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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#448312 | #8782. Schoolgirls | ucup-team173 | WA | 2ms | 3636kb | C++14 | 2.6kb | 2024-06-19 15:23:08 | 2024-06-19 15:23:09 |
Judging History
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
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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]