제출 #448803

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
448803		dxz05	Gift (IZhO18_nicegift)	C++14	30 / 100	273 ms	47336 KiB

nicegift

#pragma GCC optimize("Ofast,O2,O3")
#pragma GCC target("avx2")

#include <bits/stdc++.h>

using namespace std;

void debug_out() { cerr << endl; }

template<typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
    cerr << "[" << H << "]";
    debug_out(T...);
}

#ifdef dddxxz
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#else
#define debug(...) 42
#endif

#define SZ(s) ((int)s.size())
#define all(x) (x).begin(), (x).end()
#define revall(x) (x).rbegin(), (x).rend()

clock_t startTime;

double getCurrentTime() {
    return (double) (clock() - startTime) / CLOCKS_PER_SEC;
}

#define MP make_pair

typedef long long ll;
mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
const double eps = 0.00001;
const int MOD = 1e9;
const int INF = 1000000101;
const long long LLINF = 1223372000000000555;
const int N = 2e6 + 3e2;
const int M = 5222;

int a[N];

void solve(int TC) {
    int n, k;
    cin >> n >> k;

    set<pair<int, int>> s;
    for (int i = 1; i <= n; i++){
        cin >> a[i];
        s.insert(MP(a[i], i));
    }

    vector<vector<int>> ans;
    while (s.rbegin()->first > 0){
        int kk = k;
        vector<int> v;
        while (kk--){
            v.push_back(s.rbegin()->second);
            s.erase(*s.rbegin());
        }

        for (int i : v){
            a[i]--;
            if (a[i] < 0){
                cout << -1;
                return;
            }
            s.insert(MP(a[i], i));
        }

        ans.push_back(v);

    }

    cout << ans.size() << endl;

    for (auto v : ans){
        cout << 1 << ' ';
        for (int i : v) cout << i << ' ';
        cout << endl;
    }

}

int main() {
    startTime = clock();
    cin.tie(nullptr);
    cout.tie(nullptr);
    ios_base::sync_with_stdio(false);

    bool llololcal = false;
#ifdef dddxxz
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    llololcal = true;
#endif

    int TC = 1;
    //cin >> TC;

    for (int test = 1; test <= TC; test++) {
        debug(test);
        //cout << "Case #" << test << ": ";
        solve(test);
    }

    if (llololcal) cerr << endl << "Time: " << int(getCurrentTime() * 1000) << " ms" << endl;

    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

nicegift.cpp: In function 'int main()':
nicegift.cpp:19:20: warning: statement has no effect [-Wunused-value]
   19 | #define debug(...) 42
      |                    ^~
nicegift.cpp:104:9: note: in expansion of macro 'debug'
  104 |         debug(test);
      |         ^~~~~

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