func_code_string: #include <bits/stdc++.h>   using namespace std;   const int maxn = 200005;   string s, t;   int pre[maxn][26], pos[26];   int f[maxn];   int g[maxn];   void solve(string &s, string &t, int f[]) {     for (int i = 0; i < 26; i++) pos[i] = -1;     int n = t.size(), m = s.size();     for (int i = 0; i <= n; i++) {       for (int j = 0; j < 26; j++) {         pre[i][j] = pos[j];       }       if (i < n) pos[t[i] -  a ] = i;     }     int len = 0;     for (int i = 0; i < m; i++) {       if (len < n && s[i] == t[len]) {         f[i] = ++len;       } else {         f[i] = pre[len][s[i] -  a ] + 1;       }     }   }   int main() {     ios::sync_with_stdio(false);     cin.tie(0);     cout.tie(0);     cin >> s >> t;     solve(s, t, f);     reverse(s.begin(), s.end());     reverse(t.begin(), t.end());     solve(s, t, g);     bool ok = true;     int m = s.size(), n = t.size();     for (int i = 0; i < m; i++) {       if (f[i] + g[m - i - 1] - 1 < n) {         ok = false;         break;       }     }     if (ok)       cout <<  Yes n ;     else       cout <<  No n ;     return 0;   }   