Submission #472627

#	Time	Username	Problem	Language	Result	Execution time	Memory
472627		Ozy	Dynamic Diameter (CEOI19_diameter)	C++17	7 / 100	261 ms	16460 KiB

diameter

#include <iostream>
#include <bits/stdc++.h>
using namespace std;
#define lli long long int
#define rep(i,a,b) for (int i = (a); i <= (b); i++)
#define repa(i,a,b) for (int i = (a); i >= (b); i--)
#define debug(a) cout << #a << " = " << a << endl
#define debugsl(a) cout << #a << " = " << a << ", "

#define MAX 100000

lli n,q,w,a,b,c,last,id;
lli peso[MAX+2];
vector<lli> hijos[MAX+2];
pair<lli,lli> arr[MAX+2];
multiset<lli> maximo;
multiset<lli>::iterator it;

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    cin >> n >> q >> w;
    rep(i,1,n-1) {
        cin >> a >> b >> c;
        hijos[a].push_back(b);
        hijos[b].push_back(a);

        arr[i] = {a,b};
        peso[i] = c;
        maximo.insert(-c);
    }

    last = 0;
    rep(i,1,q) {

        //correcto
        cin >> id >> c;
        id += last;
        id %= (n-1);
        id++;
        c += last;
        c %= w;

        it = maximo.lower_bound(-peso[id]);
        maximo.erase(it);

        peso[id] = c;
        maximo.insert(-c);

        it = maximo.lower_bound(-w);
        a = *it;
        if (n > 2) {
            it++;
            b = *it;
            a += b;
        }
        a *= -1;

        cout << a << "\n";
        last = a;
    }
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 13
• Subtask 3: 7 / 7
• Subtask 4: 0 / 18
• Subtask 5: 0 / 24
• Subtask 6: 0 / 27