Submission #872175

#	Time	Username	Problem	Language	Result	Execution time	Memory
872175		SalihSahin	Euklid (COCI20_euklid)	C++14	20 / 110	1091 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 = 4e10 + 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;
        int a = g;
        while(h*h > a) a *= h;

        int a1 = 0, a2 = 0;

        for(int i = g; i <= N; i += g){
            //int l = i * h / g * g - g;
            //for(int j = l; j < i * (h + 1); j += g){
                if(gcd(i, a) == g && R(i, a) == h){
                    a1 = i, a2 = a;
                    break;
                }
            //}

            //if(a1 > 0) break;
        }

        cout<<a1<<" "<<a2<<endl;
    }
    
    /*
    vector<pair<int, int> > test;
    for(int i = 100; i < 300; i++){
        for(int j = 2; j < 6; j++){
            test.pb(mp(i, j));
        }
    }

    for(auto itr: test){
        int g = itr.first, h = itr.second;

        int a1 = 0, a2 = 0;

        for(int i = g; i <= N; i += g){
            int l = i * h / g * g - g;
            for(int j = l; j < i * (h + 1); j += g){
                if(gcd(i, j) == g && R(i, j) == h){
                    a1 = i, a2 = j;
                    break;
                }
            }

            if(a1 > 0) break;
        }

        cout<<g<<" "<<h<<" -> "<<a1<<" "<<a2<<endl;
    }
    */
    return 0;
}

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