模板到不行。。连更新都没有。。。存个模板。

理解留到小结的时候再写。

#include <algorithm>
#include <iostream>
#include <cstring>
#include <cstdlib>
#include <cstdio>
#include <queue>
#include <cmath>
#include <stack>
#include <map>

#pragma comment(linker, "/STACK:1024000000");
#define EPS (1e-8)
#define LL long long
#define ULL unsigned long long
#define _LL __int64
#define _INF 0x3f3f3f3f
#define Mod 9999991
#define lowbit(x) (x&(-x))

using namespace std;

struct N
{
    int Min,Max;
}st[1200][1200];

int num[310][310];

void Init_Y(int s1,int s2,int l,int r,int t,int b)
{

    if(t == b)
    {
        if(l == r)
        {
            st[s1][s2].Max = num[l][t];
            st[s1][s2].Min = num[l][t];
        }
        else
        {

            st[s1][s2].Max = max(st[s1<<1][s2].Max,st[s1<<1|1][s2].Max);
            st[s1][s2].Min = min(st[s1<<1][s2].Min,st[s1<<1|1][s2].Min);
        }
        return ;
    }

    int mid = (t+b)>>1;

    Init_Y(s1,s2<<1,l,r,t,mid);
    Init_Y(s1,s2<<1|1,l,r,mid+1,b);

    st[s1][s2].Max = max(st[s1][s2<<1].Max,st[s1][s2<<1|1].Max);
    st[s1][s2].Min = min(st[s1][s2<<1].Min,st[s1][s2<<1|1].Min);
}

void Init_X(int s1,int s2,int l,int r,int t,int b)
{
    if(l != r)
    {
        int mid = (l+r)>>1;

        Init_X(s1<<1,s2,l,mid,t,b);
        Init_X(s1<<1|1,s2,mid+1,r,t,b);
    }

    Init_Y(s1,s2,l,r,t,b);
}

N Query_Y(int s1,int s2,int L,int R,int T,int B,int l,int r,int t,int b)
{
    if(T == t && B == b)
        return st[s1][s2];

    int mid = (T+B)>>1;

    if(b <= mid)
        return Query_Y(s1,s2<<1,L,R,T,mid,l,r,t,b);
    else if(mid < t)
        return Query_Y(s1,s2<<1|1,L,R,mid+1,B,l,r,t,b);
    N temp,t1,t2;

    t1 = Query_Y(s1,s2<<1,L,R,T,mid,l,r,t,mid);
    t2 = Query_Y(s1,s2<<1|1,L,R,mid+1,B,l,r,mid+1,b);

    temp.Max = max(t1.Max,t2.Max);
    temp.Min = min(t1.Min,t2.Min);
    return temp;
}

N Query_X(int s1,int s2,int L,int R,int T,int B,int l,int r,int t,int b)
{
    if(L == l && R == r)
    {
        return Query_Y(s1,s2,L,R,T,B,l,r,t,b);
    }

    int mid = (L+R)>>1;

    if(r <= mid)
        return Query_X(s1<<1,s2,L,mid,T,B,l,r,t,b);
    else if(mid < l)
        return Query_X(s1<<1|1,s2,mid+1,R,T,B,l,r,t,b);
    N temp,t1,t2;
    t1 = Query_X(s1<<1,s2,L,mid,T,B,l,mid,t,b);
    t2 = Query_X(s1<<1|1,s2,mid+1,R,T,B,mid+1,r,t,b);
    temp.Max = max(t1.Max,t2.Max);
    temp.Min = min(t1.Min,t2.Min);
    return temp;
}

int main()
{
    int n,m,k,b,i,j,x,y;

    scanf("%d %d %d",&n,&b,&k);

    for(i = 1;i <= n; ++i)
    {
        for(j = 1;j <= n; ++j)
        {
            scanf("%d",&num[i][j]);
        }
    }

    Init_X(1,1,1,n,1,n);

    while(k--)
    {
        scanf("%d %d",&x,&y);

        N temp = Query_X(1,1,1,n,1,n,x,min(n,x+b-1),y,min(n,y+b-1));

        printf("%d\n",temp.Max-temp.Min);
    }

    return 0;
}