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Submission #511145

# Submission time Handle Problem Language Result Execution time Memory
511145 2022-01-15T09:16:50 Z Mazaalai Gift (IZhO18_nicegift) C++17
49 / 100
 2000 ms 125892 KB 
#include <bits/stdc++.h>
#define pb push_back
#define ff first
#define ss second
#define LLA(x) x.rbegin(),x.rend()
#define print(x) for(auto el:x)cout<<el<<' ';cout<<"\n";
#define printPII(x) for(auto [a,b]:x)cout<<a<<","<<b<<' ';cout<<'\n';
using namespace std;
using ll = long long;
using PII = pair <ll, ll>;
ll n, k, onePick = 1;
bool impossible;
signed main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	// freopen("in.txt", "r", stdin);
	// freopen("out.txt", "w", stdout);
	cin >> n >> k;
	vector <vector <ll> > ans;
	set <PII> bfs;
	ll sum = 0, val, id, dbg = 0;
	for (int i = 1; i <= n; i++) {
		ll x; cin >> x;
		sum += x;
		bfs.insert({x, i});
	}
	bfs.insert({0, 0});
	ll packs = sum / k;
	if (sum % k != 0 || bfs.rbegin()->ff > packs) {
		cout << "-1\n";
		return 0;
	}
	while(packs > 0) {
		vector <PII> add;
		for (int i = 0; i < k; i++) {
			auto it = --bfs.end();
			tie(val, id) = *it;
			bfs.erase(it);
			add.pb({val, id});
		}
		ll pick = min(add.back().ff, packs-((--bfs.end())->ff));
		packs -= pick;
		vector <ll> cur(1, pick);
		for (int i = 0; i < k; i++) {
			tie(val, id) = add.back();
			add.pop_back();
			val -= pick;
			cur.pb(id);
			bfs.insert({val, id});
		}
		ans.pb(cur);
	}
	cout << ans.size() << '\n';
	for (auto el : ans) {print(el);}
}

Compilation message

nicegift.cpp: In function 'int main()':
nicegift.cpp:22:23: warning: unused variable 'dbg' [-Wunused-variable]
   22 |  ll sum = 0, val, id, dbg = 0;
      |                       ^~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB n=4
2 Correct 0 ms 204 KB n=3
3 Correct 0 ms 204 KB n=3
4 Correct 0 ms 204 KB n=4
5 Correct 0 ms 204 KB n=4
6 Correct 0 ms 316 KB n=2

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB n=4
2 Correct 0 ms 204 KB n=3
3 Correct 0 ms 204 KB n=3
4 Correct 0 ms 204 KB n=4
5 Correct 0 ms 204 KB n=4
6 Correct 0 ms 316 KB n=2
7 Correct 0 ms 312 KB n=5
8 Correct 1 ms 204 KB n=8
9 Correct 0 ms 204 KB n=14
10 Correct 1 ms 204 KB n=11
11 Correct 35 ms 5604 KB n=50000
12 Correct 33 ms 5244 KB n=50000
13 Correct 0 ms 204 KB n=10
14 Correct 1 ms 332 KB n=685
15 Correct 1 ms 332 KB n=623
16 Correct 1 ms 332 KB n=973

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB n=4
2 Correct 0 ms 204 KB n=3
3 Correct 0 ms 204 KB n=3
4 Correct 0 ms 204 KB n=4
5 Correct 0 ms 204 KB n=4
6 Correct 0 ms 316 KB n=2
7 Correct 0 ms 312 KB n=5
8 Correct 1 ms 204 KB n=8
9 Correct 0 ms 204 KB n=14
10 Correct 1 ms 204 KB n=11
11 Correct 35 ms 5604 KB n=50000
12 Correct 33 ms 5244 KB n=50000
13 Correct 0 ms 204 KB n=10
14 Correct 1 ms 332 KB n=685
15 Correct 1 ms 332 KB n=623
16 Correct 1 ms 332 KB n=973
17 Correct 1 ms 332 KB n=989
18 Correct 1 ms 332 KB n=563
19 Correct 1 ms 332 KB n=592
20 Correct 1 ms 332 KB n=938
21 Correct 1 ms 312 KB n=747
22 Correct 1 ms 332 KB n=991

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 947 ms 104724 KB n=1000000
2 Correct 557 ms 70544 KB n=666666
3 Correct 312 ms 40976 KB n=400000
4 Correct 200 ms 28788 KB n=285714
5 Correct 13 ms 2100 KB n=20000
6 Correct 120 ms 17784 KB n=181818
7 Correct 6 ms 1136 KB n=10000
8 Correct 5 ms 972 KB n=6666
9 Correct 3 ms 568 KB n=4000
10 Correct 6 ms 716 KB n=2857
11 Correct 2 ms 456 KB n=2000

Subtask #5
0 / 51.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB n=4
2 Correct 0 ms 204 KB n=3
3 Correct 0 ms 204 KB n=3
4 Correct 0 ms 204 KB n=4
5 Correct 0 ms 204 KB n=4
6 Correct 0 ms 316 KB n=2
7 Correct 0 ms 312 KB n=5
8 Correct 1 ms 204 KB n=8
9 Correct 0 ms 204 KB n=14
10 Correct 1 ms 204 KB n=11
11 Correct 35 ms 5604 KB n=50000
12 Correct 33 ms 5244 KB n=50000
13 Correct 0 ms 204 KB n=10
14 Correct 1 ms 332 KB n=685
15 Correct 1 ms 332 KB n=623
16 Correct 1 ms 332 KB n=973
17 Correct 1 ms 332 KB n=989
18 Correct 1 ms 332 KB n=563
19 Correct 1 ms 332 KB n=592
20 Correct 1 ms 332 KB n=938
21 Correct 1 ms 312 KB n=747
22 Correct 1 ms 332 KB n=991
23 Correct 947 ms 104724 KB n=1000000
24 Correct 557 ms 70544 KB n=666666
25 Correct 312 ms 40976 KB n=400000
26 Correct 200 ms 28788 KB n=285714
27 Correct 13 ms 2100 KB n=20000
28 Correct 120 ms 17784 KB n=181818
29 Correct 6 ms 1136 KB n=10000
30 Correct 5 ms 972 KB n=6666
31 Correct 3 ms 568 KB n=4000
32 Correct 6 ms 716 KB n=2857
33 Correct 2 ms 456 KB n=2000
34 Correct 22 ms 3220 KB n=23514
35 Correct 22 ms 3208 KB n=23514
36 Correct 1 ms 308 KB n=940
37 Correct 0 ms 312 KB n=2
38 Correct 75 ms 9452 KB n=100000
39 Correct 69 ms 9336 KB n=100000
40 Correct 1 ms 204 KB n=10
41 Correct 1 ms 388 KB n=100
42 Correct 5 ms 460 KB n=1000
43 Correct 1073 ms 125892 KB n=1000000
44 Execution timed out 2077 ms 103084 KB Time limit exceeded
45 Halted 0 ms 0 KB -