Submission #496931

#	Time	Username	Problem	Language	Result	Execution time	Memory
496931		abc864197532	DEL13 (info1cup18_del13)	C++17	12 / 100	1085 ms	332 KiB

del13

#include <bits/stdc++.h>
using namespace std;
#define lli long long int
#define mp make_pair
#define eb emplace_back
#define pb push_back
#define X first
#define Y second
#define pii pair<int,int>
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
void abc() {cout << endl;}
template <typename T, typename ...U> void abc(T i, U ...j) {
	cout << i << ' ', abc(j...);
}
template <typename T> void printv(T l, T r) {
	for (; l != r; ++l) 
		cout << *l << " \n"[l + 1 == r];
}
#ifdef Doludu
#define test(x...) abc("[" + string(#x) + "]", x);
#else
#define test(x...) void(0);
#endif
const int N = 1001;

bool ask (vector <int> now, vector <int> goal) {
	if (now == goal)
		return true;
	for (int i : goal) if (!count(all(now), i))
		return false;
	for (int i = 1; i + 1 < now.size(); ++i) {
		vector <int> a = now;
		a.erase(a.begin() + i - 1);
		a.erase(a.begin() + i);
		if (ask(a, goal))
			return true;
	}
	return false;
}

int main () {
	ios::sync_with_stdio(false);
	cin.tie(0);
	int t;
	cin >> t;
	while (t--) {
		int n, m;
		cin >> n >> m;
		vector <int> a(m), b(n);
		for (int i = 0; i < m; ++i) {
			cin >> a[i], --a[i];
		}
		iota(all(b), 0);
		if (ask(b, a)) {
			cout << 0 << endl << endl;
		} else {
			cout << -1 << endl;
		}
	}
}

Compilation message (stderr)

del13.cpp: In function 'bool ask(std::vector<int>, std::vector<int>)':
del13.cpp:32:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |  for (int i = 1; i + 1 < now.size(); ++i) {
      |                  ~~~~~~^~~~~~~~~~~~

• Subtask 1: 6 / 15
• Subtask 2: 6 / 15
• Subtask 3: 0 / 15
• Subtask 4: 0 / 25
• Subtask 5: 0 / 30