#include <iostream>
#include <fstream>
#include <iomanip>

using namespace std;

ifstream fin("dulciuri.in");
ofstream fout("dulciuri.out");

const int NMAX = 1e6;

double aibLin[NMAX + 1], aibCol[NMAX + 1];

void updAib(double aib[], int pos, double delta);
double queryAib(double aib[], int pos);


int main()
{
    int nrq, x1, y1, x2, y2, tp, x, y;
    double val, divi;

    fin >> nrq;
    for (int i = 0; i < nrq; i++) {
        fin >> tp;

        if (tp == 1) {
            fin >> x >> val;
            updAib(aibCol, x, val);
        }
        else if (tp == 2) {
            fin >> y >> val;
            updAib(aibLin, y, val);
        }
        else {
            fin >> x1 >> y1 >> x2 >> y2;
            val = 0;

            divi = x1 - x2;
            if (divi < 0)
                divi = -divi;
            if (divi == 0)
                divi = 1;
            val += (queryAib(aibCol, max(x1, x2)) - queryAib(aibCol, min(x1, x2) - 1)) / divi;

            divi = y1 - y2;
            if (divi < 0)
                divi = -divi;
            if (divi == 0)
                divi = 1;

            val += (queryAib(aibLin, max(y1, y2)) - queryAib(aibLin, min(y1, y2) - 1)) / divi;
            fout << setprecision(15) << val << '\n';
        }
    }
    return 0;
}

void updAib(double aib[], int pos, double delta) {
    for (; pos <= NMAX; pos += (pos & -pos))
        aib[pos] += delta;
}

double queryAib(double aib[], int pos) {
    double s = 0;
    for (; pos > 9; pos -= (pos & -pos))
        s += aib[pos];
    return s;
}