oj.uz

Submission #721032

# Submission time Handle Problem Language Result Execution time Memory
721032 2023-04-10T08:25:25 Z cig32 Gift (IZhO18_nicegift) C++17
7 / 100
 2000 ms 152824 KB 
#pragma GCC optimize("Ofast")
#include "bits/stdc++.h"
#define int long long
using namespace std;
const int MAXN = 1e5 + 10;
void solve(int tc) {
  int n, k;
  cin >> n >> k;
  priority_queue<pair<int,int> > pq;
  multiset<int> ms;
  int a[n+1];
  for(int i=1; i<=n; i++) {
    cin >> a[i];
    pq.push({a[i], i});
    ms.insert(a[i]);
  }
  if(k == n) {
    for(int i=1; i<n; i++){
      if(a[i] != a[i+1]) {
        cout << "-1\n"; return;
      }
    }
    cout << "1\n";
    cout << a[1];
    for(int i=1; i<=n; i++) cout << " " << i;
    cout << '\n';
    return;
  }
  int lim = 3000000 / k;
  vector<vector<int> > ops;
  while(lim--) {
    while(pq.size() && pq.top().first == 0) pq.pop();
    if(pq.empty()) break;
    if(pq.size() < k) {
      cout << "-1\n"; return;
    }
    int mn = 1e18;
    stack<pair<int, int> > st;
    vector<int> lol;
    for(int i=0; i<k; i++) {
      st.push(pq.top());
      mn = min(mn, pq.top().first);
      lol.push_back(pq.top().second);
      pq.pop();
    }
    
    int cmp = 0;
    if(ms.size()) cmp = *ms.begin();
    mn = max(1ll, mn - cmp);
    while(st.size()) {
      if(st.top().first != mn) {
        pq.push({st.top().first - mn, st.top().second});
      }
      st.pop();
    }
    for(int x: lol) {
      ms.erase(ms.lower_bound(a[x]));
      a[x] -= mn;
      if(a[x] > 0) ms.insert(a[x]);
    }
    lol.push_back(mn);
    ops.push_back(lol);
  }
  for(int i=1; i<=n; i++) {
    if(a[i] != 0) {
      cout << "-1\n"; return;
    }
  }
  cout << ops.size() << "\n";
  for(vector<int> v: ops) {
    cout << v.back();
    for(int i=0; i<k; i++) cout << " " << v[i];
    cout << "\n";
  }
}
int32_t main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  int t=1;
  //cin>>t;
  for(int i=1; i<=t; i++)solve(i);
}
/*
5 2
1 2 4 8 15

3 2 
1 2 3

5 3
6 6 4 2 0

4 2
2 3 3 2

*/

Compilation message

nicegift.cpp: In function 'void solve(long long int)':
nicegift.cpp:34:18: warning: comparison of integer expressions of different signedness: 'std::priority_queue<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   34 |     if(pq.size() < k) {
      |        ~~~~~~~~~~^~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB n=4
2 Correct 1 ms 212 KB n=3
3 Correct 0 ms 212 KB n=3
4 Correct 0 ms 212 KB n=4
5 Correct 1 ms 212 KB n=4
6 Correct 0 ms 212 KB n=2

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB n=4
2 Correct 1 ms 212 KB n=3
3 Correct 0 ms 212 KB n=3
4 Correct 0 ms 212 KB n=4
5 Correct 1 ms 212 KB n=4
6 Correct 0 ms 212 KB n=2
7 Correct 0 ms 212 KB n=5
8 Correct 0 ms 212 KB n=8
9 Correct 1 ms 212 KB n=14
10 Incorrect 1 ms 212 KB Jury has the answer but participant has not
11 Halted 0 ms 0 KB -

Subtask #3
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB n=4
2 Correct 1 ms 212 KB n=3
3 Correct 0 ms 212 KB n=3
4 Correct 0 ms 212 KB n=4
5 Correct 1 ms 212 KB n=4
6 Correct 0 ms 212 KB n=2
7 Correct 0 ms 212 KB n=5
8 Correct 0 ms 212 KB n=8
9 Correct 1 ms 212 KB n=14
10 Incorrect 1 ms 212 KB Jury has the answer but participant has not
11 Halted 0 ms 0 KB -

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2067 ms 152824 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 51.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB n=4
2 Correct 1 ms 212 KB n=3
3 Correct 0 ms 212 KB n=3
4 Correct 0 ms 212 KB n=4
5 Correct 1 ms 212 KB n=4
6 Correct 0 ms 212 KB n=2
7 Correct 0 ms 212 KB n=5
8 Correct 0 ms 212 KB n=8
9 Correct 1 ms 212 KB n=14
10 Incorrect 1 ms 212 KB Jury has the answer but participant has not
11 Halted 0 ms 0 KB -