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Submission #378687

# Submission time Handle Problem Language Result Execution time Memory
378687 2021-03-17T03:12:44 Z syl123456 Gift (IZhO18_nicegift) C++17
7 / 100
 256 ms 48492 KB 
#include <bits/stdc++.h>
#define all(i) i.begin(), i.end()
#define rall(i) i.rbegin(), i.rend()
using namespace std;
typedef long long ll;
typedef pair<int, int> pi;
typedef pair<ll, int> pl;
ll gcd(ll i, ll j) {
    if (j == 0) return i;
    return i % j ? gcd(j, i % j) : j;
}
ll lcm(ll i, ll j) {
    return i * j / gcd(i, j);
}
int main() {
    ios::sync_with_stdio(0), cin.tie(0);
    int n, k;
    cin >> n >> k;
    ll a[n], sum = 0, mx = 0;
    priority_queue<pl> pq;
    for (int i = 0; i < n; ++i) cin >> a[i], sum += a[i], mx = max(mx, a[i]), pq.emplace(a[i], i);
    if (sum % k != 0 || mx > sum / k) return cout << -1, 0;
    vector<int> v;
    vector<vector<int>> ans;
    while (sum > 0) {
        for (int i = 0; i < k; ++i)
            v.push_back(pq.top().second), pq.pop();
        if (a[v.back()] == sum / k) {
            ans.emplace_back(1, sum / k);
            for (int i : v) ans.back().push_back(i + 1);
            break;
        }
        ll x = min((sum - pq.top().first) / k, (sum - a[v.back()]) / (k + 1));
        assert(x > 0);
        //sum - a[k] >= kx
        //sum - a[k-1]-x >= kx
        ans.emplace_back(1, x);
        while (!v.empty()) {
            int i = v.back();
            v.pop_back();
            ans.back().push_back(i + 1);
            a[i] -= x, sum -= x;
            pq.emplace(a[i], i);
        }
    }
    cout << ans.size() << '\n';
    for (auto i : ans) {
        for (int j : i) cout << j << ' ';
        cout << '\n';
    }
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB n=4
2 Correct 1 ms 364 KB n=3
3 Correct 1 ms 364 KB n=3
4 Correct 1 ms 364 KB n=4
5 Correct 1 ms 364 KB n=4
6 Correct 1 ms 364 KB n=2

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB n=4
2 Correct 1 ms 364 KB n=3
3 Correct 1 ms 364 KB n=3
4 Correct 1 ms 364 KB n=4
5 Correct 1 ms 364 KB n=4
6 Correct 1 ms 364 KB n=2
7 Correct 1 ms 364 KB n=5
8 Correct 1 ms 364 KB n=8
9 Runtime error 1 ms 492 KB Execution killed with signal 6
10 Halted 0 ms 0 KB -

Subtask #3
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB n=4
2 Correct 1 ms 364 KB n=3
3 Correct 1 ms 364 KB n=3
4 Correct 1 ms 364 KB n=4
5 Correct 1 ms 364 KB n=4
6 Correct 1 ms 364 KB n=2
7 Correct 1 ms 364 KB n=5
8 Correct 1 ms 364 KB n=8
9 Runtime error 1 ms 492 KB Execution killed with signal 6
10 Halted 0 ms 0 KB -

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Runtime error 256 ms 48492 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #5
0 / 51.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB n=4
2 Correct 1 ms 364 KB n=3
3 Correct 1 ms 364 KB n=3
4 Correct 1 ms 364 KB n=4
5 Correct 1 ms 364 KB n=4
6 Correct 1 ms 364 KB n=2
7 Correct 1 ms 364 KB n=5
8 Correct 1 ms 364 KB n=8
9 Runtime error 1 ms 492 KB Execution killed with signal 6
10 Halted 0 ms 0 KB -