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Submission #224569

# Submission time Handle Problem Language Result Execution time Memory
224569 2020-04-18T12:38:37 Z dolphingarlic Bulldozer (JOI17_bulldozer) C++14
0 / 100
 5 ms 432 KB 
#include <bits/stdc++.h>
#define FOR(i, x, y) for (int i = x; i < y; i++)
typedef long long ll;
using namespace std;

struct Node {
    ll l, r, tot, best;

    Node operator+(Node B) {
        return {max(l, tot + B.l), max(B.r, r + B.tot), tot + B.tot, max(max(best, B.best), r + B.l)};
    }
} segtree[8000];

struct Obstacle {
    ll x, y, v;

    bool operator<(Obstacle B) {
        if (x == B.x) return y < B.y;
        return x < B.x;
    }
} obstacles[2000];

int n;

void build(int node = 1, int l = 1, int r = n) {
    if (l == r) {
        ll v = max(obstacles[l].v, 0ll);
        segtree[node] = {v, v, obstacles[l].v, v};
    } else {
        int mid = (l + r) / 2;
        build(node * 2, l, mid);
        build(node * 2 + 1, mid + 1, r);
        segtree[node] = segtree[node * 2] + segtree[node * 2 + 1];
    }
}

void update(int pos, ll val, int node = 1, int l = 1, int r = n) {
    if (l == r) segtree[node] = {max(val, 0ll), max(val, 0ll), val, max(val, 0ll)};
    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] = segtree[node * 2] + segtree[node * 2 + 1];
    }
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin >> n;
    FOR(i, 0, n) cin >> obstacles[i].x >> obstacles[i].y >> obstacles[i].v;
    sort(obstacles, obstacles + n);
    build();

    cout << segtree[1].best;
    return 0;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 432 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 360 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 360 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Incorrect 4 ms 384 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 384 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 35.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 384 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 384 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 432 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 360 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 360 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Incorrect 4 ms 384 KB Output isn't correct
13 Halted 0 ms 0 KB -