标签:
2 5 5 ...** *.**. ..... ..... *.... 1 1 1 1 3 5 5 ...** *.**. ..... ..... *.... 2 1 1 1 3
no yes
#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
#include <queue>
#define maxn 200
using namespace std;
char map[maxn][maxn];
int turn[maxn][maxn];
int n, m, k, sx, sy, ex, ey;
bool flag;
int dir[4][2] = {0, 1, 0, -1, 1, 0, -1, 0};
struct node{
int x, y;
};
bool check(int x, int y){
if(x >= 0 && x < n && y >=0 && y < m && map[x][y] != '*')
return true;
else
return false;
}
void bfs(int sx, int sy){
queue<node>q;
node st, ed;
st.x = sx, st.y = sy;
q.push(st);
while(!q.empty()){
st = q.front();
q.pop();
if(st.x == ex && st.y == ey){
if(turn[st.x][st.y] - 1 <= k){
flag = true;
return ;
}
}
for(int i = 0; i < 4; ++i){
ed.x = st.x + dir[i][0];
ed.y = st.y + dir[i][1];
while(check(ed.x ,ed.y)){
//q.push(ed);
if(turn[ed.x][ed.y] == 0){
turn[ed.x][ed.y] = turn[st.x][st.y] + 1;
q.push(ed);
}
ed.x += dir[i][0];//沿着四个走到底。
ed.y += dir[i][1];
}
}
}
}
int main (){
int T;
scanf("%d", &T);
while(T--){
scanf("%d%d", &n, &m);
for(int i = 0; i < n; ++i)
scanf("%s", map[i]);
scanf("%d%d%d%d%d", &k, &sy, &sx, &ey, &ex);
sx--, sy--, ex--, ey--;
flag = 0;
memset(turn, 0, sizeof(turn));
bfs(sx, sy);
if(flag)
printf("yes\n");
else
printf("no\n");
}
return 0;
}
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原文地址:http://blog.csdn.net/hpuhjh/article/details/47310941