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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#647710#5141. Identical Paritycomp_towels_catWA 7ms3756kbC++174.3kb2024-10-17 15:20:552024-10-17 15:21:00

Judging History

This is the latest submission verdict.

  • [2024-10-17 15:21:00]
  • Judged
  • Verdict: WA
  • Time: 7ms
  • Memory: 3756kb
  • [2024-10-17 15:20:55]
  • Submitted

answer

//#pragma GCC optimize(2)
//#pragma GCC optimize(3,"Ofast","inline")
#include <bits/stdc++.h>

#define FOR(i, j, k) for(int i = (j);i <= (k);i ++)
#define ROF(i, j, k) for(int i = (j);i >= (k);i --)
#define For(i, j, k) for(int i = (j);i < (k);i ++)
#define Rof(i, j, k) for(int i = (j);i > (k);i --)
#define ull unsigned long long
#define int long long
#define PII pair<int,int>
#define ULL unsigned long long
#define db double
#define x first
#define y second
#define sp(x) fixed << setprecision(x)
#define all(x) x.begin(), x.end()
#define unq_all(x) x.erase(unique(all(x)), x.end())
#define M(x) x %= mod, x += mod, x %= mod
#define YES cout << "YES\n"
#define NO cout << "NO\n"
#define Yes cout << "Yes\n"
#define No cout << "No\n"
#define ANS cout << ans << '\n'
#define de(p) cout << #p << ' ' << p << '\n'
#define END(i, n) (i == n ? '\n' : ' ')
#define double long double

#define RED cout << "\033[91m"
#define GREEN cout << "\033[92m"
#define YELLOW cout << "\033[93m"
#define BLUE cout << "\033[94m"
#define MAGENTA cout << "\033[95m"
#define CYAN cout << "\033[96m"
#define RESET cout << "\033[0m"

// 红色
#define DEBUG1(x)                     \
    RED;                              \
    cout << #x << " : " << x << endl; \
    RESET;

// 绿色
#define DEBUG2(x)                     \
    GREEN;                            \
    cout << #x << " : " << x << endl; \
    RESET;

// 蓝色
#define DEBUG3(x)                     \
    BLUE;                             \
    cout << #x << " : " << x << endl; \
    RESET;

// 品红
#define DEBUG4(x)                     \
    MAGENTA;                          \
    cout << #x << " : " << x << endl; \
    RESET;

// 青色
#define DEBUG5(x)                     \
    CYAN;                             \
    cout << #x << " : " << x << endl; \
    RESET;

// 黄色
#define DEBUG6(x)                     \
    YELLOW;                           \
    cout << #x << " : " << x << endl; \
    RESET;


using namespace std;


const int N = 5e5 + 10, M = 1e5 + 10, INF = 1e9, mod = 998244353;

int n, m, k;

int exgcd(int a,int b,int &x,int &y)
{
    if (b == 0)
    {
        x = 1, y = 0;
        return a;
    }
    int d = exgcd(b,a % b,y,x);
    y -= a / b * x;
    return d;
}

int gcd(int a, int b)
{
    return b ? gcd(b,a % b) : a;
}

int lcm(int a, int b)
{
    return a * b / gcd(a,b);
}


void solve()
{
    cin >> n >> k;
//    int odd = (n + 1) / 2;
//    int even = n / 2;
    if (n % k == 0)
    {
        if ((n / 2) % (n / k) == 0) YES;
        else NO;
    }
    else
    {
        int c1 = n % k,v1 = n / k + 1;
        int c2 = k - n % k,v2 = n / k;


        int x,y;

        int d = exgcd(v1,v2,x,y);
        m = n / 2;


        if (m % d == 0)
        {
            //x * v1 + y * v2 = m
            int detx = v1 / d;
            int dety = -v2 / d;
            int t = m / d;
            x *= t,y *= t;
//            cout << x << ' ' << v1 <<' ' << y << ' ' << v2 << ' ' << m << '\n';
            if (x < 0)
            {
                int T = (-x + detx - 1) / detx;
                x += detx * T;
                y += dety * T;
            }
            else
            {
                int T = x / detx;
                x -= detx * T;
                y -= dety * T;
            }
//            DEBUG6(c1)
//            DEBUG6(c2)
//            cout << x << ' ' << v1 <<' ' << y << ' ' << v2 << ' ' << m << '\n';
            if (y > c2)
            {
                detx *= -1,dety *= -1;
//                DEBUG6(detx)
//                DEBUG6(dety)
                int T = (y - c2 + dety - 1) / dety;
                y -= dety * T;
                x -= detx * T;
//                cout << x << ' ' << v1 <<' ' << y << ' ' << v2 << ' ' << m << '\n';
                if (x >= 0 && x <= c1) YES;
                else NO;
            }
            else if (y < 0) NO;
            else YES;
        }
        else
        {
            NO;
        }


    }
}

signed main()
{
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    auto t = clock();
    int T = 1;
    cin >> T;

    while (T--)
    {
        solve();
    }
    auto tt = clock();

//    cout << "Time: " << 1000.0 * (tt - t) / CLOCKS_PER_SEC << "ms" << endl;

    return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 3736kb

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: 7ms
memory: 3756kb

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
NO
YES
YES
YES
NO
YES
NO
YES
YES
YES
NO
NO
NO
NO
YES
YES
YES
NO
YES
NO
YES
NO
YES
YES
YES
NO
NO
NO
NO
NO
YES
YES
YES
YES
NO
YES
NO
NO
NO
NO
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
NO
YES
NO
YES
NO
YES
NO
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
N...

result:

wrong answer expected YES, found NO [12th token]