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Submission #996291

# Submission time Handle Problem Language Result Execution time Memory
996291 2024-06-10T11:45:51 Z phoenix Regions (IOI09_regions) C++17
55 / 100
 3911 ms 63556 KB 
#include <bits/stdc++.h>

using namespace std;
using ll = long long;

const int N = 200200;
const int R = 25025;
const int B = 1080;


int T;
int tin[N];
int tout[N];
vector<int> g[N];
int rg[N];

int m;
vector<int> heavy;
vector<int> ver[R];
vector<int> seg[R];

void precalc(int s) {
    tin[s] = ++T;
    seg[rg[s]].push_back(tin[s]);
    for (int to : g[s]) 
        precalc(to);
    tout[s] = ++T;
}


vector<vector<ll>> heavy_ans;
vector<ll> light_ans[N];

int lst[R];
int cnt[N];

bool isheavy(int r) {
    return ((int)seg[r].size() > B);
}

void dfs(int s) {
    for (int i = 0; i < m; i++) {
        int c = heavy[i];
        heavy_ans[i][c] += cnt[lst[c]];
    }

    int x = lst[rg[s]];
    cnt[s] = cnt[lst[rg[s]]] + 1;
    lst[rg[s]] = s;

    light_ans[s].resize(m);
    if (isheavy(rg[s])) {
        int c = lower_bound(heavy.begin(), heavy.end(), rg[s]) - heavy.begin();
        light_ans[s][c]++;
    }
    for (int to : g[s]) {
        dfs(to);
        for (int i = 0; i < m; i++)  
            light_ans[s][i] += light_ans[to][i];
    } 
    lst[rg[s]] = x;
}

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    int n, regions, q;
    cin >> n >> regions >> q;
    for (int i = 1; i <= n; i++) {
        int p;
        if (i > 1) {
            cin >> p;
            g[p].push_back(i);
        }
        cin >> rg[i];
        ver[rg[i]].push_back(i);
    }  
    
    precalc(1);

    for (int i = 1; i <= regions; i++) {
        if (isheavy(i)) {
            heavy.push_back(i);
            heavy_ans.push_back(vector<ll>(regions + 1));
            m++;
        }
        sort(seg[i].begin(), seg[i].end());
    }

    dfs(1);
    while (q--) {
        int r1, r2;
        cin >> r1 >> r2;
        int ans = 0;
        if (isheavy(r1)) {
            int c = lower_bound(heavy.begin(), heavy.end(), r1) - heavy.begin();
            ans = heavy_ans[c][r2];
        } else if (isheavy(r2)) { 
                int c = lower_bound(heavy.begin(), heavy.end(), r2) - heavy.begin();
                for (int v : ver[r1]) {
                    ans += light_ans[v][c];
                }
        } else {
            for (int v : ver[r1]) {
                int l, r;
                l = upper_bound(seg[r2].begin(), seg[r2].end(), tin[v]) - seg[r2].begin();
                r = upper_bound(seg[r2].begin(), seg[r2].end(), tout[v]) - seg[r2].begin();
                ans += max(r - l, 0);
            }
        }
        cout << ans << endl;
    }
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 12632 KB Output is correct
2 Correct 2 ms 12632 KB Output is correct
3 Correct 3 ms 12632 KB Output is correct
4 Correct 5 ms 12632 KB Output is correct
5 Correct 6 ms 12632 KB Output is correct
6 Correct 13 ms 12888 KB Output is correct
7 Correct 20 ms 12628 KB Output is correct
8 Correct 22 ms 12888 KB Output is correct
9 Correct 32 ms 13304 KB Output is correct
10 Correct 57 ms 13144 KB Output is correct
11 Correct 99 ms 13400 KB Output is correct
12 Correct 104 ms 14168 KB Output is correct
13 Correct 139 ms 13656 KB Output is correct
14 Correct 201 ms 14168 KB Output is correct
15 Correct 205 ms 18008 KB Output is correct

Subtask #2
40.0 / 85.0

# Verdict Execution time Memory Grader output
1 Incorrect 1199 ms 19800 KB Output isn't correct
2 Incorrect 1100 ms 22156 KB Output isn't correct
3 Incorrect 2029 ms 28276 KB Output isn't correct
4 Correct 214 ms 14168 KB Output is correct
5 Correct 275 ms 16468 KB Output is correct
6 Correct 1140 ms 15436 KB Output is correct
7 Correct 1483 ms 16472 KB Output is correct
8 Correct 1076 ms 23384 KB Output is correct
9 Correct 1956 ms 22136 KB Output is correct
10 Correct 3911 ms 29152 KB Output is correct
11 Correct 3642 ms 21296 KB Output is correct
12 Incorrect 1206 ms 28880 KB Output isn't correct
13 Incorrect 1539 ms 29576 KB Output isn't correct
14 Incorrect 2001 ms 46632 KB Output isn't correct
15 Incorrect 2717 ms 35696 KB Output isn't correct
16 Incorrect 2593 ms 44880 KB Output isn't correct
17 Incorrect 2485 ms 63556 KB Output isn't correct