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답안 #152779

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
152779 2019-09-09T13:33:37 Z dolphingarlic Pinball (JOI14_pinball) C++14
0 / 100
 2 ms 376 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 Barrier {
    int a, b, c, d;
} brs[100000];
set<int> xs;
map<int, int> compressed;
ll segtree[808080], dp1[100000], dp2[100000];
int m, n;

void update(int pos, ll val, int node = 1, int l = 1, int r = (int)xs.size()) {
    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] = min(segtree[node * 2], segtree[node * 2 + 1]);
    }
}
ll query(int x, int y, int node = 1, int l = 1, int r = (int)xs.size()) {
    if (x > r || y < l) return LLONG_MAX / 4;
    else if (x <= l && y >= r) return segtree[node];
    else {
        int mid = (l + r) / 2;
        return min(query(x, y, node * 2, l, mid), query(x, y, node * 2 + 1, mid + 1, r));
    }
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin >> m >> n;
    xs.insert(1);
    xs.insert(n);
    FOR(i, 0, m) {
        cin >> brs[i].a >> brs[i].b >> brs[i].c >> brs[i].d;
        xs.insert(brs[i].a); xs.insert(brs[i].b); xs.insert(brs[i].c);
    }
    int indx = 1;
    for (int i : xs) {
        compressed[i] = indx++;
    }

    FOR(i, 2, (int)xs.size() + 1) update(i, LLONG_MAX / 4);
    update(1, 0);
    FOR(i, 0, m) {
        dp1[i] = query(compressed[brs[i].a], compressed[brs[i].b]) + brs[i].d;
        if (dp2[i] < LLONG_MAX / 4) update(compressed[brs[i].c], dp1[i]);
    }

    FOR(i, 1, (int)xs.size()) update(i, LLONG_MAX / 4);
    update((int)xs.size(), 0);
    FOR(i, 0, m) {
        dp2[i] = query(compressed[brs[i].a], compressed[brs[i].b]) + brs[i].d;
        if (dp2[i] < LLONG_MAX / 4) update(compressed[brs[i].c], dp2[i]);
    }

    ll ans = LLONG_MAX;
    FOR(i, 0, m) ans = min(ans, dp1[i] + dp2[i] - brs[i].d);
    if (ans < LLONG_MAX / 4) cout << ans;
    else cout << -1;
    return 0;
}

Subtask #1
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 376 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 376 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 376 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 49.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 376 KB Output isn't correct
2 Halted 0 ms 0 KB -