Submission #342886

#	Time	Username	Problem	Language	Result	Execution time	Memory
342886		maskoff	Money (IZhO17_money)	C++17	9 / 100	1 ms	384 KiB

money

#include <bits/stdc++.h>
 
#define file ""
 
#define all(x) x.begin(), x.end()
 
#define sc second
#define fr first
 
#define pb push_back
#define mp make_pair
 
using namespace std;
 
typedef long long ll;
typedef pair<int, int> pii;
 
const ll inf = 1e18 + 5;
const ll mod = 1e9 + 7;
 
const int N = 1e5 + 5;
 
int dx[] = {+1, 0, -1, 0};
int dy[] = {0, +1, 0, -1};
 
int n;
int a[N];
void solve1() {
	int res = 40;
 	for (int mask = 1; mask < (1 << n); mask += 2) {
 		//cerr << mask << endl;
 		vector<int> v[20];
 		int cur = 0;
 		for (int i = 0; i < n; i++) {
 		 	if (mask & (1 << i)) v[++cur].pb(a[i + 1]);
 		 	else v[cur].pb(a[i + 1]);
 		}
 		vector<int> ans;
 		for (int to : v[1]) ans.pb(to);
 		if (!is_sorted(all(ans))) continue;
 			
 		for (int i = 2; i <= cur; i++) {
 			//cerr << "i : " << i << endl;
 		 	for (int p = 0; p <= ans.size(); p++) {
 		 		vector<int> d = ans;
 		 		//cerr << "p : " << p << endl;
      	for (int j = 0; j < v[i].size(); j++)
      		d.insert(d.begin() + p + j, v[i][j]);
      	//for (int to : d) cerr << to << " ";
      	//cerr << endl;
      	if (is_sorted(all(d))) {
      	 	ans = d;
      	 	goto pos;
      	}
      }
      goto here;
     	pos:;
 		}
 		res = min(res, cur);
 		here:;
 	}
 	cout << res;
}

int main() {  
	ios_base :: sync_with_stdio(false);               
	cin.tie(nullptr);
	srand(time(nullptr));
	cin >> n;
	for (int i = 1; i <= n; i++) cin >> a[i];
	if (n <= 8) solve1();

  return 0;
}  

Compilation message (stderr)

money.cpp: In function 'void solve1()':
money.cpp:44:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |      for (int p = 0; p <= ans.size(); p++) {
      |                      ~~^~~~~~~~~~~~~
money.cpp:47:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |        for (int j = 0; j < v[i].size(); j++)
      |                        ~~^~~~~~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 0 / 16
• Subtask 3: 0 / 20
• Subtask 4: 0 / 55