QOJ.ac

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
#647722#5141. Identical Paritycomp_towels_catWA 10ms3804kbC++174.3kb2024-10-17 15:27:422024-10-17 15:27:43

Judging History

你现在查看的是最新测评结果

  • [2024-10-17 15:27:43]
  • 评测
  • 测评结果:WA
  • 用时:10ms
  • 内存:3804kb
  • [2024-10-17 15:27:42]
  • 提交

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 = v2 / d;
            int dety = -v1 / 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)
//            DEBUG6(detx)
//            DEBUG6(dety)
//            cout << x << ' ' << v1 <<' ' << y << ' ' << v2 << ' ' << m << '\n';
            if (y > c2)
            {
                detx *= -1,dety *= -1;

                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 && y >= 0) 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;
}

详细

Test #1:

score: 100
Accepted
time: 0ms
memory: 3676kb

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: 10ms
memory: 3804kb

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 [125th token]