oj.uz

Submission #913917

# Submission time Handle Problem Language Result Execution time Memory
913917 2024-01-20T13:43:00 Z VMaksimoski008 Regions (IOI09_regions) C++14
27 / 100
 1710 ms 99228 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
 
const int maxn = 2e5 + 5;
 
void setIO() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
}
 
int n, r, q, i, in[maxn], out[maxn], timer = 0, ans = 0;
short home[maxn], r1, r2;
vector<vector<int> > graph, dp;
 
void dfs(int u) {
    dp[home[u]][u]++;
 
    for(int &v : graph[u]) {
        dfs(v);
        for(i=1; i<=r; i++)
            dp[i][u] += dp[i][v];
    }
}

void dfs2(int u) {
    in[u] = timer++;
    for(int &v : graph[u])
        dfs(v);
    out[u] = timer;
}

bool anc(int u, int v) { return (in[u] <= in[v] && out[u] >= out[v]); }
 
int32_t main() {
    setIO();
 
    cin >> n >> r >> q;
    graph.resize(n+1);
    vector<int> cnt(r+1);
 
    cin >> home[1];
    cnt[home[1]]++;
 
    for(i=2; i<=n; i++) {
        int p;
        cin >> p >> home[i];
        cnt[home[i]]++;
        graph[p].push_back(i);
    }
 
    if(r <= 300) {
        dp.resize(r+1, vector<int>(n+1));
        dfs(1);
 
        vector<vector<int> > by_home(r+1);
        for(i=1; i<=n; i++)
            by_home[home[i]].push_back(i);
 
        while(q--) {
            ans = 0;
            cin >> r1 >> r2;
 
            for(int &x : by_home[r1])
                ans += dp[r2][x];
        
            cout << ans << endl;
        }
        return 0;
    }

    if(*max_element(cnt.begin(), cnt.end()) <= 500) {
        dfs2(1);

        vector<vector<int> > by_home(r+1);
        for(i=1; i<=n; i++)
            by_home[home[i]].push_back(i);

        while(q--) {
            ans = 0;
            cin >> r1 >> r2;

            for(int &u : by_home[r1])
                for(int &v : by_home[r2]) ans += anc(u, v);

            cout << ans << endl;
        }
    }
 
    return 0;
}

Subtask #1
12.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 2 ms 344 KB Output is correct
5 Correct 3 ms 344 KB Output is correct
6 Correct 9 ms 1112 KB Output is correct
7 Correct 12 ms 1368 KB Output is correct
8 Correct 16 ms 2136 KB Output is correct
9 Correct 33 ms 6744 KB Output is correct
10 Runtime error 3 ms 1624 KB Execution killed with signal 11
11 Correct 71 ms 17240 KB Output is correct
12 Runtime error 5 ms 3160 KB Execution killed with signal 11
13 Runtime error 7 ms 2480 KB Execution killed with signal 11
14 Correct 169 ms 25760 KB Output is correct
15 Correct 244 ms 43148 KB Output is correct

Subtask #2
15.0 / 85.0

# Verdict Execution time Memory Grader output
1 Correct 1089 ms 65144 KB Output is correct
2 Correct 1529 ms 74584 KB Output is correct
3 Correct 1710 ms 99228 KB Output is correct
4 Runtime error 7 ms 3672 KB Execution killed with signal 11
5 Runtime error 9 ms 4892 KB Execution killed with signal 11
6 Runtime error 15 ms 5992 KB Execution killed with signal 11
7 Runtime error 21 ms 7768 KB Execution killed with signal 11
8 Runtime error 23 ms 12120 KB Execution killed with signal 11
9 Runtime error 41 ms 17508 KB Execution killed with signal 11
10 Runtime error 38 ms 20636 KB Execution killed with signal 11
11 Runtime error 46 ms 18292 KB Execution killed with signal 11
12 Incorrect 42 ms 11128 KB Unexpected end of file - int32 expected
13 Incorrect 38 ms 10532 KB Unexpected end of file - int32 expected
14 Incorrect 39 ms 10560 KB Unexpected end of file - int32 expected
15 Incorrect 47 ms 12164 KB Unexpected end of file - int32 expected
16 Incorrect 42 ms 11996 KB Unexpected end of file - int32 expected
17 Incorrect 45 ms 12020 KB Unexpected end of file - int32 expected