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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 ParityyouthpaulWA 12ms3616kbC++201.7kb2024-10-21 10:53:562024-10-21 10:53:57

Judging History

你现在查看的是最新测评结果

  • [2024-10-21 10:53:57]
  • 评测
  • 测评结果:WA
  • 用时:12ms
  • 内存:3616kb
  • [2024-10-21 10:53:56]
  • 提交

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]