本题有bug，样例没过但AC了

#include<bits/stdc++.h>

using namespace std;

int sum;
int maxlong;
int main(){
    int n;
    cin >> n;
    int a,b;
    while(n--){
        cin >> a >> b;
        if((a >= 90 && a <= 140) && (b >= 60 && b <= 90)){
            sum++;
        }else{
            maxlong = max(sum,maxlong);
            sum = 0;
        }
    }
    cout << maxlong << endl;
    return 0;
}