Submission #850676

#	Time	Username	Problem	Language	Result	Execution time	Memory
850676		TahirAliyev	Vinjete (COI22_vinjete)	C++17	24 / 100	5 ms	804 KiB

Main

#pragma GCC optimize("O3")
#include <bits/stdc++.h>
 
using namespace std;
 
#define ll long long int
#define oo 1e9
#define pii pair<ll, int>

const int MAX = 1002;
int n, m;
vector<array<int, 3>> g[MAX];

pii combine(pii a, pii b){
    if(a.second < b.first - 1 || b.second < a.first - 1){
        return {-1, -1};
    }
    return {min(a.first, b.first), max(a.second, b.second)};
}

set<pii> s;
int ans[MAX];

void dfs(int node, int p, int l, int r){
    vector<pii> del;
    for(auto& a : s){
        pii c = combine(a, {l, r});
        if(c.first == -1){
            ans[node] += a.second - a.first + 1;
            continue;
        }
        del.push_back(a);
        l = c.first, r = c.second;
    }
    for(auto& a : del){
        s.erase(a);
    }
    ans[node] += r - l + 1;
    if(node != 1){
        s.insert({l, r});
    }
    for(auto to : g[node]){
        if(p == to[0]) continue;
        dfs(to[0], node, to[1], to[2]);
    }
    s.erase({l, r});
    for(auto& a : del){
        s.insert(a);
    }
}


int main(){
    cin >> n >> m;
    for(int i = 1; i < n; i++){
        int a, b, l, r; cin >> a >> b >> l >> r;
        g[a].push_back({b, l, r});
        g[b].push_back({a, l, r});
    }
    dfs(1, 1, 0, 0);
    for(int i = 2; i <= n; i++){
        cout << ans[i] << '\n';
    }
}

• Subtask 1: 11 / 11
• Subtask 2: 13 / 13
• Subtask 3: 0 / 16
• Subtask 4: 0 / 29
• Subtask 5: 0 / 31