D. Strong Vertices

合集 - 树论(34)

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19.D. Strong Vertices2024-05-16

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收起

原题链接

题解

很巧妙，把等式移项之后，ab差最大的就是答案

code

#include<bits/stdc++.h>
using namespace std;
#define ll long long
struct node
{
    int a,b,df,id;
}c[200005];

bool cmp(node x,node y)
{
    if(x.df!=y.df) return  x.df>y.df;
    else return x.id<y.id;
}
int main()
{
    int t=1;
    cin>>t;
    while(t--)
    {
        ll n;
        cin>>n;
        for(ll i=1;i<=n;i++)
        {
            cin>>c[i].a;
        }

        for(ll i=1;i<=n;i++)
        {
            cin>>c[i].b;
            c[i].df=c[i].a-c[i].b;
            c[i].id=i;
        }

        sort(c+1,c+1+n,cmp);
        ll f=c[1].df;
        int i;
        for(i=1;i<=n;i++)
        {
            if(c[i].df<f) break;
        }
        cout<<i-1<<endl;
        for(int j=1;j<i;j++) cout<<c[j].id<<" ";
        puts("");
    }
    return 0;
}