Submission #303539

#	Time	Username	Problem	Language	Result	Execution time	Memory
303539		leejseo	Comparing Plants (IOI20_plants)	C++17	5 / 100	115 ms	5880 KiB

plants

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

int N, K;
int R[200005];
int _P[200005];
int *P = _P+1;

void init(int k, vector<int> r) {
	K = k;
	N = r.size();
	for (int i=0; i<N; i++) R[i] = r[i];
	for (int i=0; i<N; i++){
		if (R[i] != R[(i+1)%N]) P[(i+1)%N]++;
	}
	for (int i=0; i<N; i++){
		P[i+1] += P[i];
	}
}

int compare_plants(int x, int y) {
	// [x, y)
	if (P[x] == P[y-1]){
		// 증감 같은 구간
		return R[x] == 1 ? -1 : 1;
	}
	else if (P[y] == P[N-1] && P[x-1] == 0){
		// 사이에 N 끼는 증감 같은 구간
		return R[y] == 1 ? 1 : -1;
	}
	return 0;
}

• Subtask 1: 5 / 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