poj 2251 Dungeon Master (三维bfs)

Escaped in %d minute(s)

这意思是答案为1输出minute,不为1输出minutes还是说是不是1都输出minute(s)?
试了下，答案是后者。

/*************************************************************************
> File Name: code/2015summer/searching/B.cpp
> Author: 111qqz
> Email: rkz2013@126.com
> Created Time: 2015年07月17日 星期五 16时47分46秒
************************************************************************/

#include<iostream>
#include<iomanip>
#include<cstdio>
#include<algorithm>
#include<cmath>
#include<cstring>
#include<string>
#include<map>
#include<set>
#include<queue>
#include<vector>
#include<stack>
using namespace std;
#define REP(i, n) for (int i=0;i<int(n);++i)
typedef long long LL;
typedef unsigned long long ULL;
const int N=40;
char st

;
int d

;
int l,r,c;
int sx,sy,sz,tx,ty,tz;
int dirx[6]={1,-1,0,0,0,0};
int diry[6]={0,0,-1,1,0,0};
int dirz[6]={0,0,0,0,1,-1};

bool ok(int x,int y,int z)
{
if (z>=0&&z<l&&x>=0&&x<r&&y>=0&&y<c&&d[z][x][y]==-1&&st[z][x][y]!='#')
return true;
return false;
}

void bfs()
{
memset(d,-1,sizeof(d));
queue<int>x;
queue<int>y;
queue<int>z;
x.push(sx);
y.push(sy);
z.push(sz);
d[sz][sx][sy]=0;
while (!x.empty()&&!y.empty()&&!z.empty())
{
int prex = x.front();x.pop();
int prey = y.front();y.pop();
int prez = z.front();z.pop();
for ( int  i = 0 ; i < 6 ; i++ )
{
int newx = prex+dirx[i];
int newy = prey+diry[i];
int newz = prez+dirz[i];
bool flag = ok(newx,newy,newz);
if (flag)
{
d[newz][newx][newy]=d[prez][prex][prey]+1;
x.push(newx);
y.push(newy);
z.push(newz);
}
}

}
}

int main()
{
while (scanf("%d %d %d",&l,&r,&c))
{
if (l==0&&r==0&&c==0)
break;
for ( int i = 0 ; i < l ; i++)
{
for ( int j = 0 ; j < r; j++)
scanf("%s",st[i][j]);
}
for ( int i = 0 ; i < l ; i++ )
{
for ( int j = 0 ; j < r ; j ++)
{
for ( int k =  0 ;  k < c ; k++ )
{
if (st[i][j][k]=='S')
{
sx = j;
sy = k;
sz = i;
}
if (st[i][j][k]=='E')
{
tx = j;
ty = k;
tz = i;
}

}
}
}
bfs();
int ans = d[tz][tx][ty];
if (ans==-1)
{
printf("Trapped!\n");
}
else
{
//    if (ans==1)
//    printf("Escaped in 1 minute.\n");
//    else printf("Escaped in %d minutes.\n",ans);
printf("Escaped in %d minute(s).\n",ans);
}

}
}