5个测试点RE

#include <stdio.h>
#include <cstdlib>
#include <iostream>
#include <math.h>
#include <time.h>
#include <sstream>
#include <string.h>
#include <list>
#include <algorithm>
using namespace std;
long long a,b,c[2000010],d[2000010],e,f=0,g,h[1100],h1=1, x,y,z;
int main()
{
    cin>>a>>b;
    for(x=1;x<=a*b;++x)
    {
        cin>>c[x]>>d[x];
        if(c[x])
            ++h[h1];
        if(x%b==0)
            ++h1;
    }
    cin>>e;
    ++e;
    for(x=1;x<=a;++x,--e)
    {
        f+=d[e+(x-1)*b];
        if(d[e+(x-1)*b]%h[x])
            g=d[e+(x-1)*b]%h[x];
        else
            g=h[x];
        for(y=0;y<g;++e)
        {
            if(e==b+1)
                e=1;
            if(c[e+(x-1)*b])
                ++y;
        }
        f%=20123;
    }
    cout<<f;
    return 0;
}