mirror of
https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
102 lines
2.0 KiB
C++
102 lines
2.0 KiB
C++
#include<iostream>
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#include<string>
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#include<algorithm>
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#include<cstdlib>
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#include<cstdio>
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#include<set>
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#include<map>
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#include<vector>
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#include<cstring>
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#include<stack>
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#include<cmath>
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#include<queue>
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using namespace std;
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#define CL(x,v); memset(x,v,sizeof(x));
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#define INF 0x3f3f3f3f
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#define LL long long
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#define REP(i,r,n) for(int i=r;i<=n;i++)
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#define RREP(i,n,r) for(int i=n;i>=r;i--)
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const int MAXN=1e5+100;
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int tree[MAXN];
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int n;
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int lowbit(int x)
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{
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return x&(-x);
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}
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void add(int pos,int val)
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{
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while(pos <=n)
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{
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tree[pos] += val;
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pos += lowbit(pos);
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}
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}
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int read(int x)
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{
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int s=0;
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while(x>0)
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{
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s += tree[x];
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x -= lowbit(x);
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}
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return s;
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}
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int A[MAXN],pos[MAXN];
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struct node{
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int l,r,index;
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bool operator <(const node& rsh)const{
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if(r==rsh.r)
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return l<rsh.l;
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else return r<rsh.r;
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}
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};
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vector<node> Q;
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int ans[MAXN];
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int main()
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{
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int T;
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scanf("%d",&T);
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while(T--)
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{
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int m;
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scanf("%d%d",&n,&m);
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REP(i,1,n){
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scanf("%d",&A[i]);
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pos[A[i]]=i;
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}
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Q.clear();
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node tmp;
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REP(i,1,m)
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{
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scanf("%d%d",&tmp.l,&tmp.r);
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tmp.index=i;
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Q.push_back(tmp);
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}
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sort(Q.begin(),Q.end());
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CL(tree,0);
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int j=0;
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for(int i=1;i<=n;i++)
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{
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add(i,1);
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if(A[i]+1<=n&&pos[A[i]+1]<i)
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{
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add(pos[A[i]+1],-1);
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}
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if(A[i]-1>=1&&pos[A[i]-1]<i)
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{
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add(pos[A[i]-1],-1);
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}
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while(Q[j].r==i)
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{
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ans[Q[j].index]=read(Q[j].r)-read(Q[j].l-1);
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j++;
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}
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}
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REP(i,1,m)
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{
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printf("%d\n",ans[i]);
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}
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}
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return 0;
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}
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