Submission #421318

#	Time	Username	Problem	Language	Result	Execution time	Memory
421318		JUANDI321	Comparing Plants (IOI20_plants)	C++17	0 / 100	1 ms	204 KiB

plants

#include "plants.h"
#include <vector>
#include <iostream>

using namespace std;
int sumpf[200010], copyr[20010];
int n;

void init(int k, vector<int> r) 
{
	n = r.size();
	sumpf[0] = 200010;
	//cout<<sumpf[1]<<" ";
	copyr[0] = r[0];
	for(int i = 1; i < r.size(); i++)
	{
		sumpf[i] = sumpf[i-1] + r[i-1];
		if(r[i-1] == 0) sumpf[i]--;
		copyr[i] = r[i];
	//	cout<<sumpf[i+1]<<" ";
	}
	//cout<<endl;
	return;
}
int compare_plants(int x, int y) {
	if(x == 0 && y == n-1)
	{
		if(copyr[n-1] == 1) return 1;
		return -1;
	}
	int dis = y-x+1;
	//cout<<dis<<endl;
	//cout<<sumpf[y]-sumpf[x-1]<<endl;
	int sum = sumpf[y] - sumpf[x-1];
	if(x == 0)sum = sumpf[y];
	if(sum == dis) return 1;
	if(sum == -1 * dis) return -1;
    
	dis = n - y + x +1;
	sum = sumpf[n-1] - sumpf[y-1] + sumpf[x];
	//if(x == 0)sum = sumpf[y];
	if(sum == dis) return 1;
	if(sum == -1 * dis) return -1;
	
	return 0;
}

Compilation message (stderr)

plants.cpp: In function 'void init(int, std::vector<int>)':
plants.cpp:15:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |  for(int i = 1; i < r.size(); 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