poj2590

简单题，注意判断0

#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
using namespace std;

int main()
{
    //freopen("t.txt", "r", stdin);
    int t;
    scanf("%d", &t);
    while (t--)
    {
        int a, b;
        scanf("%d%d", &a, &b);
        int c = abs(b - a);
        if (c == 0)
        {
            printf("0\n");
            continue;
        }
        int x = ceil(sqrt(c));
        while (x * x >= c)
            x--;
        int y = c - x * x;
        if (y <= x)
            printf("%d\n", x * 2);
        else
            printf("%d\n", x * 2 + 1);
    }
    return 0;
}