USACO 2013 November Contest, Bronze Problem 2. Goldilocks and the N Cows

Debugging Help
#1

Problem Info

USACO 2013 November Contest, Bronze
Problem 2. Goldilocks and the N Cows
http://www.usaco.org/index.php?page=viewproblem2&cpid=341

My Work

#include <iostream>
#include <algorithm>
#include <vector>
#include <stack>
#include <queue>
#include <math.h>
#include <set>
#include <map>
#include <string>
#include <tuple>
#include <numeric>
#include <climits>
#include <fstream>
using namespace std;

typedef long long ll;

#define endl "\n"


#define cout fout
#define cin fin



bool comp(pair<ll, bool> e, pair<ll, bool> f) {
    if (e.first == f.first) {
        return e.second;
    }
    return e.first < f.first;
}

void solve()
{
    ifstream fin ("milktemp.in");
    ofstream fout ("milktemp.out");
    
    
    ll n, x, y, z;
    cin >> n >> x >> y >> z;
    
    vector <pair<ll, bool>> points;
    
    for (ll i = 0; i < n; i++) {
        ll a, b;
        cin >> a >> b;

        points.push_back({a, true});
        points.push_back({b, false});
    }
    
    sort(points.begin(), points.end(), comp);
    
    ll prev = 0;
    ll cur = 0;
    
    ll ans = -1;
    for (ll i = 0; i < points.size(); i++) {
        ll temp = 0;
        
        if (points[i].second) {
            cur++;
            
            ll after = n - prev - cur;
            temp = (x * prev) + (y * cur) + (z * after);
            ans = max(ans, temp);
        } else {
            
            ll after = n - prev - cur;
            temp = (x * prev) + (y * cur) + (z * after);
            ans = max(ans, temp);
            
            cur--;
            prev++;
        }
    }
    
    cout << ans << endl;
    
    return;
}


int main()
{
    ll t = 1;
    
    while (t--) {
        solve();
    }
}

I downloaded the test data and got the same output as the official output for test case 2. But the USACO grading server marked it as incorrect.

#2
#3

Thanks, I figured out that the comparator was the problem. But I still need some help.
The correct answer for the second test case is 159, but I got 161 by setting the temperature to 5

Test Data
25 5 7 3
3 6
5 7
3 5
2 6
1 9
2 7
0 9
3 6
0 6
2 6
1 8
7 9
0 2
2 3
5 7
2 9
2 8
7 9
3 6
1 2
3 9
1 9
4 7
4 8
0 5

NVM, I got the problem. Thanks for the help!