This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
#define T ll tt ; cin>>tt ; while(tt--)
#define fast ios::sync_with_stdio(NULL); cin.tie(0); cout.tie(0);
#define endl '\n'
#define yes void (cout << "YES" << endl)
#define no void (cout << "NO" << endl)
#define pb push_back
#define F first
#define S second
#define ld long double
#define fixed(g) fixed<<setprecision(g)
#define ll long long
using namespace std;
const ll N = 2e6 + 9 ;
const ll oo = 1e18 + 7 ;
ll n , m , k , x , y , z , ind , ans , a[N] , b[N] , mn , sz;
string s;
vector< ll >v , vind;
bool ff , is , vis[N] ;
multiset<pair<ll , ll> >st ;
int main(){
fast
cin >> n >> m ;
for(ll i=1 ; i<=n ; i++){
cin >> a[i] >> b[i] ;
}
while(m--){
cin >> x >> y ;
if(x==y)cout<<0<<endl ;
else{
if(a[y]<=b[x] && b[x]<=b[y])cout<<1<<endl ;
else cout<<"impossible"<<endl;
}
}
return 0 ;
}
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