水。
#include<iostream>
#include<cstdio>
using namespace std;int main()
{
int n,a[];
cin >> n;
for(int i = ;i <= n;i++) cin >> a[i];
int now = a[],num = ;
for(int i = ;i <= n;i++)
{
if(now != a[i])
{
num++;
now = a[i];
}
}
cout << num << endl;
}
水。
#include<iostream>
#include<cstdio>
using namespace std;int main()
{
int n,a[];
cin >> n;
for(int i = ;i <= n;i++) cin >> a[i];
int now = a[],num = ;
for(int i = ;i <= n;i++)
{
if(now != a[i])
{
num++;
now = a[i];
}
}
cout << num << endl;
}
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