//#pragma GCC optomize ("Ofast")
//#pragma GCC optomize ("unroll-loops")
//#pragma GCC target ("avx,avx2,fma")
#include <bits/stdc++.h>
#define F first
#define S second
#define pb push_back
#define sz size
#define cl clear
#define ins insert
#define ers erase
#define pii pair < int , int >
#define pll pair< long long , long long >
#define all(x) x.begin() , x.end()
#define ios ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define file(s) if (fopen(s".in", "r")) freopen(s".in", "r", stdin), freopen(s".out", "w", stdout)
#define tostr(x) to_string(x)
#define tonum(s) atoi(s.c_str())
#define seon(x) setprecision(x)
#define bpop(x) __builtin_popcount(x)
#define deb(x) cerr << #x << " = " << x << endl;
typedef long long ll;
typedef unsigned long long ull;
typedef double db;
typedef long double ldb;
const double PI = 3.14159265;
const ll N = 1e6+5;
const ll mod = 1e9+7;
const ll inf = 1e9;
const ll INF = 1e18;
using namespace std;
set<pll>st;
pll b[N];
vector<int> v[N];
void solve(){
ll n , k ,cnt = 0;
cin >> n >> k;
for(int i = 1; i <= n; i++){
ll a;
cin >> a;
st.ins({a , i});
}
while(st.sz()){
++cnt;
if(st.sz() < k){
cout << "-1\n";
return;
}
for(int i = 1; i <= k; i++){
b[i] = *st.rbegin();
st.ers(*st.rbegin());
v[cnt].pb(b[i].S);
}
for(int i = 1; i <= k; i++) {
b[i].F--;
if(b[i].F) st.ins({b[i].F , b[i].S});
}
}
cout << cnt <<"\n";
for(int i = 1; i <= cnt; i++){
cout << 1 <<" ";
for(int x : v[i]) cout << x <<" ";
cout << "\n";
}
}
signed main(){
ios;
solve();
return 0;
}
/*
*/
Compilation message
nicegift.cpp: In function 'void solve()':
nicegift.cpp:50:14: warning: comparison of integer expressions of different signedness: 'std::set<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
50 | if(st.sz() < k){
| ~~~~~~~~^~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
12 ms |
23764 KB |
n=4 |
| 2 |
Correct |
12 ms |
23764 KB |
n=3 |
| 3 |
Correct |
12 ms |
23764 KB |
n=3 |
| 4 |
Correct |
12 ms |
23760 KB |
n=4 |
| 5 |
Correct |
12 ms |
23744 KB |
n=4 |
| 6 |
Correct |
13 ms |
23764 KB |
n=2 |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
12 ms |
23764 KB |
n=4 |
| 2 |
Correct |
12 ms |
23764 KB |
n=3 |
| 3 |
Correct |
12 ms |
23764 KB |
n=3 |
| 4 |
Correct |
12 ms |
23760 KB |
n=4 |
| 5 |
Correct |
12 ms |
23744 KB |
n=4 |
| 6 |
Correct |
13 ms |
23764 KB |
n=2 |
| 7 |
Correct |
12 ms |
23764 KB |
n=5 |
| 8 |
Correct |
15 ms |
24020 KB |
n=8 |
| 9 |
Correct |
19 ms |
24256 KB |
n=14 |
| 10 |
Correct |
16 ms |
24144 KB |
n=11 |
| 11 |
Correct |
53 ms |
28272 KB |
n=50000 |
| 12 |
Correct |
66 ms |
28400 KB |
n=50000 |
| 13 |
Correct |
35 ms |
25728 KB |
n=10 |
| 14 |
Correct |
36 ms |
25540 KB |
n=685 |
| 15 |
Correct |
40 ms |
25676 KB |
n=623 |
| 16 |
Correct |
29 ms |
24844 KB |
n=973 |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
12 ms |
23764 KB |
n=4 |
| 2 |
Correct |
12 ms |
23764 KB |
n=3 |
| 3 |
Correct |
12 ms |
23764 KB |
n=3 |
| 4 |
Correct |
12 ms |
23760 KB |
n=4 |
| 5 |
Correct |
12 ms |
23744 KB |
n=4 |
| 6 |
Correct |
13 ms |
23764 KB |
n=2 |
| 7 |
Correct |
12 ms |
23764 KB |
n=5 |
| 8 |
Correct |
15 ms |
24020 KB |
n=8 |
| 9 |
Correct |
19 ms |
24256 KB |
n=14 |
| 10 |
Correct |
16 ms |
24144 KB |
n=11 |
| 11 |
Correct |
53 ms |
28272 KB |
n=50000 |
| 12 |
Correct |
66 ms |
28400 KB |
n=50000 |
| 13 |
Correct |
35 ms |
25728 KB |
n=10 |
| 14 |
Correct |
36 ms |
25540 KB |
n=685 |
| 15 |
Correct |
40 ms |
25676 KB |
n=623 |
| 16 |
Correct |
29 ms |
24844 KB |
n=973 |
| 17 |
Correct |
40 ms |
25216 KB |
n=989 |
| 18 |
Correct |
26 ms |
24356 KB |
n=563 |
| 19 |
Correct |
38 ms |
24780 KB |
n=592 |
| 20 |
Correct |
36 ms |
24696 KB |
n=938 |
| 21 |
Correct |
29 ms |
24616 KB |
n=747 |
| 22 |
Correct |
32 ms |
24588 KB |
n=991 |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
1230 ms |
238468 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
12 ms |
23764 KB |
n=4 |
| 2 |
Correct |
12 ms |
23764 KB |
n=3 |
| 3 |
Correct |
12 ms |
23764 KB |
n=3 |
| 4 |
Correct |
12 ms |
23760 KB |
n=4 |
| 5 |
Correct |
12 ms |
23744 KB |
n=4 |
| 6 |
Correct |
13 ms |
23764 KB |
n=2 |
| 7 |
Correct |
12 ms |
23764 KB |
n=5 |
| 8 |
Correct |
15 ms |
24020 KB |
n=8 |
| 9 |
Correct |
19 ms |
24256 KB |
n=14 |
| 10 |
Correct |
16 ms |
24144 KB |
n=11 |
| 11 |
Correct |
53 ms |
28272 KB |
n=50000 |
| 12 |
Correct |
66 ms |
28400 KB |
n=50000 |
| 13 |
Correct |
35 ms |
25728 KB |
n=10 |
| 14 |
Correct |
36 ms |
25540 KB |
n=685 |
| 15 |
Correct |
40 ms |
25676 KB |
n=623 |
| 16 |
Correct |
29 ms |
24844 KB |
n=973 |
| 17 |
Correct |
40 ms |
25216 KB |
n=989 |
| 18 |
Correct |
26 ms |
24356 KB |
n=563 |
| 19 |
Correct |
38 ms |
24780 KB |
n=592 |
| 20 |
Correct |
36 ms |
24696 KB |
n=938 |
| 21 |
Correct |
29 ms |
24616 KB |
n=747 |
| 22 |
Correct |
32 ms |
24588 KB |
n=991 |
| 23 |
Runtime error |
1230 ms |
238468 KB |
Execution killed with signal 11 |
| 24 |
Halted |
0 ms |
0 KB |
- |
