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 fi first
#define se second
#define pb push_back
#define sz(a) (int)a.size()
#define all(a) a.begin(),a.end()
#define rep(i,n) for(int i=0;i<n;i++)
#define crep(i,x,n) for(int i=x;i<n;i++)
#define drep(i,n) for(int i=n-1;i>=0;i--)
#define vec(...) vector<__VA_ARGS__>
#define _3qplfh5 ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0)
using namespace std;
typedef long long ll;
typedef long double ld;
using pii=pair<int,int>;
using vi=vector<int>;
using vll=vector<long long>;
int main(){
_3qplfh5;
string s;
cin>>s;
int n=sz(s);
int q;
cin>>q;
vec(pii) qry;
rep(_,q){
int l,r;
cin>>l>>r;
l--,r--;
qry.pb({l,r});
}
vi per(n);
rep(i,n){
cin>>per[i];
per[i]--;
}
auto f=[&](int l){
vec(vi) cnt(n,vi(30));
string nes=s;
rep(i,l+1){
nes[per[i]]='.';
}
rep(i,n){
if(i) cnt[i]=cnt[i-1];
if(nes[i]!='.'){
cnt[i][nes[i]-'a']++;
}
}
rep(_,sz(qry)){
int _l,_r;
_l=qry[_].fi;
_r=qry[_].se;
rep(j,26){
if(cnt[_r][j]-(_l==0?0:cnt[_l-1][j])>1){
return false;
}
}
}
return true;
};
// f(1);
int l=-1,r=n-1,c=0;
while(l<=r){
int m=(l+r)>>1;
if(f(m)){
c=m+1;
r=m-1;
}else{
l=m+1;
}
}
cout<<c<<"\n";
//
return 0;
}
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