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[UVA] 929 - Number Maze

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/**********************************************************************************/
/*  Problem: d793 "929 - Number Maze" from UVa ACM 929                            */
/*  Language: C (1909 Bytes)                                                      */
/*  Result: AC judge by zeroserver@ZeroJudge                                      */
/*  Author: morris1028 at 2010-09-22 11:43:39                                     */
/**********************************************************************************/


#include<stdio.h>
#include<stdlib.h>
#define MaxValue 32767
#define Size 1000
char Map[Size][Size];
short Dis[Size][Size];
int T, N, M, a, b;
int Sx, Sy, Gx, Gy, L;
struct  Heap
{
    short x, y, F;
}Heap[1000000], Temp;
/*Heap以下*/
void Swap(int P, int S)
{
    Temp=Heap[P], Heap[P]=Heap[S], Heap[S]=Temp;
}
void Insert ()/*Min Heap*/
{
    int S=L, P=L/2;
    while(S>=2 && Heap[P].F>Heap[S].F)
        Swap(P,S), S=P, P=S/2;
}
void Delete ()
{
    int P=1, S=2*P;
    Swap(1,L), L--;
    while(S<=L)
        {
            if(S<L && Heap[S+1].F<Heap[S].F)  S++;
            if(Heap[P].F<=Heap[S].F)  break;
            Swap(P,S), P=S, S=2*P;
        }
}
/*Heap以上*/
void Judge(int Nx, int Ny, int Cx, int Cy)/*near,x,y*/
{
    if(Nx<0 || Nx>=N || Ny<0 || Ny>=M)  return;
    if(Dis[Nx][Ny] > Dis[Cx][Cy]+Map[Nx][Ny])
        Dis[Nx][Ny]=Dis[Cx][Cy]+Map[Nx][Ny],
        Heap[++L].F=Dis[Nx][Ny], Heap[L].x=Nx, Heap[L].y=Ny,
        Insert();
}
void Search(int N, int M)
{
    Sx=0, Sy=0, Gx=N-1, Gy=M-1;
    int Cx, Cy;
    L=1, Heap[1].x=Sx, Heap[1].y=Sy;
    Dis[0][0]=Map[0][0];
    while( L>0 )
        {
            Cx=Heap[1].x, Cy=Heap[1].y;
            if(Cx==Gx && Cy==Gy) break;
            Delete();
            Judge (Cx+1,Cy,Cx,Cy);
            Judge (Cx-1,Cy,Cx,Cy);
            Judge (Cx,Cy+1,Cx,Cy);
            Judge (Cx,Cy-1,Cx,Cy);
        }
    printf("%d\n",Dis[Gx][Gy]);
}
main()
{
    while(scanf("%d",&T)==1)
        while(T--)
            {
                scanf("%d %d",&N,&M);
                int Sum=0;
                for(a=0;a<N;a++)
                    for(b=0;b<M;b++)
                        getchar(), Map[a][b]=getchar()-'0', Dis[a][b]=MaxValue, Sum+=Map[a][b];
                if(Sum)
                    Search (N, M);
                else puts("0");
            }
    return 0;
}

台長: Morris
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