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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#648890#5407. 基础图论练习题little_pinkpig0 8ms7968kbC++142.3kb2024-10-17 20:51:172024-10-17 20:51:17

Judging History

你现在查看的是最新测评结果

  • [2024-10-17 20:51:17]
  • 评测
  • 测评结果:0
  • 用时:8ms
  • 内存:7968kb
  • [2024-10-17 20:51:17]
  • 提交

answer

#include<bits/stdc++.h>
#define MAXN (5005)
#define ll long long
using namespace std;
const int mod=1000000007;
void File()
{
    freopen(".in","r",stdin);
    freopen(".out","w",stdout);
}
template<typename type>
void read(type &x)
{
    bool f=0;char ch=0;x=0;
    while(ch<'0'||ch>'9'){f|=!(ch^'-');ch=getchar();}
    while(ch>='0'&&ch<='9'){x=(x<<3)+(x<<1)+(ch^48);ch=getchar();}
    x=f?-x:x;
}
template<typename type,typename... Args>
void read(type &x,Args &... args)
{
    read(x);
    read(args...);
}
bool vis[MAXN][MAXN];
char str[MAXN];
int test,n,s,t,scnt,pw,ans;
int deg[MAXN],sum[MAXN],pre[MAXN][MAXN],posl[MAXN],posr[MAXN];
void solve()
{
    read(n);
    for(int i=1;i<=n;i++) for(int j=1;j<=n;j++) vis[i][j]=0,pre[i][j]=0;
    for(int i=0;i<=n;i++) posl[i]=posr[i]=0;
    for(int i=2,m;i<=n;i++)
    {
        scanf("%s",str+1);
        m=(i+2)>>1;
        for(int j=1,x;j<=m;j++)
        {
            x=isdigit(str[j])?(str[j]^48):(str[j]-'A'+10);
            for(int k=0,p;k<4;k++)
            {
                p=(j<<2)+k-3;
                if(p>=i) break;
                if((x>>k)&1) vis[i][p]=1;
                else vis[p][i]=1;
            }
        }
    }
    for(int i=1;i<=n;i++) deg[i]=0;
    for(int i=1;i<=n;i++) for(int j=1;j<=n;j++) deg[i]+=vis[i][j];
    for(int i=1;i<=n;i++) sum[i]=deg[i];
    sort(sum+1,sum+n+1);
    scnt=0;
    for(int i=1;i<=n;i++)
    {
        sum[i]+=sum[i-1];
        if(sum[i]==i*(i-1)/2) ++scnt;
    }
    for(int l=1,x,y;l<=n;l++)
    {
        x=y=scnt;
        for(int r=l;r<n;r++)
        {
            x+=(sum[r]-1==r*(r-1)/2)-(sum[r]==r*(r-1)/2);
            y+=(sum[r]+1==r*(r-1)/2)-(sum[r]==r*(r-1)/2);
            pre[l][r+1]=x,pre[r+1][l]=x;
        }
    }
    for(int i=n;i;i--) posl[sum[i]-sum[i-1]]=i;
    for(int i=1;i<=n;i++) posr[sum[i]-sum[i-1]]=i;
    pw=1,ans=0;
    for(int i=1,x,y,res;i<=n;i++)
    {
        for(int j=1;j<i;j++)
        {
            x=i,y=j;
            if(vis[y][x]) swap(x,y);
            res=(deg[x]==deg[y]+1)?scnt:pre[posl[deg[x]]][posr[deg[y]]];
            ans=(ans+1ll*pw*res)%mod;
            pw=2ll*pw%mod;
        }
    }
    printf("%d\n",ans);
}
int main()
{
#ifndef ONLINE_JUDGE
    File();
#endif
    read(test);
    for(int i=1;i<=test;i++) solve();
}

Details

Tip: Click on the bar to expand more detailed information

Subtask #1:

score: 0
Wrong Answer

Test #1:

score: 0
Wrong Answer
time: 8ms
memory: 7968kb

input:

10000
100
1
2
2
8
C0
F0
27
78
AE1
C01
511
D87
EF20
3873
2742
73D0
DC9B0
FB2A3
9C011
9B4E0
95DC00
A7B980
F43531
6A6245
5347BE0
1A6C8A1
88E46D6
64CF3AE
D25F63C1
C894E4C3
1C0AFD73
EC1C3F9A
087CE17C0
22149A380
B28038AF1
B9CA21C7F
D78F5307C1
49045489A2
72C4DE6FD1
7713F40D05
EEE8878EEC1
310E62812B1
DA9D5B...

output:

281603732
13
289745452
371842543
84
0
1983
2
408916116
268435455
48539584
33951
2
884007997
123
3180692
2523
0
736524379
371842543
2105911
62611
34964
3147841
723738296
502774846
884008013
719476259
719476259
106224
541674263
377591780
64511
7166511
719476259
371842543
120
84
219
6007345
268435455
1...

result:

wrong answer 3rd numbers differ - expected: '285212672', found: '289745452'

Subtask #2:

score: 0
Skipped

Dependency #1:

0%

Subtask #3:

score: 0
Skipped

Dependency #1:

0%

Subtask #4:

score: 0
Skipped

Dependency #1:

0%

Subtask #5:

score: 0
Skipped

Dependency #1:

0%