QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#757150 | #5141. Identical Parity | huanyizhiyuan | WA | 9ms | 3628kb | C++20 | 1.5kb | 2024-11-17 00:57:07 | 2024-11-17 00:57:07 |
Judging History
answer
#include<bits/stdc++.h>
#define i64 long long
#define int i64
using PII = std::pair<int,int>;
using TIII = std::tuple<int,int,int>;
constexpr int mod = 1e9+7;
constexpr int inf = 1e9+5;
int n,m,k;
void solve()
{
std::cin >> n >> k;
if(n == k)
{
std::cout << "YES\n";
return ;
}
if(k % 2 == 0)
{
std::cout << "YES\n";
return ;
}
// 1 2 3 4 5
// 1 2 3 5 4
// 1 3 2 5
if(n & 1)
{
// 奇数和偶数的个数。
int odd = (n + 1) / 2;
int even = n / 2;
// 一定需要多少个奇数聚集在一起。
int need = (k + 1) / 2;
// 最多可以分成多少段?
int num = n / k;
if(num * need <= odd)
std::cout << "YES\n";
else
std::cout << "NO\n";
}
else
{
// 奇数和偶数的个数。
int odd = n / 2;
int even = n / 2;
// 一定需要多少个奇数聚集在一起。
int need = (k + 1) / 2;
// 最多可以分成多少段?
int num = n / k;
if(num * need <= odd)
std::cout << "YES\n";
else
std::cout << "NO\n";
}
}
signed main()
{
std::ios::sync_with_stdio(false);
std::cin.tie(nullptr);
std::cout.tie(nullptr);
int T=1;
std::cin>>T;
while(T--)
{
solve();
}
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 3628kb
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: 9ms
memory: 3600kb
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]