1 // luogu-judger-enable-o2
2 #include<cstdio>
3 #include<iostream>
4 using namespace std;
5 const int maxn=1e7+10;
6 const int inf=2e7+7;
7 struct node
8 {
9 int x,y,id,ans,time;
10 }a[maxn],b[maxn],tt[maxn];;
11 int flag;
12 int len,x,y;
13 int n,q;
14 struct XX
15 {
16 int c[maxn];
17 int lowbit(int x)
18 {
19 return x&(-x);
20 }
21 void update(int x,int w)
22 {
23 for(;x<=len;x+=lowbit(x))
24 {
25 c[x]=max(w,c[x]);
26 }
27 }
28 int sum(int x)
29 {
30 int res=0;
31 for(;x;x-=lowbit(x))
32 {
33 res=max(res,c[x]);
34 }
35 if(res)
36 {
37 return res;
38 }
39 else
40 return -inf;
41 }
42 void clear(int x)
43 {
44 for(;c[x];x+=lowbit(x))
45 {
46 c[x]=0;
47 }
48 }
49 }XX;
50 void CDQ(int l,int r)
51 {
52 if(l == r) return;
53 int mid =(l+r)>>1;
54 CDQ (l,mid);
55 CDQ(mid+1,r);
56 int t1=l;
57 int t2=mid+1;
58 int k=l;
59 while(t2<=r)
60 {
61 while(t1<=mid&&b[t1].x<=b[t2].x)
62 {
63 if(b[t1].time==1)
64 {
65 XX.update(b[t1].y,b[t1].x+b[t1].y);
66 }
67 tt[k++]=b[t1++];
68 }
69 if(b[t2].time==2)
70 {
71 a[b[t2].id].ans=min(a[b[t2].id].ans,b[t2].x+b[t2].y-XX.sum(b[t2].y));
72 }
73 tt[k++]=b[t2++];
74 }
75 for(int i=l;i<=t1-1;i++)
76 {
77 if(b[i].time==1)
78 {
79 XX.clear(b[i].y);
80 }
81 }
82
83 while(t1<=mid)
84 {
85 tt[k++]=b[t1++];
86 }
87 for(int i=l;i<=r;i++)
88 {
89 b[i]=tt[i];
90 }
91 }
92 void solve(int x1,int y1)
93 {
94 for(int i=1;i<=n+q;i++)
95 {
96 b[i]=a[i];
97 if(x1)
98 {
99 b[i].x=len-b[i].x;
100 }
101 if(y1)
102 {
103 b[i].y=len-b[i].y;
104 }
105 }
106 CDQ(1,n+q);
107 }
108 int main()
109 {
110 scanf("%d%d",&n,&q);
111 for(int i=1;i<=n;i++)
112 {
113 scanf("%d%d",&x,&y);
114 a[i].time=1;
115 a[i].id=i;
116 a[i].x=++x;
117 a[i].y=++y;
118 len=max(len,max(x,y));
119 }
120 for(int i=n+1;i<=n+q;i++)
121 {
122 scanf("%d%d%d",&flag,&x,&y);
123 a[i].time=flag;
124 a[i].id=i;
125 a[i].x=++x;
126 a[i].y=++y;
127 a[i].ans=inf;
128 len=max(len,max(x,y));
129 }
130 len++;
131 solve(0,0);
132 solve(0,1);
133 solve(1,0);
134 solve(1,1);
135 for(int i=n+1;i<=n+q;i++)
136 {
137 if(a[i].time ==2)
138 {
139 printf("%d\n",a[i].ans);
140 }
141 }
142 return 0;
143 }
