hdu1026

Posted 2020-08-27 王坤1993

#include <stdio.h>
#include <string.h>
#include <queue>
using namespace std;

struct node
{
int x,y,step;
friend bool operator<(node n1,node n2)
{
return n2.step<n1.step;
}
};

int map[105][105];
int flag[105][105];
int cnt[105][105];//记录怪的血量
int to[4][2] = {1,0,-1,0,0,1,0,-1};
int n,m,tim;

int check(int x,int y)
{
if(x<0 || y<0 || x>=n || y>=m)
return 1;
if(map[x][y] == -1)
return 1;
return 0;
}

int bfs()
{
int i;
priority_queue<node> Q;
node a,next;
a.x = 0;
a.y = 0;
a.step = 0;
map[0][0] = -1;
Q.push(a);
while(!Q.empty())
{
a = Q.top();
Q.pop();
if(a.x == n-1 && a.y == m-1)
return a.step;
for(i = 0; i<4; i++)
{
next = a;
next.x+=to[i][0];
next.y+=to[i][1];
if(check(next.x,next.y))
continue;
next.step =a.step+map[next.x][next.y]+1;//记录时间
map[next.x][next.y] = -1;//标记为走过
flag[next.x][next.y] = i+1;//记录朝向
Q.push(next);
}
}
return 0;
}

void print(int x,int y)
{
int n_x,n_y;
if(!flag[x][y])
return;
n_x = x - to[flag[x][y]-1][0];
n_y = y - to[flag[x][y]-1][1];
print(n_x,n_y);
printf("%ds:(%d,%d)->(%d,%d)\n",tim++,n_x,n_y,x,y);
while(cnt[x][y]--)
{
printf("%ds:FIGHT AT (%d,%d)\n",tim++,x,y);
}
}

int main()
{
int i,j;
while(~scanf("%d%d",&n,&m))
{
memset(map,0,sizeof(map));
memset(flag,0,sizeof(flag));
memset(cnt,0,sizeof(cnt));
char s[105];
for(i = 0; i<n; i++)
{
scanf("%s",s);
for(j = 0; s[j]; j++)
{
if(s[j] == ‘.‘)
map[i][j] = 0;
else if(s[j] == ‘X‘)
map[i][j] = -1;
else
map[i][j] = cnt[i][j] = s[j]-‘0‘;
}
}
int ans = 0;
ans = bfs();
if(ans)
{
printf("It takes %d seconds to reach the target position, let me show you the way.\n",ans);
tim = 1;
print(n-1,m-1);
}
else
printf("God please help our poor hero.\n");
printf("FINISH\n");
}

return 0;
}