Submission #1023153

#	Time	Username	Problem	Language	Result	Execution time	Memory
1023153		Mr_Ph	Comparing Plants (IOI20_plants)	C++17	0 / 100	1 ms	600 KiB

plants

#include "plants.h"
#include <bits/stdc++.h>
// #include "grader.cpp"
using namespace std;
vector<int>pref;
int N;
int get(int l,int r)
{
	if(l<=r)
		return pref[r]-(l?pref[l-1]:0);
	else
		return pref[N-1]-pref[r-1]+(l?pref[l-1]:0);
}
void init(int k, std::vector<int> r) {
	N=r.size();
	pref.resize(N);
	pref[0]=r[0];
	for(int i=1;i<N;i++)
		pref[i]=pref[i-1]+r[i];
}

int compare_plants(int x, int y) {
	int l=x,r=y-1;
	int l1=(x==0?N-1:x-1),r1=y;
	if(get(l,r)==0)return 1;
	if(get(l1,r1)==(abs(l1-r1)+1))return 1;
	if(get(l,r)==(r-l)+1)return -1;
	if(get(l1,r1)==0)return -1;
	return 0;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 14
• Subtask 3: 0 / 13
• Subtask 4: 0 / 17
• Subtask 5: 0 / 11
• Subtask 6: 0 / 15
• Subtask 7: 0 / 25