Submission #198278

#	Time	Username	Problem	Language	Result	Execution time	Memory
198278		alrad	Grudanje (COCI19_grudanje)	C++17	70 / 70	489 ms	17072 KiB

grudanje

#include <bits/stdc++.h>

using namespace std;

int main() {
   ios_base :: sync_with_stdio(0);
   cin.tie(0) , cout.tie(0);
   string s;
   cin >> s;
   const int n = (int)s.size();
   int q;
   cin >> q;
   vector<pair<int , int> > sub(q);
   for (int i = 0; i < q; i++) {
      int a , b;
      cin >> a >> b;
      sub[i] = {a , b};
   }
   vector<int> p(n);
   for (int i = 0; i < n; i++) {
      cin >> p[i];
   }
   auto can = [&](int tot) {
      vector<bool> used(n , false);
      for (int i = 0; i < tot; i++) {
         used[p[i]] = true;
      }
      vector<vector<int> > let(n + 1 , vector<int>(26 , 0));
      for (int i = 1; i <= n; i++) {
         if (!used[i]) {
            let[i][int(s[i - 1] - 'a')]++;
         }
         for (int j = 0; j < 26; j++) {
            let[i][j] += let[i - 1][j];
         }
      }
      for (int i = 0; i < q; i++) {
         int L = sub[i].first , R = sub[i].second;
         for (int j = 0; j < 26; j++) {
            if (let[R][j] - let[L - 1][j] >= 2) {
               return false;
            }
         }
      }
      return true;
   };
   int l = 0 , r = n;
   while (l != r) {
      int mid = (l + r) >> 1;
      if (can(mid))
         r = mid;
      else
         l = mid + 1;
   }
   cout << r << '\n';
   return 0;
}

• Subtask 1: 7 / 7
• Subtask 2: 7 / 7
• Subtask 3: 7 / 7
• Subtask 4: 7 / 7
• Subtask 5: 7 / 7
• Subtask 6: 7 / 7
• Subtask 7: 7 / 7
• Subtask 8: 7 / 7
• Subtask 9: 7 / 7
• Subtask 10: 7 / 7