QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#756057 | #5141. Identical Parity | shunhualin | WA | 13ms | 3608kb | C++20 | 1.1kb | 2024-11-16 18:51:49 | 2024-11-16 18:51:49 |
Judging History
answer
#include <bits/stdc++.h>
#define int long long
#define endl "\n"
#define ll long long
const int mod = 1e9 + 7;
const int N = 1e5 + 50;
using namespace std;
ll exgcd(ll a, ll b, ll &x, ll &y) {
if (b == 0) {
x = 1;
y = 0;
return a;
}
ll d = exgcd(b, a%b, x, y);
ll t = x;
x = y;
y = t-a/b*y;
return d;
}
void slove(){
ll n, k;
cin>>n>>k;
ll len = n/k;
ll len2 = n/k+1;
ll t2 = n%k;
ll t1 = n-n%k;
ll a = len, b = len2;
ll x, y;
ll c = (n+1)/2;
ll d = exgcd(a, b, x, y);
if (c%d != 0) {
cout<<"No"<<'\n';
} else {
a /= d, b /= d, c /= d;
x *= c, y *= c;
x = (x%b+b)%b;
// ax <= c
// a(x+b*k) <= c
ll k = (c/a-x)/b;
// x+b*k <= t1
ll k2 = (t1-x)/b;
x = min(k, k2) * b + x;
if (x < 0) cout<<"No"<<'\n';
else {
y = (c-a*x)/b;
if (0 <= y && y <= t2) {
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--){
slove();
}
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 3588kb
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: 13ms
memory: 3608kb
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 Yes Yes Yes Yes No Yes No Yes Yes Yes No Yes Yes Yes Yes Yes Yes No Yes Yes Yes Yes Yes Yes Yes No Yes No Yes Yes Yes Yes Yes Yes No Yes No Yes No Yes Yes Yes Yes Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes No Y...
result:
wrong answer expected NO, found YES [31st token]