oj.uz

Submission #1076201

# Submission time Handle Problem Language Result Execution time Memory
1076201 2024-08-26T11:43:37 Z j_vdd16 Sky Walking (IOI19_walk) C++17
15 / 100
 178 ms 23332 KB 
#include "walk.h"

#include <algorithm>
#include <bitset>
#include <cstdint>
#include <cstring>
#include <iostream>
#include <limits.h>
#include <math.h>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <vector>

#define int long long
#define loop(X, N) for(int X = 0; X < (N); X++)
#define all(V) V.begin(), V.end()
#define rall(V) V.rbegin(), V.rend()

using namespace std;

typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int, int> ii;
typedef vector<ii> vii;
typedef vector<vector<ii>> vvii;
typedef vector<bool> vb;
typedef vector<vector<bool>> vvb;

struct SegTree {
    int n, N;
    vi tree;
    int def = LLONG_MAX / 2;

    SegTree(vi values) {
        n = values.size();
        N = 1;
        while (N < n) N *= 2;

        tree = vi(2 * N, def);
        loop(i, n) {
            tree[N + i] = values[i];
        }

        for (int i = N - 1; i >= 1; i--) {
            tree[i] = merge(tree[2 * i], tree[2 * i + 1]);
        }
    }

    int merge(int a, int b) {
        return min(a, b);
    }

    void set(int idx, int v) {
        idx += N;
        tree[idx] = v;
        idx /= 2;

        while (idx) {
            tree[idx] = merge(tree[idx * 2], tree[idx * 2 + 1]);
            idx /= 2;
        }
    }

    int get(int l, int r, int i = 1, int tl = 0, int tr = -1) {
        if (tr == -1) {
            tr = N;
        }

        if (tr <= l || tl >= r) {
            return def;
        }

        if (tl >= l && tr <= r) {
            return tree[i];
        }

        int tm = (tl + tr) / 2;
        return merge(get(l, r, i * 2, tl, tm), get(l, r, i * 2 + 1, tm, tr));
    }
};

long long min_distance(std::vector<signed> xs, std::vector<signed> hs, std::vector<signed> ls, std::vector<signed> rs, std::vector<signed> ys, signed s, signed g) {
    int n = xs.size();
    int m = ls.size();

    vector<tuple<int, int, int>> bridges(m);
    loop(i, m) {
        bridges[i] = { ys[i], ls[i], rs[i] };
    }
    sort(all(bridges));
    sort(all(ys));

    vii buildings(n);
    loop(i, n) {
        buildings[i] = { xs[i], hs[i] };
    }
    sort(all(buildings));


    SegTree minCost(vi(m, LLONG_MAX / 2));
    SegTree minCostMinusHeight(vi(m, LLONG_MAX / 2));

    vvii open(n), close(n);
    loop(i, m) {
        auto [y, l, r] = bridges[i];

        open[l].push_back({y, i});
        close[r].push_back({y, i});
    }
    loop(i, n) {
        sort(all(open[i]));
        sort(all(close[i]));
    }

    for (auto [y, j] : open[0]) {
        minCost.set(j, ys[j]);
        minCostMinusHeight.set(j, 0);
    }
    for (int i = 1; i < n; i++) {
        int upper = upper_bound(all(ys), buildings[i].second) - ys.begin();
        for (auto [y, j] : open[i]) {
            int newCost = min(minCostMinusHeight.get(0, j) + y, minCost.get(j + 1, upper));
            // if (newCost < 0 || newCost >= LLONG_MAX / 2) {
            //     return -1;
            // }
            
            minCost.set(j, newCost);
            minCostMinusHeight.set(j, newCost - y);
        }

        if (i == n - 1) {
	        int res = minCost.get(0, upper) * 2LL + (int64_t)xs[g] - (int64_t)xs[s];
            if (res < 0 || res >= LLONG_MAX / 2) {
                return -1;
            }
            return res;
        }

        for (auto [y, j] : close[i]) {
            minCost.set(j, LLONG_MAX / 2);
            minCostMinusHeight.set(j, LLONG_MAX / 2);
        }
    }

    return 0;
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 41 ms 8148 KB Output is correct
2 Correct 90 ms 13636 KB Output is correct
3 Correct 108 ms 14996 KB Output is correct
4 Correct 129 ms 22336 KB Output is correct
5 Correct 123 ms 22080 KB Output is correct
6 Correct 154 ms 22092 KB Output is correct
7 Correct 69 ms 15556 KB Output is correct
8 Correct 125 ms 23332 KB Output is correct
9 Correct 119 ms 22336 KB Output is correct
10 Correct 103 ms 22332 KB Output is correct
11 Correct 9 ms 4184 KB Output is correct

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 41 ms 8148 KB Output is correct
2 Correct 90 ms 13636 KB Output is correct
3 Correct 108 ms 14996 KB Output is correct
4 Correct 129 ms 22336 KB Output is correct
5 Correct 123 ms 22080 KB Output is correct
6 Correct 154 ms 22092 KB Output is correct
7 Correct 69 ms 15556 KB Output is correct
8 Correct 125 ms 23332 KB Output is correct
9 Correct 119 ms 22336 KB Output is correct
10 Correct 103 ms 22332 KB Output is correct
11 Correct 9 ms 4184 KB Output is correct
12 Correct 122 ms 14988 KB Output is correct
13 Correct 145 ms 22192 KB Output is correct
14 Correct 171 ms 22084 KB Output is correct
15 Correct 114 ms 22192 KB Output is correct
16 Correct 124 ms 22352 KB Output is correct
17 Correct 137 ms 22296 KB Output is correct
18 Correct 121 ms 22196 KB Output is correct
19 Correct 130 ms 22336 KB Output is correct
20 Correct 83 ms 15560 KB Output is correct
21 Correct 27 ms 8284 KB Output is correct
22 Correct 118 ms 20416 KB Output is correct
23 Correct 108 ms 21052 KB Output is correct
24 Correct 112 ms 21140 KB Output is correct
25 Correct 112 ms 20720 KB Output is correct
26 Correct 128 ms 21140 KB Output is correct
27 Correct 140 ms 21944 KB Output is correct
28 Correct 143 ms 22336 KB Output is correct
29 Correct 172 ms 22204 KB Output is correct
30 Correct 96 ms 15664 KB Output is correct
31 Correct 178 ms 22452 KB Output is correct
32 Correct 112 ms 21848 KB Output is correct
33 Incorrect 131 ms 22844 KB Output isn't correct
34 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -