#include
#include
void GetPos(int w, int n, int& x, int& y) {
x = (n-1) / w + 1;
y = n % w;
if (y == 0) y = w;
if (x%2 == 0) {
y = w - y + 1;
}
}
int main() {
int w, m, n;
int x1, y1, x2, y2;
scanf("%d %d %d",&w,&m,&n);
GetPos(w, m, x1, y1);
GetPos(w, n, x2, y2);
printf("%d",abs(x1-x2) + abs(y1-y2) );
return 0;
}
//void GetPos(int w, int n, int& x, int& y) 为什么要多个&,没有&这个怎么输出不一样