Submission #771761

#	Time	Username	Problem	Language	Result	Execution time	Memory
771761		khshg	Comparing Plants (IOI20_plants)	C++14	0 / 100	1 ms	300 KiB

plants

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

vector<int> know, r;
int N;
int goR = 0;

void init(int k, vector<int> _r) {
	swap(r, _r);
	N = (int)r.size();
	for(int i = 0; i + 1 < N; ++i) {
		if(r[i] != r[i + 1] && r[i + 1]) {
			goR = N - 1 - i;
			break;
		}
	}
	rotate(r.rbegin(), r.rbegin() + goR, r.rend());
	int cnt = 0;
	for(int i = 1; i < N; ++i) {
		cnt += (r[i - 1] != r[i] && r[i - 1]);
	}
	if(cnt == 1) {
		for(int i = 0; r[i]; ++i) {
			know.push_back(i);
		}
		for(int i = N - 1; know.size() + 1 < N; --i) {
			know.push_back(i);
		}
	}
	return;
}

int compare_plants(int x, int y) {
	x += goR;
	y += goR;
	x %= N;
	y %= N;
	if((int)know.size()) {
		return know[x] < know[y] ? -1 : 1;
	}
	if(x == 0 && y == N - 1) return r[y] ? 1 : -1;
	if(y - x > 1) {
		return 0;
	}
	return r[x] ? -1 : 1;
}

Compilation message (stderr)

plants.cpp: In function 'void init(int, std::vector<int>)':
plants.cpp:27:38: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   27 |   for(int i = N - 1; know.size() + 1 < N; --i) {
      |                      ~~~~~~~~~~~~~~~~^~~

• 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