while(s--)
{
if(len2%2==1&&n%2==0||len2%2==0&&n%2==1) //倒三角形情况
{
n=n-2*(len2-1);
pace=1;
bol=1;
if(s==0) break;
len2--;
}
if(len2%2==1&&n%2==1||len2%2==0&&n%2==0) //正三角形情况
{
if(bol==0)
pace=0;
xia=m+(len1+len2-1)*(len2-len1);
if(n<=xia)
{
n=n+1-2*(len2-1);
pace+=2;
bol=1; //注意将bol改变
len2--;
if(len1==len2) break;
}
else if(n>xia)
{
n=n-1-2*(len2-1);
pace+=2;
len2--;
if(len1==len2) break;
}
}
}
if(m>=n) pace+=(m-n);
else pace+=(n-m);
printf("%ld/n",pace);
}
}
return 0;
}