HUD 1026 纯C代码广搜

#include<stdio.h>
int m,n,t = 0,ft[105][105],dp[105][105],q[101*101*20][2];
char a[105][105];
int dir[4][2]= {{0,-1},{0,1},{1,0},{-1,0}};

void bfs()
{
int x,y,xx,yy,parent,front = 0,rear = 1,tt,i;
q[0][0] = q[0][1] = 0; dp[0][0] = 0;
while(front != rear)
{
x = q[front][0]; y = q[front][1];
parent = front; front++;
for(i = 0; i < 4; i++)
{
xx = x + dir[i][0]; yy = y + dir[i][1];
if(xx < 0 || xx >= n || yy < 0 || yy >= m) continue;
if(a[xx][yy] == 'X') continue;
tt = dp[x][y] + 1;
if(a[xx][yy] != '.') tt += a[xx][yy] - '0';
if(dp[xx][yy] != -1 && dp[xx][yy] <= tt) continue;//此处需注意，一旦 <=  变成 < 就会爆时间
dp[xx][yy] = tt;
ft[xx][yy] = parent;
q[rear][0] = xx; q[rear][1] = yy;
rear++;
}
}

}
void show(int x,int y)
{

int i,_=ft[x][y];
if(ft[x][y] == -1) return;
show(q[_][0],q[_][1]);
t++;
printf("%ds:(%d,%d)->(%d,%d)\n",t,q[_][0],q[_][1],x,y);
if(a[x][y] != '.')
{
for(i = 0; i < a[x][y] - '0'; i++)
{
printf("%ds:FIGHT AT (%d,%d)\n",++t,x,y);
}
}
}

int main()
{
int i,j;
while(~scanf("%d%d",&n,&m))
{
t = 0;
getchar();
memset(ft,-1,sizeof(ft));
memset(dp,-1,sizeof(dp));
for(i = 0; i < n; i++)
{
gets(a[i]);
}
bfs();

if(dp[n - 1][m - 1] == -1) printf("God please help our poor hero.\nFINISH\n");
else
{
printf("It takes %d seconds to reach the target position, let me show you the way.\n",dp[n - 1][m - 1]);
show(n - 1, m - 1);
printf("FINISH\n");
}
}

return 0;
}