=1;
		if(d[kx][ky]==2) continue;
		for(int i=0;i<8;i++){
			int nx=kx+x[i],ny=ky+y[i];
			if(nx<1||nx>n||ny<1||ny>m) continue;
			if(d[nx][ny]==2) continue;
			if(sum[nx][ny]>sum[kx][ky]+(1-d[nx][ny])){
				sum[nx][ny]=sum[kx][ky]+(1-d[nx][ny]);
				dis[nx][ny]=dis[kx][ky]+1;
				val[nx][ny]=val[kx][ky];
			}
			else if(sum[nx][ny]==sum[kx][ky]+(1-d[nx][ny])){
				if(dis[nx][ny]>dis[kx][ky]+1){
					dis[nx][ny]=dis[kx][ky]+1;
					val[nx][ny]=val[kx][ky];
				}
				else if(dis[nx][ny]==dis[kx][ky]+1){
					val[nx][ny]+=val[kx][ky];
				}
			}
			q.push(make_pair(nx,ny));
		}
	}
	if(sum[ex][ey]>1e9){
		printf("-1");
		return 0;
	}
	printf("%d\n%d\n%lld",sum[ex][ey],dis[ex][ey],val[ex][ey]);
}
2023/12/16 23:41
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