Submission #3733116
Source Code Expand
#include<iostream> using namespace std; const int dx[4]={1,0,-1,0},dy[4]={0,-1,0,1}; //方向数组,和DFS一样 int a[250001],b[250001],x,y,sx,sy,ex,ey,n,m,map[501][501]; char s[501][501]; bool check=false; //是否已经搜索到终点的判断 int main() { int i,j; cin>>n>>m; for(i=1;i<=n;i++) for(j=1;j<=m;j++) cin>>s[i][j]; //输入 for(i=1;i<=n;i++) for(j=1;j<=m;j++) { if(s[i][j]=='.') map[i][j]=0; if(s[i][j]=='#') map[i][j]=1; if(s[i][j]=='s'){sx=i; sy=j; map[i][j]=0;} if(s[i][j]=='g'){ex=i; ey=j; map[i][j]=0;} } //map[i][j]为1代表不可行,0代表可行,sx和sy是起点坐标,ex和ey是终点坐标 int head=0,tail=1; map[sx][sy]=-1; a[tail]=sx; b[tail]=sy; //初始化,a数组储存x坐标,b数组储存y坐标 while(head!=tail) //借助队列实现BFS,算法的主体 { head++; //队头指针指向待扩展节点 for(i=0;i<4;i++) //可向四个方向移动 { x=a[head]+dx[i]; y=b[head]+dy[i]; //搜索与此节点相连的四个点 if(x<=n&&x>0&&y<=m&&y>0&&!map[x][y]) //边界和障碍物以及是否访问过的判断 { //如果在地图内且不是障碍格且未被访问过 tail++; //队尾指针加1,指向新搜索到的节点 a[tail]=x; b[tail]=y; //将此节点入队 map[x][y]=-1; //标记为已被访问过(障碍格为1,已访问过的格为-1) if(x==ex&&y==ey) //找到了终点 { cout<<"Yes"<<endl; check=1; //后面的操作无需继续进行,退出循环 } } } if(check==true) break; //退出循环 } if(check==false) cout<<"No"<<endl; //当所有可以走到的节点都被访问之后,仍找不到目标节点,输出No return 0; }
Submission Info
Submission Time | |
---|---|
Task | A - 深さ優先探索 |
User | luogu_bot5 |
Language | C++ (GCC 5.4.1) |
Score | 100 |
Code Size | 2055 Byte |
Status | AC |
Exec Time | 20 ms |
Memory | 2688 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 100 / 100 | ||||
Status |
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Set Name | Test Cases |
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Sample | 00_sample_01.txt, 00_sample_02.txt, 00_sample_03.txt, 00_sample_04.txt, 00_sample_05.txt |
All | 00_min_01.txt, 00_min_02.txt, 00_min_03.txt, 00_min_04.txt, 00_min_05.txt, 00_min_06.txt, 00_min_07.txt, 00_min_08.txt, 00_sample_01.txt, 00_sample_02.txt, 00_sample_03.txt, 00_sample_04.txt, 00_sample_05.txt, 01_rnd_00.txt, 01_rnd_01.txt, 01_rnd_02.txt, 01_rnd_03.txt, 01_rnd_04.txt, 01_rnd_05.txt, 01_rnd_06.txt, 01_rnd_07.txt, 01_rnd_08.txt, 01_rnd_09.txt, 01_rnd_10.txt, 01_rnd_11.txt, 01_rnd_12.txt, 01_rnd_13.txt, 01_rnd_14.txt, 01_rnd_15.txt, 01_rnd_16.txt, 01_rnd_17.txt, 01_rnd_18.txt, 01_rnd_19.txt, 02_rndhard_00.txt, 02_rndhard_01.txt, 02_rndhard_02.txt, 02_rndhard_03.txt, 02_rndhard_04.txt, 02_rndhard_05.txt, 02_rndhard_06.txt, 02_rndhard_07.txt, 02_rndhard_08.txt, 02_rndhard_09.txt, 02_rndhard_10.txt, 02_rndhard_11.txt, 02_rndhard_12.txt, 02_rndhard_13.txt, 02_rndhard_14.txt, 02_rndhard_15.txt, 02_rndhard_16.txt, 02_rndhard_17.txt, 02_rndhard_18.txt, 02_rndhard_19.txt, 02_rndhard_20.txt, 02_rndhard_21.txt, 02_rndhard_22.txt, 02_rndhard_23.txt, 02_rndhard_24.txt, 02_rndhard_25.txt, 02_rndhard_26.txt, 02_rndhard_27.txt, 02_rndhard_28.txt, 02_rndhard_29.txt, 02_rndhard_30.txt, 02_rndhard_31.txt, 02_rndhard_32.txt, 02_rndhard_33.txt, 02_rndhard_34.txt, 02_rndhard_35.txt, 02_rndhard_36.txt, 02_rndhard_37.txt, 02_rndhard_38.txt, 02_rndhard_39.txt, 03_rndhardsmall_00.txt, 03_rndhardsmall_01.txt, 03_rndhardsmall_02.txt, 03_rndhardsmall_03.txt, 03_rndhardsmall_04.txt, 03_rndhardsmall_05.txt, 03_rndhardsmall_06.txt, 03_rndhardsmall_07.txt, 03_rndhardsmall_08.txt, 03_rndhardsmall_09.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
00_min_01.txt | AC | 1 ms | 256 KB |
00_min_02.txt | AC | 1 ms | 256 KB |
00_min_03.txt | AC | 1 ms | 256 KB |
00_min_04.txt | AC | 1 ms | 256 KB |
00_min_05.txt | AC | 1 ms | 256 KB |
00_min_06.txt | AC | 1 ms | 256 KB |
00_min_07.txt | AC | 1 ms | 256 KB |
00_min_08.txt | AC | 1 ms | 256 KB |
00_sample_01.txt | AC | 1 ms | 256 KB |
00_sample_02.txt | AC | 1 ms | 256 KB |
00_sample_03.txt | AC | 1 ms | 256 KB |
00_sample_04.txt | AC | 1 ms | 256 KB |
00_sample_05.txt | AC | 1 ms | 256 KB |
01_rnd_00.txt | AC | 16 ms | 1408 KB |
01_rnd_01.txt | AC | 16 ms | 1664 KB |
01_rnd_02.txt | AC | 18 ms | 2048 KB |
01_rnd_03.txt | AC | 19 ms | 2688 KB |
01_rnd_04.txt | AC | 17 ms | 2176 KB |
01_rnd_05.txt | AC | 16 ms | 1536 KB |
01_rnd_06.txt | AC | 19 ms | 2304 KB |
01_rnd_07.txt | AC | 19 ms | 2304 KB |
01_rnd_08.txt | AC | 16 ms | 1536 KB |
01_rnd_09.txt | AC | 16 ms | 1408 KB |
01_rnd_10.txt | AC | 19 ms | 2304 KB |
01_rnd_11.txt | AC | 16 ms | 1536 KB |
01_rnd_12.txt | AC | 19 ms | 2688 KB |
01_rnd_13.txt | AC | 16 ms | 1536 KB |
01_rnd_14.txt | AC | 17 ms | 1536 KB |
01_rnd_15.txt | AC | 18 ms | 2176 KB |
01_rnd_16.txt | AC | 15 ms | 1536 KB |
01_rnd_17.txt | AC | 20 ms | 2560 KB |
01_rnd_18.txt | AC | 16 ms | 1536 KB |
01_rnd_19.txt | AC | 17 ms | 2048 KB |
02_rndhard_00.txt | AC | 16 ms | 1536 KB |
02_rndhard_01.txt | AC | 16 ms | 1536 KB |
02_rndhard_02.txt | AC | 18 ms | 1664 KB |
02_rndhard_03.txt | AC | 17 ms | 1664 KB |
02_rndhard_04.txt | AC | 16 ms | 1536 KB |
02_rndhard_05.txt | AC | 16 ms | 1536 KB |
02_rndhard_06.txt | AC | 16 ms | 1536 KB |
02_rndhard_07.txt | AC | 16 ms | 1536 KB |
02_rndhard_08.txt | AC | 16 ms | 1536 KB |
02_rndhard_09.txt | AC | 16 ms | 1536 KB |
02_rndhard_10.txt | AC | 16 ms | 1536 KB |
02_rndhard_11.txt | AC | 16 ms | 1536 KB |
02_rndhard_12.txt | AC | 17 ms | 1536 KB |
02_rndhard_13.txt | AC | 16 ms | 1536 KB |
02_rndhard_14.txt | AC | 16 ms | 1536 KB |
02_rndhard_15.txt | AC | 16 ms | 1536 KB |
02_rndhard_16.txt | AC | 16 ms | 1536 KB |
02_rndhard_17.txt | AC | 16 ms | 1536 KB |
02_rndhard_18.txt | AC | 16 ms | 1536 KB |
02_rndhard_19.txt | AC | 16 ms | 1536 KB |
02_rndhard_20.txt | AC | 17 ms | 1536 KB |
02_rndhard_21.txt | AC | 17 ms | 1536 KB |
02_rndhard_22.txt | AC | 17 ms | 1536 KB |
02_rndhard_23.txt | AC | 17 ms | 1536 KB |
02_rndhard_24.txt | AC | 16 ms | 1536 KB |
02_rndhard_25.txt | AC | 16 ms | 1536 KB |
02_rndhard_26.txt | AC | 17 ms | 1536 KB |
02_rndhard_27.txt | AC | 16 ms | 1408 KB |
02_rndhard_28.txt | AC | 16 ms | 1536 KB |
02_rndhard_29.txt | AC | 16 ms | 1536 KB |
02_rndhard_30.txt | AC | 16 ms | 1536 KB |
02_rndhard_31.txt | AC | 16 ms | 1408 KB |
02_rndhard_32.txt | AC | 16 ms | 1536 KB |
02_rndhard_33.txt | AC | 16 ms | 1536 KB |
02_rndhard_34.txt | AC | 16 ms | 1536 KB |
02_rndhard_35.txt | AC | 16 ms | 1536 KB |
02_rndhard_36.txt | AC | 19 ms | 1536 KB |
02_rndhard_37.txt | AC | 16 ms | 1536 KB |
02_rndhard_38.txt | AC | 17 ms | 1536 KB |
02_rndhard_39.txt | AC | 16 ms | 1536 KB |
03_rndhardsmall_00.txt | AC | 1 ms | 256 KB |
03_rndhardsmall_01.txt | AC | 1 ms | 256 KB |
03_rndhardsmall_02.txt | AC | 1 ms | 256 KB |
03_rndhardsmall_03.txt | AC | 1 ms | 256 KB |
03_rndhardsmall_04.txt | AC | 1 ms | 256 KB |
03_rndhardsmall_05.txt | AC | 1 ms | 256 KB |
03_rndhardsmall_06.txt | AC | 1 ms | 256 KB |
03_rndhardsmall_07.txt | AC | 1 ms | 256 KB |
03_rndhardsmall_08.txt | AC | 1 ms | 256 KB |
03_rndhardsmall_09.txt | AC | 1 ms | 256 KB |