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QOJ
ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#662820 | #5141. Identical Parity | youthpaul | WA | 12ms | 3616kb | C++20 | 1.7kb | 2024-10-21 10:53:56 | 2024-10-21 10:53:57 |
Judging History
answer
#include<bits/stdc++.h>
#define fore(i,l,r) for(int i=(int)(l);i<(int)(r);++i)
#define fi first
#define se second
#define endl '\n'
#define ull unsigned long long
#define ALL(v) v.begin(), v.end()
#define Debug(x, ed) std::cerr << #x << " = " << x << ed;
const int INF=0x3f3f3f3f;
const long long INFLL=1e18;
typedef long long ll;
ll exgcd(ll a, ll b, ll& x, ll& y){
if(!b) {
x = 1;
y = 0;
return a;
}
ll d = exgcd(b, a % b, y, x);
y -= a / b * x;
return d;
}
int main(){
std::ios::sync_with_stdio(false);
std::cin.tie(nullptr);
std::cout.tie(nullptr);
int t;
std::cin >> t;
// int T = t;
// int tot = 0;
while(t--){
int n, k;
std::cin >> n >> k;
ll x = 0, y = 0;
ll a = n / k, b = (n + k - 1) / k;
ll c = n / 2;
// ++tot;
// if(T > 100 && tot == 125) std::cout << "---> " << n << ' ' << k << endl;
// if(T > 100) continue;
if(a == b){
std::cout << (c % a == 0 ? "Yes" : "No") << endl;
continue;
}
// if((c - (a + 1) * (n % k) + a - 1) / a <= k - n % k) std::cout << "Yes\n";
// else std::cout << "No\n";
ll l = (c - (a + 1) * (n % k) + a - 1) / a;
// std::cerr << l << endl;
ll d = exgcd(a, b, x, y);
x = (x * c % b + b) % b;
// std::cerr << x << endl;
ll m = (l - x + b - 1) / b;
x = x + b * m;
// y = (c - x * a) / b;
// std::cerr << x << ' ' << y << endl;
if(x <= std::min(c / a, ((ll)k - n % k))) std::cout << "Yes\n";
else std::cout << "No\n";
}
return 0;
}
詳細信息
Test #1:
score: 100
Accepted
time: 0ms
memory: 3616kb
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: 12ms
memory: 3560kb
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 No 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 No Yes Yes Yes Yes Yes Yes Yes Yes No Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes...
result:
wrong answer expected NO, found YES [197th token]