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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#281765#5464. Dice GamesamneverWA 1ms3980kbC++142.9kb2023-12-10 18:16:172023-12-10 18:16:18

Judging History

你现在查看的是最新测评结果

  • [2023-12-10 18:16:18]
  • 评测
  • 测评结果:WA
  • 用时:1ms
  • 内存:3980kb
  • [2023-12-10 18:16:17]
  • 提交

answer

#include<bits/stdc++.h>
#define fs(i,x,y) for(int i=(x),_=(y);i<=_;++i)
#define fn(i,x,y) for(int i=(x),_=(y);i>=_;--i)
#define int ll
using namespace std;
typedef long long ll;
typedef double db;

const int N = 1e5 + 7, P = 998244353, iv2 = (P + 1) / 2;
int n;
int cnt[N];
//zhuyi bao longlong

int qw(int a, int b) {
    int ans = 1;
    for (;b;a = (ll)a * a % P, b >>= 1)if (b & 1)ans = (ll)ans * a % P;
    return ans;
}

void pre() {
    int lim = 2;
    fs(i, 0, 30) {
        int tp = n % lim;
        cnt[i] = (n - tp) / 2;
        if ((tp >> i) & 1) {
            cnt[i] += (n % (lim >> 1)) + 1;
        }
        // cout << i << ' ' << cnt[i] << endl;
        cnt[i] *= (lim >> 1);
        lim <<= 1;
    }
    // fs(i, 0, 30)cout << cnt[i] << ' ';
    // cout << endl;
}

bool calc(int x) {
    ll tp = 0;
    fn(i, 30, 0) {
        if ((x >> i) & 1) {
            tp -= cnt[i];
        }
        else tp += cnt[i];
    }
    return tp > 0;
}

int qry(int l, int r) {
    int ans = l - 1;
    while (l <= r) {
        int mid = (l + r) >> 1;
        if (calc(mid))ans = mid, l = mid + 1;
        else r = mid - 1;
    }
    return ans;
}

int sol(int dig, int l, int pos) {
    if (pos < l)return 0;
    int ans = 0;
    fs(i, dig + 1, 30) {
        ans = (ans + cnt[i] % P * (pos - l + 1) % P) % P;
    }
    ans = (ans - cnt[dig] % P * (pos - l + 1) % P + P) % P;
    int lim = 2;
    fs(i, 0, dig - 1) {
        if ((pos >> i) & 1) {
            ans = (ans + cnt[i] % P * ((lim >> 1) - 1 - (pos % (lim >> 1))) % P) % P;
            // cout << ((lim >> 1) - 1 - (pos % (lim >> 1))) << " " << "jishu" << "///";
        }
        else {
            ans = (ans + cnt[i] % P * ((pos % (lim >> 1)) + 1) % P) % P;
            // cout << pos % (lim >> 1) + 1 << ' ' << "oushu" << "///";
        }
        lim <<= 1;
    }
    return ans;
}

void solve() {
    scanf("%lld", &n);
    --n;
    pre();
    // fs(i, 0, n) {
    //     cout << calc(i) << ' ' << i << endl;
    // }
    int ans = n * (n + 1) % P * (n + 2) % P * iv2 % P;
    // cout << ans << endl;
    // cout << "HHH" << endl;
    for (int i = 0;;++i) {
        int l = (1ll << i), r = min((1ll << (i + 1)) - 1, n);
        if (l > n)break;
        // cout << "HHH" << endl;
        int pos = qry(l, r);
        // cout << pos << endl;
        // cout << "///";
        // cout << pos << ' ' << sol(i, l, pos) << endl;
        ans += sol(i, l, pos);
        // cout << endl;
        // ans += (l + r) * (r - l + 1) % P * iv2 % P * n % P;
    }
    // cout << ans << endl;
    // cout << "abs" << endl;
    printf("%lld\n", ans * qw(n + 1, P - 2) % P * qw(n + 1, P - 2) % P);
}

signed main() {
    // freopen("in", "r", stdin);
    // freopen("hhout", "w", stdout);
    // cout << 6 << endl;
    // fs(i, 5000, 5005)cout << i << endl;
    int T = 0;
    scanf("%lld", &T);
    while (T--) {
        solve();
    }
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 3980kb

input:

4
1
2
3
4

output:

0
249561089
776412276
2

result:

ok 4 number(s): "0 249561089 776412276 2"

Test #2:

score: -100
Wrong Answer
time: 1ms
memory: 3932kb

input:

100
119
75
29
10
17
29
449
71
72
12
79
117
83
80
35
272
105
497
346
287
362
140
297
167
111
419
210
212
170
413
373
210
196
39
1
101
258
496
333
293
392
2
187
431
157
342
436
106
449
136
378
243
357
325
237
254
22
292
62
435
18
446
471
18
42
377
181
350
19
389
212
58
45
70
52
63
107
71
66
355
381
30...

output:

645006489
296012775
400009943
299473312
221064504
400009943
60548260
896063466
573066250
471393174
723451295
531171954
143020402
389315350
560646647
43176836
269095960
284396636
191400715
269215551
967774080
745220060
584864173
5941827
724073586
701650152
262576881
417830609
833275086
916357319
1435...

result:

wrong answer 11th numbers differ - expected: '175624519', found: '723451295'