第十三章链表 3 AcWing 1587. 链表重复数据删除

川长思鸟来 2024-03-31 02:39 66阅读 0赞

## 第十三章 链表 3 AcWing 1587. 链表重复数据删除 ##

### 原题链接 ###

[AcWing 1587. 链表重复数据删除][AcWing 1587.]

### 算法标签 ###

链表

### 思路 ###

依题意模拟

### 代码 ###

#pragma GCC optimize(2)
    #pragma GCC optimize(3)
    #include<bits/stdc++.h>
    #define int long long
    #define xx first
    #define yy second
    #define ump unordered_map
    #define us unordered_set
    #define pq priority_queue
    #define pb push_back
    #define rep(i, a, b) for(int i=a;i<b;++i)
    #define Rep(i, a, b) for(int i=a;i>=b;--i)
    using namespace std;
    typedef pair<int, int> PII;
    const int N=100005, inf=0x3f3f3f3f3f3f3f3f, mod=1e9+7;
    const double Exp=1e-8;
    //int t, n, m, cnt, ans; 
    int h, n, e[N], ne[N];
    bool st[N];
    inline int rd(){
       int s=0,w=1;
       char ch=getchar();
       while(ch<'0'||ch>'9'){if(ch=='-')w=-1;ch=getchar();}
       while(ch>='0'&&ch<='9') s=s*10+ch-'0',ch=getchar();
       return s*w;
    }
    void put(int x) {
        if(x<0) putchar('-'),x=-x;
        if(x>=10) put(x/10);
        putchar(x%10^48);
    }
    signed main(){
    	ios::sync_with_stdio(false);
    	cin.tie(0);
    	cout.tie(0);
    	h=rd(), n=rd();
    	int ad, da, nex;
    	rep(i, 0, n){
    	    ad=rd(), da=rd(), nex=rd();
    	    e[ad]=da, ne[ad]=nex;
    	}
    	vector<int> a, b;
    	for(int i=h; i!=-1; i=ne[i]){
    	    int x=abs(e[i]);
    	    if(st[x]){
    	    	// 放入节点id
    	        b.pb(i);
    	    }else{
    	        st[x]=true;
    	        a.pb(i);
    	    }
    	}
    	rep(i, 0, a.size()){
    	   printf("%05lld %lld ", a[i], e[a[i]]);
    	    if(i==a.size()-1){
    	        puts("-1");    
    	    }else{
    	        printf("%05lld\n", a[i+1]);
    	    }
    	}
    	rep(i, 0, b.size()){
    	   printf("%05lld %lld ", b[i], e[b[i]]);
    	    if(i==b.size()-1){
    	        puts("-1");    
    	    }else{
    	        printf("%05lld\n", b[i+1]);
    	    }
    	}
    	return 0;
    }

### 参考文献 ###

[AcWing 1587. 链表重复数据删除（PAT甲级辅导课）y总视频讲解][AcWing 1587. _PAT_y]

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[AcWing 1587.]: https://www.acwing.com/problem/content/1589/
[AcWing 1587. _PAT_y]: https://www.acwing.com/video/1301/
[9cb4cb80a18345158f8a69e2f196e5b9.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/bb3bb6e12960422c8372f8b51b4f429f.png