Alphabet Accumulation

#include <bits/stdc++.h>
using namespace std;
vector<int> z[26][101010];
int ff[101010];
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  int n, m;
  cin >> n >> m;
  string s, t[m];
  cin >> s;
  int res = 0;
  for (int i = 0; i < m; ++i) {
    cin >> t[i];
    vector<int> r(26);
    for (char c : t[i]) r[c-'a']++;
    for (int j = 0; j < 26; ++j) {
      if (!r[j]) ff[i]++;
      else z[j][r[j]].push_back(i);
    }
    if (ff[i] == 26) res++;
  }
  vector<int> r(26);
  for (int i = 0; i < n; ++i) {
    int x = s[i]-'a';
    r[x]++;
    for (int j : z[x][r[x]]) {
      ff[j]++;
      if (ff[j] == 26) res++;
    }
    cout << res << " ";
  }
  cout << endl;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED