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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. #define ll long long
  6. #define ull unsigned ll
  7. #define ld long double
  8. typedef vector<int> vi;
  9. typedef multiset<int> mi;
  10. typedef multiset<ll> mll;
  11. typedef vector<ll> vll;
  12. typedef vector<bool> vb;
  13. typedef vector<string> vs;
  14. typedef set<ll> sll;
  15. typedef vector<vector<int>> _2vi;
  16. typedef vector<vector<ll>> _2vll;
  17. #define all(v) ((v).begin()), ((v).end())
  18. #define sz(v) ((ll)((v).size()))
  19.  
  20. #define vinp(v, n)                \
  21.     for (ull i = 0; i < (n); i++) \
  22.     cin >> (v)[i]
  23. #define printv(v)      \
  24.     for (auto i : (v)) \
  25.     cout << i << " "
  26. #define fr0(i, n) for (ull(i) = 0; (i) < (n); (i)++)
  27. #define fr1(i, n) for (ull(i) = 1; (i) < (n); (i)++)
  28. #define fr(i, x, n) for (ull(i) = (x); (i) < (n); (i)++)
  29. #define _CRT_SECURE_NO_WARNING
  30. const ll MOD = 1000000007;
  31.  
  32. void Bustany() {
  33.     ios_base::sync_with_stdio(false);
  34.     cin.tie(NULL);
  35.     cout.tie(NULL);
  36. #ifndef ONLINE_JUDGE
  37.     freopen("./in.txt", "r", stdin), freopen("./out.txt", "w", stdout);
  38. #endif
  39. }
  40.  
  41. const ll N = 1e5 + 5;
  42. vector<sll> adj(N);
  43. //_2vll adj(N,vll(N));
  44.  
  45. string a, b;
  46. vll v;
  47.  
  48. bool can(ll mid) {
  49.     ll n = a.size();
  50.     vb vis(n, 0);
  51.     for (ll i = 1; i <= mid; i++) {
  52.         vis[v[i]-1]=1;
  53.     }
  54.     ll j=0;
  55.     for(ll i=0;i<a.size();i++){
  56.         if(!vis[i] && a[i]==b[j]){
  57.             j++;
  58.         }
  59.     }
  60.     return j==b.size();
  61. }
  62.  
  63.  
  64. void solve() {
  65.     cin >> a >> b;
  66.     ll n = a.size();
  67.     v.assign(n+1,{});
  68.     fr1(i, n + 1) {
  69.         cin >> v[i];
  70.     }
  71.     ll l = 1, r = n, ans = 0, mid;
  72.     //last valid answer
  73.     while (l <= r) {
  74.         mid = (l + r) / 2;
  75.         if (can(mid)) {
  76.             ans = mid;
  77.             l = mid + 1;
  78.         } else {
  79.             r = mid - 1;
  80.         }
  81.     }
  82.     cout << ans;
  83. }
  84.  
  85. int main() {
  86.     Bustany();
  87.     ll t = 1;
  88. //     cin >> t;
  89.     while (t--) {
  90.         solve();
  91.     }
  92. }
Success #stdin #stdout 0.01s 7788KB
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https://ideone.com/B7IZPh
language:
C++ (gcc 8.3)
created:
5 hours ago
visibility:
public

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