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37 lines (37 loc) · 839 Bytes
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CF_166_A.cpp
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37 lines (37 loc) · 839 Bytes
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#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int main()
{
cin.tie(0);cin.sync_with_stdio(0);
cout.tie(0);cout.sync_with_stdio(0);
int t = 1;
while (t--)
{
int size, rank;
cin>>size>>rank;
vector<pair<int, int>> vec;
for(int i=0; i<size; i++)
{
int e1, e2;
cin>>e1>>e2;
pair<int, int> p1={e1, e2};
vec.push_back(p1);
}
sort(vec.begin(), vec.end());
int e1=0, e2=0;
pair<int, int> ans=vec[size-rank-1];
e1=ans.first;
e2=ans.second;
int count=0;
for(int i=0; i<size; i++)
{
if(vec[i].first==e1 && vec[i].second==e2)
{
count++;
}
}
cout<<count<<endl;
}
return 0;
}