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Submission #266413

# Submission time Handle Problem Language Result Execution time Memory
266413 2020-08-15T08:44:00 Z dolphingarlic Two Antennas (JOI19_antennas) C++14
0 / 100
 37 ms 23544 KB 
#include <bits/stdc++.h>
typedef long long ll;
using namespace std;

int n, a[200001], b[200001];
ll h[200001], ans[200001];
vector<int> ins[200001], rem[200001];
ll segtree[800001];

void build(int node = 1, int l = 1, int r = n) {
    segtree[node] = INT_MIN;
    if (l != r) {
        int mid = (l + r) / 2;
        build(node * 2, l, mid); build(node * 2 + 1, mid + 1, r);
    }
}

void update(int pos, ll val, int node = 1, int l = 1, int r = n) {
    if (l == r) segtree[node] = val;
    else {
        int mid = (l + r) / 2;
        if (pos > mid) update(pos, val, node * 2 + 1, mid + 1, r);
        else update(pos, val, node * 2, l, mid);
        segtree[node] = max(segtree[node * 2], segtree[node * 2 + 1]);
    }
}

ll query(int x, int y, int node = 1, int l = 1, int r = n) {
    if (l > y || r < x) return INT_MIN;
    if (l >= x && r <= y) return segtree[node];
    int mid = (l + r) / 2;
    return max(query(x, y, node * 2, l, mid), query(x, y, node * 2 + 1, mid + 1, r));
}

void solve() {
    build();
    for (int i = 1; i <= n; i++) {
        for (int j : ins[i]) update(j, h[j]);
        ans[i] = max(ans[i], query(i - b[i], i - a[i]) - h[i]);
        for (int j : rem[i]) update(j, INT_MIN);
    }
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin >> n;
    for (int i = 1; i <= n; i++) {
        cin >> h[i] >> a[i] >> b[i];
        ins[i + a[i]].push_back(i);
        rem[i + b[i]].push_back(i);
    }
    memset(ans, -1, sizeof ans);
    solve();
    for (int i = 1; i <=n; i++) h[i] *= -1;
    solve();
    cout << *max_element(ans + 1, ans + n + 1);
    return 0;
}

Subtask #1
0 / 2.0

# Verdict Execution time Memory Grader output
1 Incorrect 8 ms 11264 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 8 ms 11264 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Runtime error 37 ms 23544 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #4
0 / 65.0

# Verdict Execution time Memory Grader output
1 Incorrect 8 ms 11264 KB Output isn't correct
2 Halted 0 ms 0 KB -