Submission #869904

#	Time	Username	Problem	Language	Result	Execution time	Memory
869904		NeroZein	Crossing (JOI21_crossing)	C++17	26 / 100	7047 ms	6192 KiB

Main

#include "bits/stdc++.h"
using namespace std;

#ifdef Nero
#include "Deb.h"
#else
#define deb(...)
#endif

int main(){
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  int n;
  cin >> n;
  vector<string> s(3); 
  for (int i = 0; i < 3; ++i) cin >> s[i]; 
  set<string> se;
  auto merge = [&](string a, string b) {
    string ret;
    ret.resize(n); 
    for (int i = 0; i < n; ++i) {
      if (a[i] == b[i]) {
        ret[i] = a[i];
      } else {
        if (a[i] != 'I' && b[i] != 'I') ret[i] = 'I';
        else if (a[i] != 'O' && b[i] != 'O') ret[i] = 'O';
        else if (a[i] != 'J' && b[i] != 'J') ret[i] = 'J';
        else assert(false); 
      }
    }
    return ret;
  };
  for (int i = 0; i < 3; ++i) {
    for (int j = 0; j < 3; ++j) {
      for (int k = 0; k < 3; ++k) {
        se.insert(merge(merge(s[i], s[j]), s[k])); 
      }
    }
  }
  //deb(se) cout << '\n';
  int q;
  cin >> q;
  string t;
  cin >> t;
  cout << (se.count(t) ? "Yes" : "No") << '\n'; 
  while (q--) {
    int l, r;
    cin >> l >> r;
    --l, --r;
    char c;
    cin >> c;
    for (int i = l; i <= r; ++i) {
      t[i] = c;
    }
    cout << (se.count(t) ? "Yes" : "No") << '\n'; 
  }
  return 0;
}

• Subtask 1: 3 / 3
• Subtask 2: 0 / 23
• Subtask 3: 23 / 23
• Subtask 4: 0 / 51