Submission #1154152

#	Time	Username	Problem	Language	Result	Execution time	Memory
1154152		asdasd	Gift (IZhO18_nicegift)	C++20	7 / 100	412 ms	78148 KiB

nicegift

//gm  --- akezhon
#include <bits/stdc++.h>
// #pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,O3")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#define pb push_back
#define pf push_front
#define F first
#define S second
#define all(v) v.begin(),v.end()
#define pii pair<int,int>
#define tm (tl+tr)/2
#define TL v+v, tl, tm
#define TR v+v+1, tm+1, tr
#define DA l <= tl && tr <= r
#define NE r < tl || tr < l
#define double long double
// #define int long long
using namespace std;

const int N=2e5+7;
const int mod=1e9+7;
const int inf=2e9;

void AlemAmenov(){
    int n, k;
    cin >> n >> k;
    int a[n+1];
    multiset<pii>st;
    vector<vector<int>>ans;
    vector<int>d;
    for(int i=1; i <= n; i++){
        cin >> a[i];
        st.insert({a[i], i});
    }
    bool ok=1;
    while(st.size()){
        vector<pii>v;
        pii x;
        for(int i=1; i <= k; i++){
            if(st.empty()){
                ok=0;
                break;
            }
            x=*st.rbegin();
            v.pb(x);
            st.erase(--st.end());
        }
        if(!ok)break;
        vector<int>temp;
        for(auto [f, i] : v){
            if(f-x.F)st.insert({f-x.F, i});
            temp.pb(i);
        }
        ans.pb(temp);
        d.pb(x.F);
    }
    if(!ok || ans.size()*k > 3000000)cout << -1;
    else {
        cout << ans.size() << '\n';
        for(int i=0; i < ans.size(); i++){
            cout << d[i] << ' ';
            for(int it : ans[i]){
                cout << it << ' ';
            }
            cout << '\n';
        }
    }
}
signed main(){

    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int RealName=1;
    // cin >> RealNam;
    // srand(time(0));

    while(RealName--)
        AlemAmenov();
    
return 0;
}

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