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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
#802717#8150. XOR SumMaxduanAC ✓46ms8296kbC++232.0kb2024-12-07 14:29:522024-12-07 14:29:53

Judging History

你现在查看的是最新测评结果

  • [2024-12-07 14:29:53]
  • 评测
  • 测评结果:AC
  • 用时:46ms
  • 内存:8296kb
  • [2024-12-07 14:29:52]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define maxn 100005
const int p=1e9+7;
int dp[80][1<<8][20];
int N[80],M[80];
vector<int>h[1<<8];
int fac[maxn],inv[maxn];

int qpow(int a,int b){
    int ans=1;
    int tmp=a;
    while(b){
        if(b&1){
            ans=ans*tmp%p;
        }
        tmp=tmp*tmp%p;
        b>>=1;
    }
    return ans;
}

int C(int a,int b){
    if (a < b) return 0;
    return fac[a]*inv[b]%p*inv[a-b]%p;
}

void solve(){
    
    int n,m,k;cin>>n>>m>>k;
    for(int i=60;i>=0;i--){
        N[i]=(n>>i&1);
        M[i]=(m>>i&1);
    }
    dp[60][0][k]=1;
    int ans=0;
    for(int i=60;i>=0;i--){
        for(int x=0;x<=k;x++){
            int y=k-x;
            int v=x*y;
            for(int cnt=0;cnt<=k;cnt++){
                for(int u=0;u<(1<<8);u++){
                    if(dp[i][u][cnt]==0||u<v)continue;
                    int nxt=(u-v)*2+(i>0?N[i-1]:0);
                    if(nxt>=(1<<8))continue;
                    for(int cnt2=0;cnt2<=cnt;cnt2++){
                        if(M[i]==0&&cnt2!=cnt)continue;
                        if(cnt-cnt2<=y){
                            int tp=C(k-cnt,y-cnt+cnt2)*C(cnt,cnt2)%p;
                            if(i>0){
                                dp[i-1][nxt][cnt2]+=dp[i][u][cnt]*tp%p;
                                if(dp[i-1][nxt][cnt2]>=p)dp[i-1][nxt][cnt2]-=p;
                            }
                            else if(nxt==0){
                                ans+=dp[i][u][cnt]*tp%p;
                            }
                        }
                    }
                }
            }
        }
    }

    cout<<ans%p;
}

signed main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    fac[0]=1;
    for(int i=1;i<maxn;i++){
        fac[i]=fac[i-1]*i%p;
    }
    inv[maxn-1]=qpow(fac[maxn-1],p-2);
    for(int i=maxn-2;i>=0;i--){
        inv[i]=inv[i+1]*(i+1)%p;
    }

    solve();
}

这程序好像有点Bug,我给组数据试试?

詳細信息

Test #1:

score: 100
Accepted
time: 0ms
memory: 6756kb

input:

6 2 3

output:

12

result:

ok 1 number(s): "12"

Test #2:

score: 0
Accepted
time: 2ms
memory: 5392kb

input:

30 6 5

output:

1520

result:

ok 1 number(s): "1520"

Test #3:

score: 0
Accepted
time: 2ms
memory: 7304kb

input:

0 0 1

output:

1

result:

ok 1 number(s): "1"

Test #4:

score: 0
Accepted
time: 2ms
memory: 6564kb

input:

0 0 2

output:

1

result:

ok 1 number(s): "1"

Test #5:

score: 0
Accepted
time: 2ms
memory: 7856kb

input:

0 1145141919 2

output:

145141913

result:

ok 1 number(s): "145141913"

Test #6:

score: 0
Accepted
time: 6ms
memory: 6760kb

input:

0 0 18

output:

1

result:

ok 1 number(s): "1"

Test #7:

score: 0
Accepted
time: 5ms
memory: 5388kb

input:

0 12412414 18

output:

12412415

result:

ok 1 number(s): "12412415"

Test #8:

score: 0
Accepted
time: 11ms
memory: 6832kb

input:

32071009996106 682053093123 12

output:

443207413

result:

ok 1 number(s): "443207413"

Test #9:

score: 0
Accepted
time: 3ms
memory: 8120kb

input:

35533005762427 688386210611 9

output:

0

result:

ok 1 number(s): "0"

Test #10:

score: 0
Accepted
time: 26ms
memory: 6856kb

input:

35533005762427 688386210611 18

output:

132815685

result:

ok 1 number(s): "132815685"

Test #11:

score: 0
Accepted
time: 44ms
memory: 6948kb

input:

12412412412412 549755813887 18

output:

769139144

result:

ok 1 number(s): "769139144"

Test #12:

score: 0
Accepted
time: 23ms
memory: 7196kb

input:

12412412412412 549755813887 17

output:

256540093

result:

ok 1 number(s): "256540093"

Test #13:

score: 0
Accepted
time: 14ms
memory: 6868kb

input:

12412412412412 549755813887 15

output:

661919152

result:

ok 1 number(s): "661919152"

Test #14:

score: 0
Accepted
time: 10ms
memory: 7632kb

input:

8213830533897 180838478436 12

output:

960275439

result:

ok 1 number(s): "960275439"

Test #15:

score: 0
Accepted
time: 24ms
memory: 7092kb

input:

8213830533897 180838478436 18

output:

794870059

result:

ok 1 number(s): "794870059"

Test #16:

score: 0
Accepted
time: 4ms
memory: 7812kb

input:

56737445336495 759179417237 12

output:

0

result:

ok 1 number(s): "0"

Test #17:

score: 0
Accepted
time: 27ms
memory: 6888kb

input:

56737445336495 759179417237 18

output:

302105482

result:

ok 1 number(s): "302105482"

Test #18:

score: 0
Accepted
time: 10ms
memory: 6984kb

input:

56737445336495 759179417237 15

output:

0

result:

ok 1 number(s): "0"

Test #19:

score: 0
Accepted
time: 6ms
memory: 6796kb

input:

12412412412412 274877906944 18

output:

430003400

result:

ok 1 number(s): "430003400"

Test #20:

score: 0
Accepted
time: 13ms
memory: 7060kb

input:

32412412412412 274877906944 18

output:

657686236

result:

ok 1 number(s): "657686236"

Test #21:

score: 0
Accepted
time: 6ms
memory: 8296kb

input:

562949953421311 549755813887 18

output:

0

result:

ok 1 number(s): "0"

Test #22:

score: 0
Accepted
time: 6ms
memory: 5340kb

input:

985162418487295 549755813887 18

output:

0

result:

ok 1 number(s): "0"

Test #23:

score: 0
Accepted
time: 6ms
memory: 7052kb

input:

985162418487295 962072674303 18

output:

0

result:

ok 1 number(s): "0"

Test #24:

score: 0
Accepted
time: 46ms
memory: 7972kb

input:

35184372088831 962072674303 18

output:

665848241

result:

ok 1 number(s): "665848241"

Extra Test:

score: 0
Extra Test Passed