seerc2013 C 关于fread读入

输入很大，之前完全不知道fread

#include<iostream>#include<cstdio>#include<algorithm>#include<vector>#include<cstring>#include <fstream>using namespace std;int m,n;int a[10005][10005];int main(){    int c;    fread(&n,sizeof(n),1,stdin);    fread(&m,sizeof(m),1,stdin);    for(int i=0;i<n;i++)    {        fread(a[i],sizeof(int),m,stdin);    }    int l,r;    while(fread(&l,sizeof(l),1,stdin)!=0)    {        fread(&r,sizeof(r),1,stdin);        int last=m;        int ans=0;        for(int i=0;i<n;i++)        {            if(a[i][0]>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];            last=rr;            //cout<<ll<<" "<<rr<<endl;            if(rr<=ll)continue;            ans+=rr-ll;        }        printf("%d\n",ans);    }    return 0;}