oj.uz

답안 #516019

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
516019 2022-01-20T10:04:19 Z Jeff12345121 Pinball (JOI14_pinball) C++14
0 / 100
 0 ms 204 KB 
#include <bits/stdc++.h>
#define int long long
#define in cin
#define out cout
using namespace std;

//ifstream in("in.in");
//ofstream out("out.out");

int n, m;
const int inf = (1LL << 60);
struct Dev {
    int l, r, hole, cost;
};
vector<Dev> dev;

struct SegTree {
    int l, r, val; /// val = min
    SegTree *lChild, *rChild;

    SegTree(int l, int r) : l(l) , r(r) {
        if (l == r) {
            val = inf;
        } else {
            int mij = (l + r) / 2;
            lChild = new SegTree(1, mij);
            rChild = new SegTree(mij + 1, r);
            recalc();
        }
    }

    void recalc() {
        val = min(lChild->val, rChild->val);
    }
    void update(int p, int newVal) {
        if (p < l || p > r) return;

        if (l == p && r == p) {
            val = min(val, newVal);
            return;
        }

        lChild->update(p, newVal);
        rChild->update(p, newVal);
        recalc();
    }

    int query(int ql, int qr) {
        if (qr < l || ql > r) return inf;

        if (ql <= l && r <= qr) {
            return val;
        }

        return min(lChild->query(ql, qr), rChild->query(ql, qr));
    }
};

template <typename F>
int getDp(vector<int> &dp, F f) {
    /// we want to have all the pinballs take it past left
    // dp[i] = minCost to get all balls to this device
    dp.resize(m + 1);
    for (int i = 1; i <= m; i++) {
        dp[i] = inf;
    }
    int ans = inf;
    for (int i = 1; i <= m; i++) {
        if (f(dev[i])) {
            dp[i] = dev[i].cost;
        }
        for (int j = 1; j < i; j++) {
            if (dev[i].l <= dev[j].hole && dev[j].hole <= dev[i].r) {
                dp[i] = min(dp[i], dp[j] + dev[i].cost);
            }
        }
    }
    return ans;
}
set<int> values;
unordered_map<int, int> valToNorm;
int32_t main() {
    in >> m >> n;
    /// m is number of lines, n is number of collumns

    dev.resize(m + 1);
    for (int i = 1; i <= m; i++) {
        int l, r, hole, cost;
        in >> l >> r >> hole >> cost;
        values.insert(l);
        values.insert(r);
        values.insert(hole);
        dev[i] = {l, r, hole, cost};
    }

    int nr = 0;
    for (auto k : values) {
        valToNorm[k] = ++nr;
    }

    for (int i = 1; i <= m; i++) {
        dev[i].l = valToNorm[dev[i].l];
        dev[i].r = valToNorm[dev[i].r];
        dev[i].hole = valToNorm[dev[i].hole];
    }

        vector<int> leftDp, rightDp;
    getDp(leftDp, [&](Dev x) {
        return x.l == 1;
    });

    getDp(rightDp , [&](Dev x) {
        return x.r == n;
    });

    int ans = inf;
    for (int i = 1; i <= m; i++) {
        /// i is middle
        int leftCost = inf, rightCost = inf;
        if (dev[i].l > 1) {
            for (int j = 1; j < i; j++) {
               // if (i == j) continue;

                if (dev[i].l <= dev[j].hole && dev[j].hole <= dev[i].r) {
                    leftCost = min(leftCost, leftDp[j]);
                }
            }
        } else {
            leftCost = 0;
        }

        if (dev[i].r < n) {
            for (int j = 1; j < i; j++) {
                //if (i == j) continue;

                if (dev[i].l <= dev[j].hole && dev[j].hole <= dev[i].r) {
                    rightCost = min(rightCost, rightDp[j]);
                }
            }
        } else {
            rightCost = 0;
        }

        ans = min(ans, leftCost + rightCost + dev[i].cost);
        // cout << "\n";
    }

    if (ans == inf) {
        out << "-1\n";
    } else {
        out << ans << "\n";
    }
}

Subtask #1
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 49.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -