改了几天了，求大佬帮忙看看吧

#include <bits/stdc++.h>
using namespace std;
int n, m, x, y, z, blood, cnt, head[100005], cost[10005], f[10005], vis[10005];
struct node{
    int to, next, dis;
}e[100005];
struct point{
    int blod, maxn, p;
    point(int i, int j, int k){
        blod = i, maxn = j, p = k;
    }
};
queue <point> q;
void add(int u, int v, int d){
    e[++cnt].dis = d;
    e[cnt].next = head[u];
    e[cnt].to = v;
    head[u] = cnt;
}
int main(){
    memset(f, 0x3f, sizeof(f));
    scanf("%d%d%d", &n, &m, &blood);
    for(int i = 1; i <= n; i++)
        scanf("%d", &cost[i]);
    for(int i = 1; i <= m; i++){
        scanf("%d%d%d", &x, &y, &z);
        add(x, y, z);
        add(y, x, z);
    }
    vis[1] = 1;
    f[1] = cost[1];
    q.push(point(blood, cost[1], 1));
    while(!q.empty()){
        int u = q.front().p, b = q.front().blod, temp = q.front().maxn;
        q.pop();
        vis[u] = 0;
        for(int i = head[u]; i; i = e[i].next){
            int v = e[i].to, w = e[i].dis;
            if(b < w) continue;
            if(f[v] > max(cost[v], temp)){  
                f[v] = max(cost[v], temp);
                if(!vis[v]) vis[v] = 1, q.push(point(b - w, max(cost[v], temp), v));
            }
        } 
    }
    if(f[n] != 1061109567) printf("%d", f[n]);
    else printf("AFK");
    return 0;
}