Submission #685380

#	Time	Username	Problem	Language	Result	Execution time	Memory
685380		dostigator	Gift (IZhO18_nicegift)	C++17	0 / 100	2075 ms	175824 KiB

nicegift

#include <bits/stdc++.h>

using namespace std;

#define all(a) a.begin(),a.end()
#define pb push_back
#define vt vector
#define endl '\n'
#define Y second
#define X first
typedef long long ll;
typedef long double ld;
const ll mod=1e9+7;
const ll INF=1e18;
const int inf=1e9;
const int N=2e6+505;
const int M=3e3+10;
const int dx[]={0,0,1,-1};
const int dy[]={1,-1,0,0};

/*From Benq:
    stuff you should look for
        * int overflow, array bounds
        * special cases (n=1?)
        * do smth instead of nothing and stay organized
        * WRITE STUFF DOWN
        * DON'T GET STUCK ON ONE APPROACH*/

int n,k;
ll a[N];

void solve(){
	cin>>n>>k;
	for(int i=1; i<=n; ++i){
		cin>>a[i];
	}sort(a+1,a+1+n);
	if(a[1]==a[n]){
		if(n%k){
			cout<<-1<<endl;
			return;
		}cout<<(n/k)*((a[1]+inf-1)/inf)<<endl;
		for(int i=1; i<=n; i+=k){
			while(a[i]>0){
				for(int j=i; j<i+k; ++j){
					cout<<j<<' ';
				}if(a[i]<inf){
					cout<<a[i]<<' ';
					a[i]=0;
					continue;
				}
				cout<<inf<<endl;
				a[i]-=inf;
			}
		}return;
	}
}

int main(){
	//srand(time(0));
	//freopen("hotel.in","r",stdin);
	//freopen("hotel.out","w",stdout);
	ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	int tt=1,lolol=0;
//	cin>>tt;
	while(tt--) {
		//cout<<"Case "<<++lolol<<": ";
		solve();
	}
}

Compilation message (stderr)

nicegift.cpp: In function 'int main()':
nicegift.cpp:63:11: warning: unused variable 'lolol' [-Wunused-variable]
   63 |  int tt=1,lolol=0;
      |           ^~~~~

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