Submission #1208949

#	Time	Username	Problem	Language	Result	Execution time	Memory
1208949		lopkus	Gift (IZhO18_nicegift)	C++20	0 / 100	120 ms	15620 KiB

nicegift

#include <bits/stdc++.h>

#define int long long

void solve() {
  int n, k;
  std::cin >> n >> k;
  std::vector<int> a(n + 1);
  for(int i = 1; i <= n; i++) {
    std::cin >> a[i];
  }
  if(*min_element(a.begin() + 1, a.end()) != *max_element(a.begin() + 1, a.end())) {
    return;
  }
  if(n % k == 0) {
    std::cout << n / k << "\n";
    int i = 1;
    while(i <= n) {
      for(int j = i; j <= i + k - 1; j++) {
        std::cout << j << " ";
      }
      std::cout << "\n";
      i += k;
    }
  }
  else {
    std::cout << - 1;
  }
}

signed main() {
  std::ios::sync_with_stdio(false);
  std::cin.tie(nullptr);

  int t = 1;
  //std::cin >> t;
  while (t--) {
      solve();
  }

  return 0;
}

• Subtask 1: 0 / 7
• Subtask 2: 0 / 11
• Subtask 3: 0 / 12
• Subtask 4: 0 / 19
• Subtask 5: 0 / 51