链表存图 数据待加强

Posted 2021-03-16 lja001162

Description

给定n个点, m条单向
n<=10000, m <= 100000
有k个询问，询问x出去的所有边
由于没有配置SPJ，输出边的顺序按照加边的顺序倒着输出，具体见样例

Input

Output

Sample Input

4 5
1 2 5
1 3 4
2 4 3
1 4 8
1 1 10
2
1
2

Sample Output

1->1:10
1->4:8
1->3:4
1->2:5
2->4:3

HINT

Source

//
//  b.cpp
//  noip
//
//  Created by lijian3256 on 2019/12/21.
//  Copyright ? 2019 lijian3256. All rights reserved.
//
 
#include <stdio.h>
#include <iostream>
#include <string.h>
using namespace std;
int n, m;
int h[1001], cnt;
int nxt[100001], val[100001], zd[100001];
void addedge(int a, int b, int c) {
    cnt ++;
    val[cnt] = c, zd[cnt] = b;
     
    nxt[cnt] = nxt[ h[a] ];
    nxt[h[a]] = cnt;
}
int main() {
    cin >> n >> m;
    for (int i = 1; i <= n; i ++) {
        h[i] = i;
    }
    cnt = n;
    memset(nxt, 0, sizeof(nxt));
    for (int i = 1; i <= m; i ++) {
        int a, b, c;
        cin >> a >> b >> c;
        addedge(a, b, c);//a->b:c
    //  addedge(b, c, a);
    }
    int k;
    cin >> k;
    for (int i = 1; i <= k; i ++) {
        int x;
        cin >> x;
        for (int p = nxt[h[x]]; p != 0; p = nxt[p]) {
            printf("%d->%d:%d
", x, zd[p], val[p]);
        }
    }
    return 0;
}
 
/**************************************************************
    Problem: 2428
    User: LJA001162
    Language: C++
    Result: 正确
    Time:0 ms
    Memory:2712 kb
****************************************************************/