Submission #708128

#	Time	Username	Problem	Language	Result	Execution time	Memory
708128		arcane	Bigger segments (IZhO19_segments)	C++17	0 / 100	1 ms	448 KiB

segments

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define fi first
#define se second
#define mp make_pair
#define pb emplace_back
int32_t main(){
	ios::sync_with_stdio(false);
	cin.tie(0); cout.tie(0);
	int n, ans = 0, tmp1 = -1e8, tot, pos; cin >> n;
	int arr[n], smol[n], pref[n + 1]; 
	for (int i = 0; i < n; i++) cin >> arr[i];
	pref[0] = 0;
	for (int i = 0; i < n; i++) pref[i + 1] = pref[i] + arr[i];
	for (int i = 0; i < n; i++){
		smol[i] = pref[i + 1];
		for (int j = i - 1; j >= 0; j--){
			if (pref[i + 1] - pref[j + 1] >= smol[j]) smol[i] = min(smol[i], pref[i + 1] - pref[j + 1]);
		}
		assert(pref[i + 1] + smol[i] >= tmp1);
		tmp1 = pref[i + 1] + smol[i];
	}
	tot = pref[n] - smol[n - 1]; pos = n - 1; ans = 1;
	while (tot){
		while (pref[pos + 1] != tot){
			pos--;
			//cerr << pos << '\n';
		}
		tot -= smol[pos]; ans += 1; 
	}
	cout << ans << '\n';
}

• Subtask 1: 0 / 13
• Subtask 2: 0 / 14
• Subtask 3: 0 / 10
• Subtask 4: 0 / 36
• Subtask 5: 0 / 27