Submission #762545

#	Time	Username	Problem	Language	Result	Execution time	Memory
762545		MODDI	Bigger segments (IZhO19_segments)	C++14	0 / 100	14 ms	35524 KiB

segments

#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define mp make_pair
typedef long long ll;
typedef pair<long long, long long> pll;
typedef pair<int,int> pii;
typedef vector<long long> vl;
typedef vector<int> vi;
int n;
vi arr;
int dp[3001][3001]; // maximum number of segments if we are at the ith position and the last segment begun at j
int main(){
	cin>>n;
	arr.resize(n);
	for(int i = 0; i < n; i++)
		cin>>arr[i];
	
	ll pref[n];
	pref[0] = arr[0];
	for(int i = 1; i < n; i++)	pref[i] = pref[i-1] + arr[i];
	memset(dp, 0, sizeof dp);
	dp[0][0] = 1;
	for(int i = 1; i < n; i++){
		for(int j = i; j >= 0; j--){
			for(int k = j - 1; k >= 0; k--){
				ll sumL = pref[j-1], sumR = pref[i];
				if(j > 0)	sumR -= pref[j-1];
				if(k > 0) 	sumL -= pref[k-1];
				if(sumR >= sumL)
					dp[i][j] = max(dp[i][j], dp[j-1][k] + 1);
				
//				cout<<i<<" "<<j<<" "<<sumR<<endl;
//				cout<<j-1<<" "<<k<<" "<<sumL<<endl;
//				cout<<"DP: "<<dp[i][j]<<endl;
			}
		}
	}
	int ans = 0;
	for(int i = 0; i < n; i++){
		ans = max(ans, dp[n-1][i]);
	}
	cout<<ans<<endl;
	return 0;
}

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