Submission #421308

#	Time	Username	Problem	Language	Result	Execution time	Memory
421308		JUANDI321	Comparing Plants (IOI20_plants)	C++17	0 / 100	1 ms	300 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;
	sumpf[1] = 200010;
	//cout<<sumpf[1]<<" ";
	//copyr[0] = r[0];
	for(int i = 1; i<r.size(); i++)
	{
		sumpf[i+1]=sumpf[i]+r[i];
		if(r[i]==0)sumpf[i+1]--;
		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;
	}
	x++;
	y++;
	int dis = y-x+1;
	//cout<<dis<<endl;
	//cout<<sumpf[y]-sumpf[x-1]<<endl;
	if(sumpf[y]-sumpf[x-1] == dis)return 1;
	if(sumpf[y]-sumpf[x-1] == -1*dis)return -1;
	return 0;
}

Compilation message (stderr)

plants.cpp: In function 'void init(int, std::vector<int>)':
plants.cpp:16:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |  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