Submission #374501

#	Time	Username	Problem	Language	Result	Execution time	Memory
374501		topovik	Euklid (COCI20_euklid)	C++14	20 / 110	1032 ms	35008 KiB

euklid

#include <bits/stdc++.h>
#define f first
#define s second
#define pb push_back

using namespace std;

typedef long long ll;
typedef long double ld;

const ll N = 2e3 + 100;

ll gcd[N][N];

ll f(ll x, ll y)
{
    if (x < y) swap(x, y);
    if (y == 1) return x;
    else return f(x / y, y);
}

int main()
{
    for (ll i = 1; i < N; i++)
        for (ll j = 1; j < N; j++) gcd[i][j] = __gcd(i, j);
    ll t;
    cin >> t;
    while (t--)
    {
        ll x, y;
        cin >> x >> y;
        if (x == y)
        {
            cout << x << " " << x << endl;
            continue;
        }
        if (y == 2)
        {
            cout << x << " " << 2 * x << endl;
            continue;
        }
        if (x == y * y)
        {
            cout << x << " " << x * y << endl;
            continue;
        }
        ll l = -1, r = -1;
        for (ll i = 1; i < N; i++)
            for (ll j = 1; j < N; j++)
              if (gcd[i][j] == 1 && f(i * x, j * x) == y) {l = i * x, r = j * x;break;}
        cout << l << " " << r << endl;
    }
}

• Subtask 1: 4 / 4
• Subtask 2: 8 / 8
• Subtask 3: 8 / 8
• Subtask 4: 0 / 15
• Subtask 5: 0 / 40
• Subtask 6: 0 / 35