#include<cstdio>

#include<cstdlib>

#include<iostream>

#include<algorithm>

#include<string.h>

using namespace std;

float maps[];

float mapss[];

int main()

{

    int n,x;

    float y,aa;

    int aN=;

    cin>>n;

    while (n--)

    {

        cin>>x>>y;

        maps[x] = y;

    }

    cin>>n;

    while (n--)

    {

        cin>>x>>y;

        for (int i = ; i >= ; i--)

        {

            aa=mapss[x+i];

            mapss[x+i] += maps[i] * y;

            if(aa ==  && mapss[x+i] != )

                aN++;

            else if(aa !=  && mapss[x+i] == )

                aN--;

        }

    }

    if(aN == )

    {

        cout<<aN;

        return ;

    }

    else

    {

        cout<<aN<<" ";

    }

    for (int i = ; i >= ; i--)

    {

        if(aN ==  && mapss[i] != )

        {

            printf("%d %.1f",i,mapss[i]);

            break;

        }

        else if(mapss[i] != )

        {

            printf("%d %.1f ",i,mapss[i]);

            aN--;

        }

    }

    return ;

}