QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#402632#3853. Lines in a gridkevinyang#WA 273ms315724kbC++171.1kb2024-05-01 05:12:272024-05-01 05:12:28

Judging History

你现在查看的是最新测评结果

  • [2024-05-01 05:12:28]
  • 评测
  • 测评结果:WA
  • 用时:273ms
  • 内存:315724kb
  • [2024-05-01 05:12:27]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
#define int long long
const int N = 1e7 + 9;
int phi[N];
void totient() {
  for (int i = 1; i < N; i++) phi[i] = i;
  for (int i = 2; i < N; i++) {
    if (phi[i] == i) {
      for (int j = i; j < N; j += i) phi[j] -= phi[j] / i;
    }
  }
}

int e(int n) {
    if (n % 2 == 0) return 0;
    return phi[(n - 1) / 2];
}

int R2(int n) {
    if (n % 2 == 0) return (n - 1) * phi[n-1];
    if (n % 4 == 1) return (n - 1) * phi[(n - 1) / 2];
    return 0;
}
const int mod = (int)1e6+3;
signed main() {
	cin.tie(nullptr)->sync_with_stdio(false);
	totient();
    vector<int> L(N + 1, 0), L1(N + 1, 0), R1(N + 1, 0);
    L[0] = 0;
    L1[1] = 0;
    R1[1] = 0;
    for (int n = 2; n <= N; n++) {
        R1[n] = R1[n - 1] + 4 * (phi[n - 1] - e(n));
        L1[n] = 2 * L[n - 1] - L1[n - 1] + R2(n);
        L[n] = 2 * L1[n] - L[n - 1] + R1[n];
        R1[n]%=mod;
        L1[n]%=mod;
        L[n]%=mod;
    }
    int q;
    cin >> q;
    while(q--){
    	int x;
    	cin >> x;
    	cout << L[x] << '\n';
    }
    return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 264ms
memory: 315712kb

input:

10
1 2 3 4 5 6 7 8 9 10

output:

0
6
20
62
140
306
536
938
1492
2306

result:

ok 10 lines

Test #2:

score: -100
Wrong Answer
time: 273ms
memory: 315724kb

input:

100
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100

output:

0
6
20
62
140
306
536
938
1492
2306
3296
4722
6460
8830
11568
14946
18900
23926
29544
36510
44388
53586
63648
75674
88948
104374
121032
139966
160636
184466
209944
239050
270588
305478
342480
383370
427020
475830
527280
583338
642900
708798
777912
854022
934604
21071
-888638
-790012
-686394
-574236
...

result:

wrong answer 47th lines differ - expected: '111365', found: '-888638'