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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#588940#6820. Youth FinaleSunlight9#WA 2ms6008kbC++202.2kb2024-09-25 15:21:232024-09-25 15:21:25

Judging History

你现在查看的是最新测评结果

  • [2024-09-25 15:21:25]
  • 评测
  • 测评结果:WA
  • 用时:2ms
  • 内存:6008kb
  • [2024-09-25 15:21:23]
  • 提交

answer

#include <bits/stdc++.h>

using namespace std;
using ll = long long;
using LL = long long;
#define int LL

struct Bit {
    int n;
    vector<ll> s;

    Bit (int _n) {
        n = _n;
        s.assign(n + 1, {});
    }

    int lowbit(int x) {
        return x & -x;
    }

    void add(int x, int k) {
        while (x <= n) {
            s[x] += k;
            x += lowbit(x);
        }
    };

    LL qy(int x) {
        LL res = 0;
        while (x >= 1) {
            res += s[x];
            x -= lowbit(x);
        }
        return res;
    }

    LL qy(int l, int r) {
        return qy(r) - qy(l - 1);
    }
};

constexpr int M = 3E5 + 20;

signed main() {
    cin.tie(nullptr) -> sync_with_stdio(false);

    int n, m;
    cin >> n >> m;

    vector<int> a(n + 1), b(n + 1);
    for (int i = 1; i <= n; i++) {
        int x;
        cin >> x;
        a[i] = b[n - i + 1] = x;
    }

    a.insert(a.end(), a.begin() + 1, a.end());
    b.insert(b.end(), b.begin() + 1, b.end());
    int n2 = n + n;

    auto work = [&](vector<int> &p) {
        Bit bit(M);
        vector<LL> sum(n2 + 1);
        for (int i = 1; i <= n2; i++) {
            int j = i - n;
            if (j > 0) bit.add(p[j], -1);
            sum[i] = sum[i - 1] + bit.qy(p[i] + 1, M);
            if (j > 0) sum[i] -= bit.qy(p[j] - 1);
            bit.add(p[i], 1);
        }
        return sum;
    };

//    cerr << "??? \n";

    auto sa = work(a);
    auto sr = work(b);

    auto show = [&](auto &x) {
        for (int i = 1; i <= n2; i++) {
            cout << x[i] << " \n"[i == n2];
        }
    };

//    show(a);
//    show(sa);
//    show(b);
//    show(sr);

    int inr = 1, r = n;
    auto reg = [&](int x) {
        if (x >= n2) x -= n;
        if (x < n) x += n;
        return x;
    };

    string ans = "", s;
    cin >> s;

    cout << sa[n] << "\n";

    for (char c : s) {
        if (c == 'R') {
            inr = -inr;
        } else {
            r = reg(r + inr);
        }
        int res = (inr == 1 ? sa[r] : sr[r]) % 10;
//        cout << inr << " " << r << " " << res << "\n";
        ans += char(res + '0');
    }

    cout << ans << "\n";
    return 0;


}

详细

Test #1:

score: 100
Accepted
time: 2ms
memory: 6008kb

input:

5 10
5 4 3 2 1
SSSSRSSSSR

output:

10
6446466400

result:

ok 2 tokens

Test #2:

score: 0
Accepted
time: 0ms
memory: 5904kb

input:

1 1
1
R

output:

0
0

result:

ok 2 tokens

Test #3:

score: -100
Wrong Answer
time: 2ms
memory: 5968kb

input:

1000 2000
313 691 343 806 897 516 38 769 391 353 43 55 246 7 65 790 185 362 60 203 642 66 731 64 760 780 266 920 805 48 724 788 730 560 766 491 748 986 439 904 619 749 652 571 617 785 202 588 234 5 717 113 84 823 399 282 269 894 703 745 886 364 258 177 622 621 573 322 487 422 413 58 39 436 543 756 9...

output:

251209
43874381050107890783098123234927898721470309674923058363694547296507416143876969292321676989034983038541030987896725616943010543872367252169438969430743696107694147678721892527816985092189692785010789030107898907692961674507816763438529678381214145296929276765098723496107898943450929092765672...

result:

wrong answer 2nd words differ - expected: '438743810501078907830981232349...6787892107230123090509276327619', found: '438743810501078907830981232349...8903850981470741276343218723619'