最短路径HDU3790（Dijkstra)

准备考研，荒废了好多东西，希望做了正确的决定

/*********************************************************
 *author：chen xin
 *email：cx2pirate@gmail.com
 *date：2014.09.09
 * *******************************************************/

#include <stdio.h>
#include <memory.h>

#define MAXINT 0x7fffffff
#define MAXN 1005

typedef struct{
    int dis,cost;
}RECORD;

RECORD record[MAXN];
RECORD map[MAXN][MAXN];
int vis[MAXN];

// O(v + e)
void init(int n);
RECORD dijkstra(int n,int m,int f,int t);

int main(void)
{
    int n,m,f,t;
    int u,v,dis,cost;

    while(scanf("%d%d",&n,&m) && n && m){

        init(n);

        for(int i = ;i < m;i++){
            scanf("%d%d%d%d",&u,&v,&dis,&cost);

            if(map[u][v].dis > dis || map[u][v].dis == dis && map[u][v].cost > cost){
                map[u][v].dis = map[v][u].dis = dis;
                map[u][v].cost = map[v][u].cost = cost;
            }
        }
        scanf("%d%d",&f,&t);

        RECORD res = dijkstra(n,m,f,t);

        printf("%d %d\n",res.dis,res.cost);
    }

    return ;
}

void init(int n)
{
    for(int i = ;i <= n;i++){

        vis[i] = ;
        record[i].dis = record[i].cost = MAXINT;
        for(int j = ;j <= n;j++){
            map[i][j].dis = map[i][j].cost = MAXINT;
        }
    }
}

int relaxable(RECORD u,RECORD v,RECORD edge)
{
    if((u.dis + edge.dis) < v.dis){
        return ;
    }
    if(u.dis + edge.dis == v.dis &&
        u.cost + edge.cost < v.cost){
        return ;
    }
    return ;
}

RECORD dijkstra(int n,int m,int f,int t)
{
    record[f].dis = record[f].cost = ;

    for(int i = ;i <= n;i++){                    

        int min,min_dis = MAXINT,min_cost = MAXINT;
        for(int j = ;j <= n;j++){

            if(!vis[j] && (record[j].dis < min_dis ||
                record[j].dis == min_dis && record[j].cost < min_cost))
            {
                min = j;
                min_dis = record[j].dis;
                min_cost = record[j].cost;
            }

        }

        vis[min] = ;
        for(int k = ;k <= n;k++){

            if(!vis[k] && map[min][k].dis < MAXINT &&
                relaxable(record[min],record[k],map[min][k]))
            {
                    record[k].dis = record[min].dis + map[min][k].dis;
                    record[k].cost = record[min].cost + map[min][k].cost;
            }

        }
    }

    return record[t];
}

//11626983    2014-09-09 23:02:13    Accepted    3790    312MS    8144K    2232 B    G++    超级旅行者