HDU 1030 Delta-wave（找规律）

#include<stdio.h>
#include<math.h>
int main ()
{
    int m, n, mx, nx, mly, nly, mry, nry, ans, t;

    while(scanf("%d%d", &m, &n) != EOF)
    {
        if (m > n) 
        {
            t = m;
            m = n;
            n = t;
        }

        mx = (int)sqrt(m); ///计算行（横坐标）
        nx = (int)sqrt(n);

        if (mx * mx < m) mx++;
        if (nx * nx < n) nx++;

        mly = (m-(mx-1)*(mx-1)+1)/2;
        nly = (n-(nx-1)*(nx-1)+1)/2; ///计算从左边起的列（纵坐标）
        mry = (mx*mx-m)/2+1;
        nry = (nx*nx-n)/2+1; ///计算从右边起的列

        ans = fabs(mx-nx) + fabs(mly-nly) + fabs(mry-nry); ///两个点之间的最短距离就是横坐标绝对值和纵坐标绝对值之和

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

    return 0;
}