Submission #1112670

#	Time	Username	Problem	Language	Result	Execution time	Memory
1112670		noyancanturk	Gift (IZhO18_nicegift)	C++17	7 / 100	633 ms	70648 KiB

nicegift

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define pb push_back
using pii=pair<int,int>;
const int lim=1e5+100;

struct op{
  int val;
  vector<int>inds;
};

signed main(){
  int n,k;
  cin>>n>>k;
  int a[n];
  priority_queue<pii>pq;
  for(int i=0;i<n;i++)cin>>a[i],pq.push({a[i],i});
  vector<op>ops;
  while(pq.size()){
    op curop;
    while(curop.inds.size()<k){
      if(!pq.size()){
        cout<<-1;
        return 0;
      }
      curop.inds.pb(pq.top().second);
      pq.pop();
    }
    curop.val=a[curop.inds.back()];
    for(int i:curop.inds){
      a[i]-=curop.val;
      if(a[i]){
        pq.push({a[i],i});
      }
    }
    ops.pb(curop);
  }
  cout<<ops.size()<<'\n';
  for(op&p:ops){
    cout<<p.val<<' ';
    for(int i:p.inds){
      cout<<i+1<<' ';
    }
    cout<<'\n';
  }
}

Compilation message (stderr)

nicegift.cpp: In function 'int main()':
nicegift.cpp:22:28: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   22 |     while(curop.inds.size()<k){
      |           ~~~~~~~~~~~~~~~~~^~

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