2014
02-12

# Romantic

The Sky is Sprite.
The Birds is Fly in the Sky.
The Wind is Wonderful.
Blew Throw the Trees
Trees are Shaking, Leaves are Falling.
Lovers Walk passing, and so are You.
…………………………..Write in English class by yifenfei

Girls are clever and bright. In HDU every girl like math. Every girl like to solve math problem!
Now tell you two nonnegative integer a and b. Find the nonnegative integer X and integer Y to satisfy X*a + Y*b = 1. If no such answer print "sorry" instead.

The input contains multiple test cases.
Each case two nonnegative integer a,b (0<a, b<=2^31)

The input contains multiple test cases.
Each case two nonnegative integer a,b (0<a, b<=2^31)

77 51
10 44
34 79

2 -3
sorry
7 -3

### 转载请注明出处：忆梦http://blog.csdn.net/yimeng2013/article/details/11822563

#include<cstdio>
int x, y;
int gcd(int a,int b)
{// x,y用全局变量保存
int t,d;
if(b==0)
{
x=1;
y=0;
return a;
}
d=gcd(b,a%b);
t=x;
x=y;
y=t-(a/b)*y;
return d;
}

int main ()
{
int a, b;
while(~scanf("%d %d", &a, &b))
{
int d = gcd(a, b);
if(d != 1)
{
printf("sorry\n");
continue;
}

while(x <= 0)
{
x = x + b;
y = y - a;
}
printf("%d %d\n",x, y);
}
return 0;
}

1. 漂亮。佩服。
P.S. unsigned 应该去掉。换行符是n 不是/n
还可以稍微优化一下，
int main() {
int m,n,ai,aj,bi,bj,ak,bk;
while (scanf("%d%d",&m,&n)!=EOF) {
ai = sqrt(m-1);
bi = sqrt(n-1);
aj = (m-ai*ai-1)>>1;
bj = (n-bi*bi-1)>>1;
ak = ((ai+1)*(ai+1)-m)>>1;
bk = ((bi+1)*(bi+1)-n)>>1;
printf("%dn",abs(ai-bi)+abs(aj-bj)+abs(ak-bk));
}
}