Submission #1102399

#	Time	Username	Problem	Language	Result	Execution time	Memory
1102399		vjudge1	Weird Numeral System (CCO21_day1problem2)	C++17	25 / 25	1059 ms	25200 KiB

Main

#include <iostream>
#include <queue>
#include <map>
using namespace std;
#define int long long
map<int, int> m;
vector<int> g[1000005], res;
int k;
bool trya(int x) {
    if (m.count(x)) return false;
    int h = (x % k + k) % k;
    m[x] = 0;
    for (int i = 0; i < g[h].size(); i++) {
      	int w = g[h][i];
        if (x == w) {
            res.push_back(w);
            return true;
        }
        if ((x - w) / k != x && trya((x - w) / k)) {
            res.push_back(w);
            return true;
        }
    }
    return false;
}
signed main() {
    ios::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    int q, d, ma;
    cin >> k >> q >> d >> ma;
    for (int i = 1; i <= d; i++) {
        int x, y;
        cin >> x;
        y = (x % k + k) % k;
        g[y].push_back(x);
    }
    for (int jj = 0; jj < q; jj++) {
        int x, y;
        cin >> x;
        m.clear();
        res.clear();
        y = trya(x);
        if (y == 0) {
            cout << "IMPOSSIBLE" << '\n';
            continue;
        }
        for (int i = 0; i < res.size(); i++) cout << res[i] << " \n"[i+1==(int)res.size()];
    }
}

Compilation message (stderr)

Main.cpp: In function 'bool trya(long long int)':
Main.cpp:13:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |     for (int i = 0; i < g[h].size(); i++) {
      |                     ~~^~~~~~~~~~~~~
Main.cpp: In function 'int main()':
Main.cpp:47:27: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |         for (int i = 0; i < res.size(); i++) cout << res[i] << " \n"[i+1==(int)res.size()];
      |                         ~~^~~~~~~~~~~~

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