Submission #501588

#	Time	Username	Problem	Language	Result	Execution time	Memory
501588		mansur	Money (IZhO17_money)	C++17	25 / 100	360 ms	324 KiB

money

#include<bits/stdc++.h>	
 
#pragma optimize ("g",on)
#pragma GCC optimize ("inline")
#pragma GCC optimize ("Ofast")
#pragma GCC optimize ("unroll-loops")
#pragma GCC optimize ("03")
#pragma GCC target ("sse,sse2,sse3,ssse3,sse4,popcnt,abm,avx2,mmx,fma,avx,tune=native")
#pragma comment(linker, "/stack:200000000")

//01001101 01100001 01101011 01101000 01100001  01100111 01100001 01111001 

using namespace std;

#define all(a) a.begin(), a.end()                                                   
#define rall(a) a.rbegin(), a.rend()
#define ll long long
#define pb push_back
#define sz(a) a.size()
#define nl '\n'
#define popb pop_back()                                                                   
#define ld double
#define ull unsigned long long
#define ff first                                         
#define ss second  
#define fix fixed << setprecision
#define pii pair<int, int>                          
#define E exit (0)
#define int long long
 
const int inf = 1e18, N = 5e5 + 1, mod = 998244353;                    

vector<pii> dir = {{1, 0}, {0, 1}, {-1, 0}, {0, -1}};

main() {                                                         
	//freopen("cowrect.in", "r", stdin);                                                                                     
	//freopen("cowrect.out", "w", stdout);                                                                                     
	ios_base::sync_with_stdio(NULL);                                                                                        
	cin.tie(NULL);  
	int n, ans = inf;
	cin >> n;
	int a[n];
	for (int i = 0; i < n; i++) cin >> a[i];
	for (int mask = 0; mask < (1 << (n - 1)); mask++) {
		vector<pii> s;
		vector<int> h;
		int l = 0, cnt = 0, is = 1;
		for (int i = 1; i < n; i++) {
			if (mask >> (i - 1) & 1) {
				s.pb({l, i - 1});
				l = i;
				cnt++;
				continue;
			}
			if (a[i] < a[i - 1]) is = 0;
		}      
		s.pb({l, n - 1});
		cnt++;
		for (auto e: s) {
			if (h.empty()) {
				for (int i = e.ff; i <= e.ss; i++) h.pb(a[i]);
				continue;
            }
            if (h[0] >= a[e.ss]) {
            	for (int i = e.ss; i >= e.ff; i--) h.insert(h.begin(), a[i]);
            	continue;
            }
            if (h.back() <= a[e.ff]) {
            	for (int i = e.ff; i <= e.ss; i++) h.pb(a[i]);
            	continue;
            }
            bool ok = 0;
			for (int i = 0; i < sz(h) - 1; i++) {
				if (h[i] <= a[e.ff] && a[e.ss] <= h[i + 1]) {
            		for (int j = e.ss; j >= e.ff; j--) h.insert(h.begin() + i + 1, a[j]);
            		ok = 1;
            		break;
				}
			}
			if (!ok) is = 0;
		}
		if (is) ans = min(ans, cnt);
	}
	cout << ans;
}

Compilation message (stderr)

money.cpp:3: warning: ignoring '#pragma optimize ' [-Wunknown-pragmas]
    3 | #pragma optimize ("g",on)
      | 
money.cpp:9: warning: ignoring '#pragma comment ' [-Wunknown-pragmas]
    9 | #pragma comment(linker, "/stack:200000000")
      | 
money.cpp:35:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   35 | main() {
      | ^~~~
money.cpp: In function 'int main()':
money.cpp:73:22: 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]
   73 |    for (int i = 0; i < sz(h) - 1; i++) {
      |                    ~~^~~~~~~~~~~

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