Submission #1165183

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1165183	2025-03-11 08:19:56	Warinchai	Dynamic Diameter (CEOI19_diameter)	C++20	24 / 100	659 ms	1114112 KiB

diameter

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#include<bits/stdc++.h>
#define int long long
using namespace std;
vector<int>adj[200005];
int ar[200005];
int n,q,w;
struct path{
    int l,d,mxpre,mxsuf;
    path(int x=0){
        l=d=mxpre=mxsuf=x;
    }
    friend path operator+(path a,path b){
        path c;
        c.l=a.l+b.l;
        c.mxsuf=max(b.mxsuf,a.mxsuf+b.l);
        c.mxpre=max(a.mxpre,b.mxpre+a.l);
        c.d=max({a.d,b.d,a.mxsuf+b.mxpre});
        return c;
    }
}paths[800005];
struct point{
    int mx,d;
    point(int x=0){
        mx=d=x;
    }
    friend point operator+(point a,point b){
        point c;
        c.mx=max(a.mx,b.mx);
        c.d=max({a.d,b.d,a.mx+b.mx});
        return c;
 
 
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• Subtask 1: 11 / 11
• Subtask 2: 13 / 13
• Subtask 3: 0 / 7
• Subtask 4: 0 / 18
• Subtask 5: 0 / 24
• Subtask 6: 0 / 27