代码

#include<iostream>
#include<cstdio>
using namespace std;
int main() 
{
	int n=0;
	int day=0;
	cin>>n;
	int d[100000];
	for(int i=1;i<=n;i++)//the road
	{
		cin>>d[i];
	}
	day=d[1];
	for (int i=1;i<n;i++)
	{
        if(d[i+1]>d[i])
		{
			day=day+d[i+1]-d[i];
		}
	}
	cout<<day;
	return 0;
}

评测结果