Submission #1535544

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Source Code Expand

#include <bits/stdc++.h>
#define F first
#define S second
using namespace std;
typedef long double ll;
typedef vector<ll> vi;
typedef vector<vi> vvi;
typedef vector<vvi> vvvi;
typedef pair<int, int> ii;
typedef vector<ii> vii;


int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    int n;
    cin >> n;
    int a1, a2;
    cin >> a1 >> a2;
    ll atotal = a1, btotal = a2;
    for (int i = 1; i < n; ++i) {
        int a, b;
        cin >> a >> b;
        ll low = 0, high = 1e18, cnt = 100;
        while (cnt--) {
            ll mid = floor((low+high)/2);
            ll a1 = a*mid, b1 = b*mid;
            if (a1 >= atotal && b1 >= btotal) high = mid;
            else low = mid+1;
        }
        atotal = a*high, btotal = b*high;
    }
    cout << fixed << setprecision(0);
    cout << atotal+btotal << "\n";
    return 0;
}

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