```c
#include <stdio.h>
#include <stdlib.h>
int main()
{
int **square;
int n, i, j, a, b;
int count = 1;
scanf("%d%d%d", &n, &a, &b);
square = (int**)calloc(n+1, sizeof(int*));
for(i = 0; i <= n; i++)
{
square[i] = (int*)calloc(n+1, sizeof(int));
}
for(i = 0; i <= n; i++)
{
square[i][n] = 1;
}
for(j = 0; j <= n; j++)
{
square[n][j] = 1;
}
i = 0;
j = -1;
while(count != n * n + 1)
{
while(square[i][j+1] == 0)//向右
{
j++;
square[i][j] = count;
count++;
}
while(square[i+1][j] == 0)//向下
{
i++;
square[i][j] = count;
count++;
}
while(j != 0 && square[i][j-1] == 0)//向左
{
j--;
square[i][j] = count;
count++;
}
while(i != 0 && square[i-1][j] == 0)//向上
{
i--;
square[i][j] = count;
count++;
}
}
printf("%d", square[a-1][b-1]);
for(i = 0; i <= n; i++)
{
free(square[i]);
}
free(square);
return 0;
}
```
by jxy_1999 @ 2019-01-12 11:51:20
~~好好的一道**数论**咋被弄成了**暴力**QAQ~~
by Liveddd @ 2019-01-12 11:54:20
@[Kevin·HAN](/space/show?uid=109659) 脑子不好使…………求指点
by jxy_1999 @ 2019-01-12 11:58:40
@[jxy_1999](/space/show?uid=16025) 说实话这题我也是看着题解写的（~~那不然我这么蒻的人怎么会去推公式QAQ~~），也许你看看题解会有更多思路QAQ
by Liveddd @ 2019-01-12 12:05:24