oj.uz

Submission #958341

# Submission time Handle Problem Language Result Execution time Memory
958341 2024-04-05T12:47:53 Z riariti Palembang Bridges (APIO15_bridge) C++17
63 / 100
 2000 ms 7492 KB 
#line 1 "Palembang_Bridges.cpp"
#include <bits/stdc++.h>

#define int std::int64_t

#ifdef local
#define dbg(__VA_ARGS__)                                                       \
    std::cerr << "[DBG|" << __LINE__ << "]: " << __VA_ARGS__ << std::endl;
#define cerr(__VA_ARGS__) std::cerr << __VA_ARGS__;

template <class T> void vec_out(const std::vector<T> &cc) {
    dbg("vector: ");
    for (auto x : cc) {
        cerr(x << " ");
    }
    cerr("\n");
}
#else
#define dbg(...)
#define cerr(...)

template <class T> void vec_out(const std::vector<T> &cc) {}
#endif

using namespace std;

using ll = long long;

const int mod = ll(1e9) + 7; //(b + (a%b)) % b (to mod -1%(10^9+7) correctly in
                             // c++ its -1 but its suppose to be 10^9+6
const int N = ll(2e5) + 100;
const long long inf = 5e18;

int k, n, m;
pair<int, int> point[N];

#define ff first
#define ss second
bool cmp(pair<int, int> a, pair<int, int> b) {
    return (a.ff + a.ss) < (b.ff + b.ss);
}

#define all(a) a.begin(), a.end()
#define pb push_back

vector<int> get(int l, int r) {
    if (l > r)
        return {};
    vector<int> res;
    for (int i = l; i <= r; i++)
        res.pb(point[i].ff), res.pb(point[i].ss);
    sort(all(res));
    return res;
}

std::int32_t main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);

    cin >> k >> n;
    long long ex = 0;
    for (int i = 1; i <= n; i++) {
        char p, q;
        int s, t;
        cin >> p >> s >> q >> t;
        if (s > t)
            swap(s, t);
        if (p == q)
            ex += t - s;
        else {
            ex++;
            point[++m] = {s, t};
        }
    }
    sort(point + 1, point + m + 1, cmp);
    long long ans = 0;
    if (k == 1) {
        vector<int> pos = get(1, m);
        int mid = (pos.size()) / 2;
        for (auto x : pos)
            ans += abs(pos[mid] - x);
    } else if (k == 2 && m) {
        ans = inf;
        for (int i = 1; i <= m; i++) {
            vector<int> pos1 = get(1, i), pos2 = get(i + 1, m);
            int mid1 = (pos1.size()) / 2, mid2 = (pos2.size()) / 2;
            long long res = 0;
            for (auto x : pos1)
                res += abs(pos1[mid1] - x);
            for (auto x : pos2)
                res += abs(pos2[mid2] - x);
            ans = min(ans, res);
        }
    }
    cout << ans + ex;

    /*
    int K, N;
    std::cin >> K >> N;
    std::vector<std::tuple<char, std::int64_t, char, std::int64_t>> PSQT(N);
    for (auto &[P, S, Q, T] : PSQT) {
        std::cin >> P >> S >> Q >> T;
    }

    std::int64_t ans = 0;
    std::vector<std::pair<std::int64_t, std::int64_t>> HW;
    for (auto [P, S, Q, T] : PSQT) {
        if (S > T) {
            std::swap(S, T);
        }

        if (P == Q) {
            ans += std::abs(T - S);
            continue;
        }

        // the roads
        ans++;

        HW.emplace_back(S, T);
    }
    std::sort(HW.begin(), HW.end(), [](const auto &x, const auto &y) {
        return (x.first + x.second) < (y.first + y.second);
    });

    auto calc = [&](std::int64_t S, std::int64_t T, std::int64_t x) {
        return std::abs(S - x) + std::abs(T - x) + 1;
    };

    auto get = [&](int l, int r) {
        if (l > r) {
            return std::vector<std::int64_t>{};
        }

        std::vector<std::int64_t> pts;
        for (int i = l; i <= r; i++) {
            auto &&[H, W] = HW[i];

            pts.push_back(H);
            pts.push_back(W);
        }
        std::sort(pts.begin(), pts.end());

        return pts;
    };

    if (K == 1) {
        // find median as that is optimal for the
        // for all sum abs(S - x) + abs(T - x)

        auto pts = get(0, HW.size() - 1);

        auto mid = pts.size() / 2;
        mid--;

        for (auto x : pts) {
            ans += std::abs(x - pts[mid]);
        }

        std::cout << ans << "\n";

        return 0;
    }

    // split at some point i
    // then using same median technique as in K = 1
    // then we get 2 sub vectors => in each find median (still optimal) and then
    // add them up, thus giving you the 2 bridges

    std::int64_t res = LLONG_MAX;
    for (int f = 0; f < HW.size(); f++) {
        auto fir = get(0, f);
        auto sec = get(f + 1, HW.size() - 1);

        if (fir.empty() || sec.empty()) {
            continue;
        }

        vec_out(fir);
        vec_out(sec);

        auto m0 = fir.size() / 2;
        m0--;

        auto m1 = sec.size() / 2;
        m1--;

        auto md0 = fir[m0];
        auto md1 = fir[m1];

        std::int64_t tmp = 0;
        // for (auto [H, W] : HW) {
        //     tmp += std::min(calc(H, W, md0), calc(H, W, md1));
        // }

        for (auto x : fir) {
            tmp += std::abs(x - fir[m0]);
        }
        for (auto x : sec) {
            tmp += std::abs(x - sec[m1]);
        }

        res = std::min(res, tmp);
    }

    ans += res;

    std::cout << ans << "\n";
    */

    return 0;
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 600 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 344 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 20 ms 4860 KB Output is correct
13 Correct 41 ms 4868 KB Output is correct
14 Correct 37 ms 4824 KB Output is correct
15 Correct 23 ms 3800 KB Output is correct
16 Correct 21 ms 4820 KB Output is correct
17 Correct 26 ms 4752 KB Output is correct
18 Correct 30 ms 4860 KB Output is correct
19 Correct 32 ms 4848 KB Output is correct
20 Correct 24 ms 4820 KB Output is correct
21 Correct 29 ms 4852 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 500 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct

Subtask #4
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 464 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 464 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 19 ms 776 KB Output is correct
14 Correct 63 ms 348 KB Output is correct
15 Correct 76 ms 516 KB Output is correct
16 Correct 2 ms 344 KB Output is correct
17 Correct 21 ms 852 KB Output is correct
18 Correct 10 ms 348 KB Output is correct
19 Correct 21 ms 348 KB Output is correct
20 Correct 21 ms 344 KB Output is correct
21 Correct 53 ms 520 KB Output is correct
22 Correct 21 ms 348 KB Output is correct
23 Correct 19 ms 344 KB Output is correct
24 Correct 20 ms 348 KB Output is correct

Subtask #5
0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 464 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 460 KB Output is correct
13 Correct 19 ms 348 KB Output is correct
14 Correct 64 ms 528 KB Output is correct
15 Correct 74 ms 532 KB Output is correct
16 Correct 2 ms 344 KB Output is correct
17 Correct 18 ms 344 KB Output is correct
18 Correct 10 ms 348 KB Output is correct
19 Correct 20 ms 548 KB Output is correct
20 Correct 22 ms 348 KB Output is correct
21 Correct 53 ms 536 KB Output is correct
22 Correct 20 ms 516 KB Output is correct
23 Correct 21 ms 592 KB Output is correct
24 Correct 20 ms 348 KB Output is correct
25 Execution timed out 2084 ms 7492 KB Time limit exceeded
26 Halted 0 ms 0 KB -