Submission #333606

#	Time	Username	Problem	Language	Result	Execution time	Memory
333606		tengiz05	Money (IZhO17_money)	C++17	100 / 100	1281 ms	62188 KiB

money

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define FASTIO ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
#define all(x) (x).begin(), (x).end()
#define pb push_back
#define pii pair<int, int>
#define ff first
#define ss second
#define PI acos(-1)
#define ld long double
const int mod = 1e9+7, N = 1e6+5;
int msb(int val){return sizeof(int)*8-__builtin_clzll(val);}
int a[N], n, m, k;
int f(int n){
	int i, j;
	set<int> s;
	s.insert(mod);
	int ans = 0;
	for(i=1;i<=n;i++){
		ans++;
		j = i;
		int need = *s.upper_bound(a[i]);
		
		s.insert(a[i]);
		while(i+1 <= n && a[i+1] >= a[i] && a[i+1] <= need){
			i++;
			s.insert(a[i]);
		}
	}
	return ans;
}

int f1(int n){
	int i, j;
	int ans = mod;
	vector<int> v;
	for(i=1;i<=n;i++)v.pb(a[i]);
	for(int mask = 0; mask < (1<<n); mask++){
		set<int> s;
		s.insert(mod);
		int tt = 0;
		for(i=0;i<n;i++){
			tt++;
			int need = *s.upper_bound(v[i]);
			s.insert(v[i]);
			int cnt =1;
			while(i+1 < n && (((mask&(1<<i)) && (mask&(1<<(i+1)))) || (!(mask&(1<<i)) && (!(mask&(1<<(i+1))))))){
				if(v[i+1] < v[i])tt = mod;
				i++;
				if(v[i] > need)tt = mod;
				s.insert(v[i]);cnt++;
			}
		}ans = min(ans, tt);
	//	cout << mask << ' ' << tt << '\n';
	}
	assert(ans != mod);
	return ans;
}

/*

7
1 5 7 2 3 4 6


* */
void solve(int test_case){
	int i, j;
	cin >> n;
	for(i=1;i<=n;i++){
		cin >> a[i];
	}
	cout << f(n) << '\n';
}

signed main(){
	FASTIO;
#define MULTITEST 0
#if MULTITEST
	int ___T;
	cin >> ___T;
	for(int T_CASE = 1; T_CASE <= ___T; T_CASE++)
		solve(T_CASE);
#else
	solve(1);
#endif
	return 0;
}

Compilation message (stderr)

money.cpp: In function 'long long int f(long long int)':
money.cpp:16:9: warning: variable 'j' set but not used [-Wunused-but-set-variable]
   16 |  int i, j;
      |         ^
money.cpp: In function 'long long int f1(long long int)':
money.cpp:35:9: warning: unused variable 'j' [-Wunused-variable]
   35 |  int i, j;
      |         ^
money.cpp: In function 'void solve(long long int)':
money.cpp:69:9: warning: unused variable 'j' [-Wunused-variable]
   69 |  int i, j;
      |         ^

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