QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#448312#8782. Schoolgirlsucup-team173WA 2ms3636kbC++142.6kb2024-06-19 15:23:082024-06-19 15:23:09

Judging History

你现在查看的是最新测评结果

  • [2024-06-19 15:23:09]
  • 评测
  • 测评结果:WA
  • 用时:2ms
  • 内存:3636kb
  • [2024-06-19 15:23:08]
  • 提交

answer

#include<bits/stdc++.h>
#define ll long long
#define pb push_back
#define fi first
#define se second
#define mpr make_pair
// #define int ll
using namespace std;

int mod=1e9+7;
int add(int x,int y){
    x+=y;
    return x>=mod?x-mod:x;
}
int mul(int x,int y){
    return 1ll*x*y%mod;
}
void adto(int&x,int y){
    x+=y;
    if(x>=mod)x-=mod;
}
int qpow(int a,int b){
    int ans=1;
    while(b){
        if(b&1)ans=mul(ans,a);
        a=mul(a,a);
        b>>=1;
    }
    return ans;
}

int isp(int n){
    for(int i=2;i*i<=n;i++){
        if(n%i==0)return 0;
    }
    return 1;
}
const int maxn=4e4+10;
int n,m,k;
int p,g;
int points[maxn];

void solve(){
    cin>>n>>m>>k;
    p=n+1;
    while(!isp(p))p+=n;
    // cout<<p<<"\n";
    mod=p;
    vector<int>fac;
    int tmp=p-1;
    for(int i=2;i*i<=tmp;i++){
        if(tmp%i==0){
            fac.pb(i);
            while(tmp%i==0)tmp/=i;
        }
    }
    if(tmp!=1)fac.pb(tmp);
    for(g=2;;g++){
        int flag=1;
        for(int q:fac){
            if(qpow(g,(p-1)/q)==1){
                flag=0;
                break;
            }
        }
        if(flag)break;
    }
    for(int i=1;i<=n;i++){
        points[i]=qpow(g,(i-1)*(p/n));
    }
    // cout<<"### "<<mod<<" "<<g<<"\n";
    for(int i=n+1;i<=n+m;i++){
        int a,b,c;
        cin>>a>>b>>c;
        points[i]=add(add(points[a],points[c]),mod-points[b]);
    }
    // for(int i=1;i<=n+m;i++){
    //     cout<<points[i]<<" \n"[i==n+m];
    // }
    while(k--){
        int r;
        cin>>r;
        vector<int>id(r);
        int sum=0;
        for(int&i:id){
            cin>>i;
            adto(sum,points[i]);
        }
        sum=mul(sum,qpow(r,mod-2));
        // cout<<"sum "<<sum<<"\n";
        if(n*2/__gcd(n,2)%r!=0){
            cout<<"No\n";
            continue;
        }
        int ap=points[id[0]];
        int et=qpow(g,(p-1)/r);
        vector<int>u;
        u.pb(ap);
        for(int i=1;i<r;i++){
            u.pb(add(mul(add(u.back(),mod-sum),et),sum));
        }
        sort(u.begin(),u.end());
        sort(id.begin(),id.end(),[&](int a,int b){
            return points[a]<points[b];
        });
        int flag=1;
        for(int i=0;i<r;i++){
            if(u[i]!=points[id[i]]){
                flag=0;
                break;
            }
        }
        if(flag){
            cout<<"Yes\n";
        }else cout<<"No\n";
    }
}

signed main(){
    ios::sync_with_stdio(0);
    cin.tie(0),cout.tie(0);
    int t=1;
    // cin>>t;
    while(t--)solve();
    return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 3556kb

input:

3 6 8
1 2 3
3 1 4
5 4 3
3 1 2
4 5 3
4 5 2
6 4 7 6 5 1 2
3 1 3 2
3 1 1 8
4 2 5 6 7
3 2 1 4
3 6 5 9
3 4 7 9
4 1 3 2 8

output:

Yes
Yes
Yes
No
No
No
Yes
No

result:

ok 8 token(s): yes count is 4, no count is 4

Test #2:

score: 0
Accepted
time: 0ms
memory: 3616kb

input:

12 0 1
12 12 11 10 9 8 7 6 5 4 3 2 1

output:

Yes

result:

ok YES

Test #3:

score: -100
Wrong Answer
time: 2ms
memory: 3636kb

input:

3 0 6685
5 1 3 1 2 2
3 1 2 3
5 3 1 3 3 1
4 1 1 1 3
3 3 2 1
5 2 3 2 1 3
6 2 2 3 2 3 1
5 3 1 2 3 2
3 3 3 2
5 3 2 2 2 3
5 2 2 3 3 1
6 3 3 1 3 1 3
6 2 3 3 2 2 1
5 2 2 3 2 2
6 2 3 3 2 1 3
6 2 2 2 2 1 3
3 3 1 2
4 3 2 1 1
5 3 1 3 2 3
4 3 1 1 2
4 2 2 2 3
3 1 2 2
4 2 3 3 1
3 2 2 2
4 1 2 2 3
3 3 3 3
4 1 3 1 3...

output:

No
Yes
No
No
Yes
No
No
No
No
No
No
No
No
No
No
No
Yes
No
No
No
No
No
No
Yes
No
Yes
No
No
No
No
No
No
No
No
No
No
No
No
Yes
No
No
No
No
No
No
No
No
Yes
No
No
No
No
No
Yes
No
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
No
No
No
No
No
No
No
No
No
No
No
No
Yes
No
No
No
No
No
N...

result:

wrong answer expected YES, found NO [107th token]