QOJ.ac
QOJ
| ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
|---|---|---|---|---|---|---|---|---|---|
| #413646 | #5141. Identical Parity | huangbrother | WA | 56ms | 3688kb | C++17 | 911b | 2024-05-17 20:34:37 | 2024-05-17 20:34:38 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define int long long
int a[100010];
int exgcd(int a,int b,int &x,int &y){
if(!b){
x=1,y=0;
return a;
}
int d=exgcd(b,a%b,y,x);
y-=x*(a/b);
return d;
}
signed main(){
int t;
cin>>t;
while(t--){
int n,k;
cin>>n>>k;
if(n%k==0){
if((n/2)%(n/k)==0)cout<<"Yes\n";
else cout<<"No\n";
}else {
int res1=n%k;
int res0=k-res1;
int cnt0=n/2;
int x,y;
int d=exgcd(n/k,n/k+1,x,y);
int mod=(n/k+1)/d;
x=((x*cnt0)%mod+mod)%mod;
int r=cnt0-x*(n/k)/(n/k+1);
int X=(res0-x)/mod*mod+x;
int l=cnt0-X*(n/k)/(n/k+1);
if(r<0||l>res1||x>res0)cout<<"No\n";
else cout<<"Yes\n";
}
}
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 3688kb
input:
3 3 1 4 2 5 3
output:
No Yes Yes
result:
ok 3 token(s): yes count is 2, no count is 1
Test #2:
score: -100
Wrong Answer
time: 56ms
memory: 3616kb
input:
100000 1 1 2 1 2 2 3 1 3 2 3 3 4 1 4 2 4 3 4 4 5 1 5 2 5 3 5 4 5 5 6 1 6 2 6 3 6 4 6 5 6 6 7 1 7 2 7 3 7 4 7 5 7 6 7 7 8 1 8 2 8 3 8 4 8 5 8 6 8 7 8 8 9 1 9 2 9 3 9 4 9 5 9 6 9 7 9 8 9 9 10 1 10 2 10 3 10 4 10 5 10 6 10 7 10 8 10 9 10 10 11 1 11 2 11 3 11 4 11 5 11 6 11 7 11 8 11 9 11 10 11 11 12 1 ...
output:
Yes No Yes No Yes Yes No Yes Yes Yes No No Yes Yes Yes No Yes No No No Yes No No No Yes Yes Yes Yes No Yes No Yes Yes Yes Yes Yes No No No No Yes Yes Yes Yes Yes No Yes No No No No No No No Yes No No No No No Yes Yes Yes Yes Yes Yes No Yes No Yes No Yes Yes Yes Yes Yes Yes Yes No No No No No No Yes ...
result:
wrong answer expected YES, found NO [12th token]