Submission #428414

#	Time	Username	Problem	Language	Result	Execution time	Memory
428414		kshitij_sodani	Shortcut (IOI16_shortcut)	C++14	71 / 100	2093 ms	2092 KiB

shortcut

#include <bits/stdc++.h>
using namespace std;
typedef long long llo;
#define a first
#define b second
#define pb push_back


#include "shortcut.h"
llo pre[1000001];
int n;
llo it[1000001];
llo ss;
llo ma[2][2];
bool check(llo mid){

	llo ma=-1e18;
	llo ma2=-1e18;
	llo ma3=-1e18;
	llo ma4=-1e18;
	llo st=1;
	for(int i=0;i<n;i++){
		for(int j=i+1;j<n;j++){
			/*if(i==1 and j==3){
				cout<<pre[j]-pre[i]+it[i]+it[j]<<":"<<endl;
			}*/
			if(pre[j]-pre[i]+it[i]+it[j]>mid){
				st=0;
				ma=max(ma,pre[i]+pre[j]+it[i]+it[j]);
				ma2=max(ma2,pre[i]-pre[j]+it[i]+it[j]);
				ma3=max(ma3,-pre[i]-pre[j]+it[i]+it[j]);
				ma4=max(ma4,-pre[i]+pre[j]+it[i]+it[j]);
			}
		}
	}
	if(st==1){
		return true;
	}
	//return false;
	ma=mid-ma-ss;
	ma=-ma;
	ma2=mid-ma2-ss;
	ma2=-ma2;
	ma3=mid-ma3-ss;
	ma4=mid-ma4-ss;
	//-pre[i]-pre[j]<=ma
	//pre[i]+pre[j]>=ma
	//pre[i]+pre[j]<=ma3

	//-pre[i]+pre[j]<=ma2
	//pre[i]-pre[j]>=ma2
	//pre[i]-pre[j]<=ma4


	for(int i=0;i<n;i++){
		for(int j=i+1;j<n;j++){
			if(pre[i]+pre[j]>=ma){
				if(pre[i]+pre[j]<=ma3){
					if(pre[i]-pre[j]>=ma2){
						if(pre[i]-pre[j]<=ma4){
							return true;
						}
					}
				}
			}
		}
	}
	

	//ma to ma3 range





	return false;



}
long long find_shortcut(int nn, std::vector<int> l, std::vector<int> d, int c)
{
	n=nn;
	pre[0]=0;
	ss=c;
	for(int i=1;i<n;i++){
		pre[i]=pre[i-1]+l[i-1];
	}

	for(int i=0;i<n;i++){
		it[i]=d[i];
	}

	llo low=-1;
	for(int i=52;i>=0;i--){
		if(check(low+(1LL<<i))==false){
			low+=(1LL<<i);
		}
	}



    return low+1;
}

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