QOJ.ac

QOJ

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
#710245#5464. Dice Game123456zmy#WA 1ms3768kbC++171.5kb2024-11-04 19:10:412024-11-04 19:10:41

Judging History

你现在查看的是最新测评结果

  • [2024-11-04 19:10:41]
  • 评测
  • 测评结果:WA
  • 用时:1ms
  • 内存:3768kb
  • [2024-11-04 19:10:41]
  • 提交

answer

#include<bits/stdc++.h>
#define int long long
#define mod 998244353
using namespace std;
#define abs(x) (x>=0?x:-x)
int qpow(int i,int j){return j?j&1?qpow(i*i%mod,j>>1)*i%mod:qpow(i*i%mod,j>>1):1;}
signed main()
{
    int t;
    scanf("%lld",&t);
    while(t--)
    {
        int n;
        scanf("%lld",&n);
        vector<long long>cnt(31),s(31);
        for(int i=0;i<=30;i++)
        {
            cnt[i]=((n>>i+1)<<i);
            cnt[i]+=max(0ll,n%(2<<i)-(1<<i));
        }
        for(int i=0;i<=30;i++)
        {
            s[i]=cnt[i]*(1<<i);
            if(i)s[i]+=s[i-1];
        }
        long long ans=0;
        function<void(int,int,int)>dfs=[&](int l,int k,long long sum)
        {
            if(k==-1||abs(sum)>s[k])
            {
                // cerr<<l<<k<<sum<<endl;
                ans+=max(0ll,sum%mod*(1<<k+1)%mod);
                // if(sum>0)ans+=n*(l+l+(1<<k+1)-1)%mod*(1<<k+1)%mod+sum%mod;
                // else ans+=n*(l+l+(1<<k+1)-1)%mod*(1<<k+1)%mod;
                return;
            }
            dfs(l,k-1,sum+cnt[k]*(1<<k));
            dfs(l+(1<<k),k-1,sum-cnt[k]*(1<<k));
        };
        long long sum0=0,lst=0;
        for(int l=30;l>=0;l--)
        {
            if(lst+(1<<l)<=n)
            {
                dfs(lst,l-1,sum0+cnt[l]*(1<<l));
                lst+=(1<<l);
                sum0-=cnt[l]*(1<<l);
            }
        }
        // printf("%d\n",ans);
        ans+=(n-1)*n/2%mod*n%mod;
        printf("%lld\n",ans%mod*qpow(n*n%mod,mod-2)%mod);
    }
    return 0;
}

詳細信息

Test #1:

score: 100
Accepted
time: 1ms
memory: 3768kb

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: 0ms
memory: 3764kb

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
493886987
400009943
19964893
169252513
400009943
60548260
180598904
227994126
471393174
684743533
531171954
860440606
893428747
555757286
212429333
269095960
284396636
731064371
430533886
87458214
725662616
853502563
131075830
724073586
701650152
262576881
417830609
747785300
916357319
646...

result:

wrong answer 2nd numbers differ - expected: '296012775', found: '493886987'