HDU - 5997 树状数组+set

和之前一道省选题目很像；

（梦幻布丁）；

我们维护的时候用树状数组维护，在断电处打上标记；

合并的时候小的合并到大的里面；

#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cstdlib>
#include<cstring>
#include<string>
#include<cmath>
#include<map>
#include<set>
#include<vector>
#include<queue>
#include<bitset>
#include<ctime>
#include<deque>
#include<stack>
#include<functional>
#include<sstream>
//#include<cctype>
//#pragma GCC optimize(2)
using namespace std;
#define maxn 200005
#define inf 0x7fffffff
//#define INF 1e18
#define rdint(x) scanf("%d",&x)
#define rdllt(x) scanf("%lld",&x)
#define rdult(x) scanf("%lu",&x)
#define rdlf(x) scanf("%lf",&x)
#define rdstr(x) scanf("%s",x)
typedef long long  ll;
typedef unsigned long long ull;
typedef unsigned int U;
#define ms(x) memset((x),0,sizeof(x))
const long long int mod = 1e9;
#define Mod 1000000000
#define sq(x) (x)*(x)
#define eps 1e-5
typedef pair<int, int> pii;
#define pi acos(-1.0)
//const int N = 1005;
#define REP(i,n) for(int i=0;i<(n);i++)
typedef pair<int, int> pii;

inline int rd() {
	int x = 0;
	char c = getchar();
	bool f = false;
	while (!isdigit(c)) {
		if (c == '-') f = true;
		c = getchar();
	}
	while (isdigit(c)) {
		x = (x << 1) + (x << 3) + (c ^ 48);
		c = getchar();
	}
	return f ? -x : x;
}

ll gcd(ll a, ll b) {
	return b == 0 ? a : gcd(b, a%b);
}
int sqr(int x) { return x * x; }

/*ll ans;
ll exgcd(ll a, ll b, ll &x, ll &y) {
	if (!b) {
		x = 1; y = 0; return a;
	}
	ans = exgcd(b, a%b, x, y);
	ll t = x; x = y; y = t - a / b * y;
	return ans;
}
*/
int T; int n, q;
set<int>st[1000005];
int a[maxn];
int c[maxn];
int fa[1000005];
void add(int x, int val) {
	while (x <= n) {
		c[x] += val; x += x & -x;
	}
}
int query(int x) {
	int ans = 0;
	while (x > 0) {
		ans += c[x]; x -= x & -x;
	}
	return ans;
}
void upd(int x, int y) {
	for (auto cnt : st[x]) {
		if (a[cnt - 1] == y)add(cnt, -1);
		if (a[cnt + 1] == y)add(cnt + 1, -1);
		st[y].insert(cnt);
	}
	for (auto cnt : st[x])a[cnt] = y;
	st[x].clear();
}

int main()
{
	//ios::sync_with_stdio(0);
	T = rd();
	while (T--) {
		rdint(n); rdint(q);
		for (int i = 0; i <=1000002; i++)st[i].clear();
		ms(fa); ms(c); ms(a);
		for (int i = 1; i <= n; i++) {
			rdint(a[i]);
		}
	//	st[a[1]].insert(1);
		for (int i = 1; i <= n; i++) {
			fa[a[i]] = a[i];
			if (a[i] != a[i - 1])add(i, 1);
			st[a[i]].insert(i);
		}
		while (q--) {
			int opt; rdint(opt);
			if (opt == 1) {
				int x, y; rdint(x); rdint(y);
				if (x == y)continue;
				if (st[fa[x]].size() > st[fa[y]].size())swap(fa[x], fa[y]);
				x = fa[x]; y = fa[y];
				upd(x, y);
			}
			else {
				int x, y; rdint(x); rdint(y);
				int ans = query(y) - query(x - 1) + (a[x] == a[x - 1]);
				printf("%d\n", ans);
			}
		}
	}
	return 0;
}