不加高精60，加了90，第六个点过不了，求助！大佬们帮忙看看思路哪里有问题

#include<bits/stdc++.h>
#define int long long
using namespace std;
inline int read(){
    int x = 0 , f = 1 ; char c = getchar() ;
    while( c < '0' || c > '9' ) { if( c == '-' ) f = -1 ; c = getchar() ; } 
    while( c >= '0' && c <= '9' ) { x = x * 10 + c - '0' ; c = getchar() ; } 
    return x * f ;
}
int n;
signed main(){
	n = read();
	int sum = read(), bi = read();
	int ma = 0;
	for(int i = 1; i <= n; i++){
		int a = read(), b = read();
		sum *= a;
		ma = max(ma, a*b);
	}
	cout << max(1, sum/ma);
}