UVa : 846


// @BEGIN_OF_SOURCE_CODE

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <cstring>
#include <string>
#include <cctype>
#include <stack>
#include <queue>
#include <vector>
#include <map>
#include <sstream>
#include <set>
#include <math.h>
#define N 1000000
using namespace std;


int main ()
{
    int testCase;
    scanf ("%d", &testCase);

    while ( testCase-- ) {
        int x;
        int y;

        scanf ("%d %d", &x, &y);

        int diff = y - x;
        int count = 0;
        int start = 1;
        bool flag = false;

        while ( diff > 0 ) {
            diff -= start;
            count++;
            if ( flag )
                start++;
            flag = !flag;
        }

        printf ("%d\n", count);
    }

    return 0;
}

// @END_OF_SOURCE_CODE
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