QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#690287 | #5141. Identical Parity | IsacBieber# | WA | 3ms | 3704kb | C++23 | 1.5kb | 2024-10-30 21:26:48 | 2024-10-30 21:26:49 |
Judging History
answer
#include <bits/stdc++.h>
// #include<bits/extc++.h>
#define int long long
#define endl '\n'
#define eps 1e-7
#define pb push_back
#define eb emplace_back
#define debug(x) cerr << #x << ": " << x << '\n';
// using namespace __gnu_pbds;
using namespace std;
using ll = long long;
using ld = long double;
using pll = pair<ll, ll>;
using pii = pair<int, int>;
using ull = unsigned long long;
const int N = 1e6 + 5, MOD = 1e9 + 7;
mt19937_64 rnd(chrono::steady_clock::now().time_since_epoch().count());
int n, k;
int exgcd(int a, int b, int& x, int& y) {
if (!b) {
x = 1, y = 0;
return a;
}
int d = exgcd(b, a % b, x,y);
int t=x;
x=y;
y =t- (a / b) * y;
return d;
}
void isac()
{
cin>>n>>k;
if(n == 1) {
std::cout << "Yes\n";
return;
}
if(k == 1) {
std::cout << "No\n";
return;
}
int l1 = n/k, c1 = k - (n % k), l2 = n/k + 1, c2 = n % k;
int cnt = n/2;
if(l1 % 2 == 0) swap(l1, l2), swap(c1, c2);
int x, y;
exgcd(l1, l2, x, y);
int l = std::max(0ll, ((cnt * x -c1) + l2 - 1)/l2);int r = std::min((cnt * x)/l2, (c2 - cnt*y)/ l1);
if(l > r) {
std::cout << "No\n";
}
else std::cout << "Yes\n";
}
signed main(void)
{
ios::sync_with_stdio(0);
cin.tie(0), cout.tie(0);
int T = 1;
cin >> T;
while (T--) isac();
return 0;
}
/*
Zena youth together.
Such a pretty name.
There will be a long story.
Time will tell all.
*/
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 3704kb
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: 3ms
memory: 3624kb
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 No 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 No No Yes No Yes Yes Yes Yes Yes No Yes No Yes Yes Yes Yes Yes Yes Yes Yes No Yes No No Yes Yes Yes Yes Yes Yes Yes Yes No Yes N...
result:
wrong answer expected YES, found NO [17th token]