本题解与Luogu同步
Solution
考虑,若出现过就\(+1\),便是最优答案。
因为右边\(+1\)并不会影响左边
记得多组数据归零变量!
Code
#include<cstdio>
#include<cstring>
#include<iostream>
#include<algorithm>
using namespace std;
int a[100007];
bool vis[200007];
int t, n, ans;
int main()
{
scanf("%d", &t);
while(t--)
{
ans = 0;
scanf("%d", &n);
memset(a, 0, sizeof(a));
memset(vis, 0 ,sizeof(vis));
for(int i = 1; i <= n; i++)
{
scanf("%d", &a[i]);
if(vis[a[i]] == false)
{
vis[a[i]] = true;
ans++;
}
else
{
if(vis[a[i] + 1] == false)
{
vis[a[i] + 1] = true;
ans++;
}
}
}
printf("%d\n", ans);
}
return 0;
}