Submission #872164

#	Time	Username	Problem	Language	Result	Execution time	Memory
872164		SalihSahin	Euklid (COCI20_euklid)	C++14	4 / 110	2 ms	348 KiB

euklid

#include<bits/stdc++.h>
#define pb push_back
#define mp make_pair
#define int long long 
using namespace std;

const int N = 2e5 + 5;
const int mod = 1e9+7;
const int inf = 1e18 + 10;
const int L = 20 * 20 * 20;

int gcd(int a, int b){
    if(a < b) swap(a, b);
    if(b == 0) return a;
    return gcd(b, a%b);
}

int r(int a, int b){
    if(a < b) swap(a, b);
    if(b == 1) return a;
    return r(a/b, b);
}

int32_t main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int t;
    cin>>t;
    while(t--){
        int g, h;
        cin>>g>>h;
        if(g == h){
            cout<<g<<" "<<g<<endl;
            continue;
        }

        int a = g * (h/g + (h%g ? 1 : 0));
        int b = -1;
        for(int i = g; i <= N; i += g){
            if(gcd(i, a) == g && r(i, a) == h){
                b = i;
                break;
            }
        }

        cout<<a<<" "<<b<<endl;
        //if(b == -1) cout<<"ah be"<<endl;
        //else if(gcd(a, b) == g && r(a, b) == h) cout<<1<<endl;
        //else cout<<0<<endl;

        /*
        for(int i = g; i <= 200; i += g){
            for(int j = i; j <= 200; j += g){
                if(gcd(i, j) == g && r(i, j) == h){
                    cout<<i<<" "<<j<<endl;
                }
            }
        }
        */
    }
    return 0;
}

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