Submission #96670

#TimeUsernameProblemLanguageResultExecution timeMemory
96670Rouge_HugoUnija (COCI17_unija)C++14
0 / 100
357 ms22076 KiB
#include <bits/stdc++.h>
using namespace std;

int a[10000009];
int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	
	int x,y;
	int n;cin>>n;
	for(int i=0;i<n;i++)
	{
		cin>>x>>y;
		x/=2;
		y/=2;
		a[y]=x;
	}
	int sum=0;
	for(int i=1;i<10000007;i++)
	{
		if (a[i]>a[i-1])
		{
			sum+=(a[i]-a[i-1])*(i-1)+a[i];
		}
		else sum+=a[i];
	}
	cout<<sum*4;

 return 0;

}
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