UVALive 6426
/**
题意:给一个n*m的矩阵,求某一个区间的数的数量
做法:刚开始想用树状数组,但是RE,题目中说数据是从二进制流中读入,
用scanf会挂掉 所以用fread
读入 size_t fread(void array[],size_t size ,size_t count,stream);
array[] 用与接受数据的内存的地址
size 用于读取的字节数,单位是字节
count 要进行读写多少个size字节的数据项,每个元素是size字节
stream :输入流
long long a;
fread(&a,sizeof(long long),1,stdin);
char ch[10];
fread(ch,sizeof(char),10,stdin);
**/
#include <iostream>
#include <algorithm>
#include <stdio.h>
#include <string.h>
#include <vector>
#include <cmath>
using namespace std;
int a[][];
int main()
{
int n,m;
int c;
fread(&n,sizeof(int),,stdin);
fread(&m,sizeof(int),,stdin);
for(int i=;i<n;i++)
{
fread(a[i],sizeof(int),m,stdin);
}
int l,r;
int last = m;
while(fread(&l,sizeof(int),,stdin))
{
fread(&r,sizeof(int),,stdin);
int ans = ;
for(int i=;i<n;i++)
{
if(a[i][] > r) break;
int ll = lower_bound(a[i],a[i]+last,l)-a[i];
int rr = upper_bound(a[i],a[i]+last,r) -a[i];
if(rr <= ll) continue;
ans += rr - ll;
}
printf("%d\n",ans);
}
return ;
}
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