#include<bits/stdc++.h> using namespace std; const int N=100010; int a[N],b[N]; int main() { int ans=-1; int total=0,sum=0; int n; cin>>n>>sum; sum=sum100; for(int i=1;i<=n;i++) { int v,p; cin>>v>>p; int now=vp; total+=now; //cout<<total; // cout<<total<<now<<endl; if(total>sum) { ans=i; break; } } cout<<ans; return 0; }