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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
#528632#8520. Xor PartitionsdeepthoughtWA 1ms4412kbC++231.8kb2024-08-23 17:26:212024-08-23 17:26:21

Judging History

你现在查看的是最新测评结果

  • [2024-08-23 17:26:21]
  • 评测
  • 测评结果:WA
  • 用时:1ms
  • 内存:4412kb
  • [2024-08-23 17:26:21]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
#define ll long long
const int MAXN = 3e5+5;
ll MOD = 1e9 + 7;
ll bitsum[MAXN][63][2];
int32_t main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int n;
    cin >> n;
    vector <ll> pow2(63, 0);
    pow2[0] = 1;
    for(int i = 1; i <= 62; i++) pow2[i] = pow2[i - 1] * 2;
    vector <ll> a(n + 1);
    vector <ll> xp(n + 1, 0);
    for(int i = 1; i <= n; i++){
        cin >> a[i];
        xp[i] = a[i] ^ xp[i - 1];
    } 
    vector <ll> dp(n + 1, 0);
    dp[1] = a[1];
    for(int j = 0; j < 63; j++) {
        if(pow2[j] & xp[1]) {
            bitsum[1][j][1] = (bitsum[1][j][1] + dp[1]) % MOD;
        }
        else {
            bitsum[1][j][0] = (bitsum[1][j][0] + dp[1]) % MOD;
        }
    }

    for(int i = 2; i <= n; i++) {
        for(int j = 0; j < 63; j++) {
            if(pow2[j] & xp[i]) {
                dp[i] = (dp[i] + bitsum[i - 1][j][0] * pow2[j]) % MOD;
                // cout << j <<  " " << bitsum[i - 1][j][0] << endl;                
            }
            else {
                dp[i] = (dp[i] + bitsum[i - 1][j][1] * pow2[j]) % MOD;
                // cout << j << " " << bitsum[i - 1][j][1] << endl;                
            }

        }
        dp[i] = (dp[i] + xp[i]) % MOD;
        for(int j = 0; j < 63; j++) {
            bitsum[i][j][1] = bitsum[i - 1][j][1];
            bitsum[i][j][0] = bitsum[i - 1][j][0];
            if(pow2[j] & xp[i]) {
                bitsum[i][j][1] = (bitsum[i][j][1] + dp[i]) % MOD;
            }
            else {
                bitsum[i][j][0] = (bitsum[i][j][0] + dp[i]) % MOD;
            }
        }
        // cout << i << " " << dp[i] << endl;
    }

    cout << dp[n] << endl;
}



/*



*/

详细

Test #1:

score: 100
Accepted
time: 0ms
memory: 3656kb

input:

4
7 3 1 2

output:

170

result:

ok 1 number(s): "170"

Test #2:

score: 0
Accepted
time: 0ms
memory: 3652kb

input:

1
0

output:

0

result:

ok 1 number(s): "0"

Test #3:

score: 0
Accepted
time: 0ms
memory: 3588kb

input:

1
1

output:

1

result:

ok 1 number(s): "1"

Test #4:

score: 0
Accepted
time: 0ms
memory: 3788kb

input:

3
1 2 3

output:

16

result:

ok 1 number(s): "16"

Test #5:

score: 0
Accepted
time: 0ms
memory: 3788kb

input:

4
0 1 0 1

output:

2

result:

ok 1 number(s): "2"

Test #6:

score: -100
Wrong Answer
time: 1ms
memory: 4412kb

input:

562
918479109239293921 960173570446350728 374394588863436385 418106819278123099 473761712658352147 662782574081105364 824954323015093862 827581845536521847 184394794881199801 820907621998888642 606529830885621237 961790689782125501 582742201855597942 337901250755571075 287706594894797714 18578215893...

output:

196095239

result:

wrong answer 1st numbers differ - expected: '641941658', found: '196095239'