1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
#include <iostream>
#include <map>

using namespace std;

int main()
{
    ios_base::sync_with_stdio(0);
    int n;
    cin >> n;
    map<int, int> M1, M2;
    for (int i = 0; i < n; ++i)
    {
        int typ, w, t;
        cin >> typ >> w >> t;
        if (typ == 1)
            ++M1[w - t];
        else
            ++M2[w - t];
    }
    int odp = 0;
    for (map<int, int>::iterator it = M1.begin(); it != M1.end(); ++it)
    {
        int k = it->first;
        odp += min(M1[k], M2[k]);
    }
    cout << odp;
    return 0;
}