题解

#include<bits/stdc++.h>
#define ll long long                                                        //防伪标识
#define MAXN 1005
#define maxn 10005
#define MAXM 10000
#define maxm 1000005
using namespace std;
int n,sum,a,b,num;
int main(){
	cin>>n;
	for(int i = 1;i<=n;i++){
		cin>>a>>b;
		if(90<=a&&a<=140&&60<=b&&b<=90){
            num++;
            
        }
            
        else{
            // cout<<i<<endl;
            sum = max(sum,num);
            num = 0;
            
        } 
	}
	cout<<max(sum,num);
	return 0;
}