Submission #1103686

#	Time	Username	Problem	Language	Result	Execution time	Memory
1103686		BuzzyBeez	Weird Numeral System (CCO21_day1problem2)	C++17	0 / 25	1 ms	336 KiB

Main

#include <bits/stdc++.h>
using namespace std;
#define int long long

const long long inf = LLONG_MAX;

map<long long, long long> memo;
vector<int> arr;

int d; long long K;
// bool attempt(long long R) {
	// if (par.count(R)) return (par[R] != inf);
	// par[R] = inf;
	// for (int x : arr) if (abs(R - x) % K == 0) 
		// if (R == x || attempt((R - x) / K)) {par[R] = x; return 1;}
	// return 0;
// }

bool attempt(long long a){
    if(memo.count(a))return memo[a]!=LLONG_MAX;
    memo[a]=LLONG_MAX;
    for(auto x:arr){
        if((a-x)%K==0){
            if(a-x==0||attempt((a-x)/K)){
                memo[a]=x;
                return true;
            }
        }
    }
    return false;
}

signed main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
	int q, m; cin >> K >> q >> d >> m;
	arr.resize(d);
	for (int i = 0; i < d; ++i) cin >> arr[i];
	long long N; bool pass;
	while (q--) {
		cin >> N; pass = attempt(N);
		if (!pass) cout << "IMPOSSIBLE\n";
		else {
			vector<int> ans; long long x;
			while (1) {
				x = memo[N]; ans.push_back(x);
				N = (N - x) / K;
				if (N == 0) break;
			}
			reverse(ans.begin(), ans.end());
			for (int i : ans) cout << i << ' ';
			cout << '\n';
		}
	}
}

• Subtask 1: 0 / 8
• Subtask 2: 0 / 17