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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
#347668#6753. Medianswtz2333AC ✓327ms120456kbC++171.7kb2024-03-09 14:45:542024-03-09 14:45:55

Judging History

你现在查看的是最新测评结果

  • [2024-03-09 14:45:55]
  • 评测
  • 测评结果：AC
  • 用时：327ms
  • 内存：120456kb
查看
  • [2024-03-09 14:45:54]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const int mo = 998244353;
const int P = 1e9 + 7;
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n;
    cin >> n;
    vector<int> p(n + 1),pre(n + 1),nxt(n + 1);
    for (int i = 1; i <= n;i ++) {
        p[i] = i;
        pre[i] = i - 1;
        nxt[i] = i + 1;
    }
    int a;
    cin >> a;
    for(int i = 1;i <= n;i ++) {
        int x = (1ll * a * mo + P) % (P + 2);
        swap(p[i],p[(x % i) + 1]); 
        a = x;
    }
    // vector<int> ans(n + 1);
    int last = (n + 1) / 2;
    int ans;
    int Ans = last;
    for(int i = n - 1;i >= 1;i --) {
        if(p[i + 1] == last) {
            if(i & 1) {
                int x = last;
                x = nxt[x];
                ans = x;
            }else {
                int x = last;
                x = pre[x];
                ans = x; 
            }
        }else if(p[i + 1] < last) {
            if(i & 1) {
                int x = last;
                x = nxt[x];
                ans = x;
            }else ans = last;
        }else {
            if(i & 1) {
                ans = last;
            }else {
                int x = last;
                x = pre[x];
                ans = x; 
            }
        }
        int x = p[i + 1];
        if(pre[x] >= 0)nxt[pre[x]] = nxt[x];
        if(nxt[x] <= n)pre[nxt[x]] = pre[x];
        pre[x] = nxt[x] = -1;
        Ans = (1ll * Ans * 19 % mo + ans) % mo;
        last = ans;
    }
    cout << (1ll * Ans * 19) % mo << endl;
}


// n / 20210926 <= k


/// 1 2 3 4 5 6 7 8

// 14 5 2 2 1 1 1 1

// 13 4 1 1 0 0 0 0

// 12 3 0 0 0 0 0 0

//
源文件, 语言: C++17

详细

Test #1:

score: 100
Accepted
time: 0ms
memory: 3668kb

input:

5 0

output:

7703113

result:

ok 1 number(s): "7703113"

Test #2:

score: 0
Accepted
time: 0ms
memory: 3632kb

input:

5 1

output:

7840977

result:

ok 1 number(s): "7840977"

Test #3:

score: 0
Accepted
time: 0ms
memory: 3636kb

input:

2 1361955

output:

399

result:

ok 1 number(s): "399"

Test #4:

score: 0
Accepted
time: 0ms
memory: 3576kb

input:

4 207579012

output:

274740

result:

ok 1 number(s): "274740"

Test #5:

score: 0
Accepted
time: 0ms
memory: 3672kb

input:

8 628145516

output:

783389330

result:

ok 1 number(s): "783389330"

Test #6:

score: 0
Accepted
time: 0ms
memory: 3524kb

input:

16 376140462

output:

772072366

result:

ok 1 number(s): "772072366"

Test #7:

score: 0
Accepted
time: 0ms
memory: 3576kb

input:

32 883515280

output:

822906393

result:

ok 1 number(s): "822906393"

Test #8:

score: 0
Accepted
time: 0ms
memory: 3636kb

input:

64 186969585

output:

536948870

result:

ok 1 number(s): "536948870"

Test #9:

score: 0
Accepted
time: 0ms
memory: 3576kb

input:

128 762888635

output:

914896632

result:

ok 1 number(s): "914896632"

Test #10:

score: 0
Accepted
time: 0ms
memory: 3576kb

input:

256 326402539

output:

816864808

result:

ok 1 number(s): "816864808"

Test #11:

score: 0
Accepted
time: 0ms
memory: 3844kb

input:

512 98152102

output:

792934555

result:

ok 1 number(s): "792934555"

Test #12:

score: 0
Accepted
time: 0ms
memory: 3584kb

input:

1024 158176572

output:

187304261

result:

ok 1 number(s): "187304261"

Test #13:

score: 0
Accepted
time: 0ms
memory: 3608kb

input:

2048 61402883

output:

881629018

result:

ok 1 number(s): "881629018"

Test #14:

score: 0
Accepted
time: 0ms
memory: 3880kb

input:

4096 127860889

output:

926052991

result:

ok 1 number(s): "926052991"

Test #15:

score: 0
Accepted
time: 0ms
memory: 3620kb

input:

8192 9580638

output:

18767865

result:

ok 1 number(s): "18767865"

Test #16:

score: 0
Accepted
time: 1ms
memory: 3732kb

input:

16384 570870044

output:

676635475

result:

ok 1 number(s): "676635475"

Test #17:

score: 0
Accepted
time: 1ms
memory: 3868kb

input:

32768 646139319

output:

121314798

result:

ok 1 number(s): "121314798"

Test #18:

score: 0
Accepted
time: 2ms
memory: 3836kb

input:

65536 178509022

output:

518784793

result:

ok 1 number(s): "518784793"

Test #19:

score: 0
Accepted
time: 3ms
memory: 4652kb

input:

131072 484027666

output:

783563468

result:

ok 1 number(s): "783563468"

Test #20:

score: 0
Accepted
time: 5ms
memory: 6212kb

input:

262144 61263304

output:

560815556

result:

ok 1 number(s): "560815556"

Test #21:

score: 0
Accepted
time: 10ms
memory: 9196kb

input:

524288 841082555

output:

478037004

result:

ok 1 number(s): "478037004"

Test #22:

score: 0
Accepted
time: 16ms
memory: 15684kb

input:

1048576 558212774

output:

145045199

result:

ok 1 number(s): "145045199"

Test #23:

score: 0
Accepted
time: 34ms
memory: 27872kb

input:

2097152 940563715

output:

267114566

result:

ok 1 number(s): "267114566"

Test #24:

score: 0
Accepted
time: 80ms
memory: 52480kb

input:

4194304 26389620

output:

535216368

result:

ok 1 number(s): "535216368"

Test #25:

score: 0
Accepted
time: 244ms
memory: 101332kb

input:

8388608 579113528

output:

926081338

result:

ok 1 number(s): "926081338"

Test #26:

score: 0
Accepted
time: 287ms
memory: 120216kb

input:

10000000 496147999

output:

872799419

result:

ok 1 number(s): "872799419"

Test #27:

score: 0
Accepted
time: 312ms
memory: 120304kb

input:

10000000 925801172

output:

676521567

result:

ok 1 number(s): "676521567"

Test #28:

score: 0
Accepted
time: 299ms
memory: 120348kb

input:

10000000 837151740

output:

617759049

result:

ok 1 number(s): "617759049"

Test #29:

score: 0
Accepted
time: 327ms
memory: 120392kb

input:

10000000 70301164

output:

413391579

result:

ok 1 number(s): "413391579"

Test #30:

score: 0
Accepted
time: 285ms
memory: 120300kb

input:

10000000 656585275

output:

505441893

result:

ok 1 number(s): "505441893"

Test #31:

score: 0
Accepted
time: 302ms
memory: 120456kb

input:

10000000 285845005

output:

465986348

result:

ok 1 number(s): "465986348"

Test #32:

score: 0
Accepted
time: 301ms
memory: 120300kb

input:

10000000 902071050

output:

964328151

result:

ok 1 number(s): "964328151"
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