Submission #940842

#	Time	Username	Problem	Language	Result	Execution time	Memory
940842		Lalic	Shortcut (IOI16_shortcut)	C++17	38 / 100	2040 ms	604 KiB

shortcut

#include "shortcut.h"
#include <bits/stdc++.h>
using namespace std;

#define pb push_back
#define fi first
#define se second
#define all(x) x.begin(), x.end()
#define allr(x) x.rbegin(), x.rend()
#define mp make_pair

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 1e5+10;
const int INF = 0x3f3f3f3f;
const ll LINF = 0x3f3f3f3f3f3f3f3f;
const int MOD = 1e9+7;

long long find_shortcut(int n, vector<int> l, vector<int> d, int c)
{	
	vector<ll> s(n); s[0]=0;
	for(int i=1;i<n;i++) s[i]=s[i-1]+l[i-1];
	
	ll ans=LINF;
    for(int i=0;i<n-1;i++){
		int low=i+1, high=n;
		ll resp=LINF;
		
		while(low<=high){
			int mid=(low+high)>>1;
			
			ll mx=0, id=-1;
			for(int j=0;j<n-1;j++)
				for(int k=j+1;k<n;k++)
					if((ll)d[j]+(ll)d[k]+min(s[k]-s[j], abs(s[j]-s[i])+abs(s[k]-s[mid])+c)>mx)
						mx=(ll)d[j]+(ll)d[k]+min(s[k]-s[j], abs(s[j]-s[i])+abs(s[k]-s[mid])+c), id=k;
			
			resp=min(resp, mx);
			
			if(id<=mid) high=mid-1;
			else low=mid+1;
		}
		
		ans=min(ans, resp);
	}
	
	return ans;
}

• Subtask 1: 9 / 9
• Subtask 2: 14 / 14
• Subtask 3: 8 / 8
• Subtask 4: 7 / 7
• Subtask 5: 0 / 33
• Subtask 6: 0 / 22
• Subtask 7: 0 / 4
• Subtask 8: 0 / 3