include[HTML_REMOVED]
include[HTML_REMOVED]
include[HTML_REMOVED]
using namespace std;
const int N=1e5+10;
int cnt[N];
int main()
{
int n,k,s;
int sum=0;
cin >> n >> k >> s;
while(n–)
{
int a,b;
cin >> a >> b;
if(a>=175)
{
if(b>=s)
{
sum;
}
else
{
cnt[a];
}
}
}
for(int i=175;i<=290;i++)
{
sum+=min(cnt[i],k);
}
cout << sum;
return 0;
}