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..无语 输出方案的时候 一种AC一种WA。。 这两种有区别吗？。。这是AC的
for (i=1;i<=n;i++)
{
if (!hash[i])
ans++;
if (hash[i+n])
ans++;
}
printf("%d\n",ans);
for (i=1;i<=n;i++)
{
if (!hash[i])
printf("%d -\n",i);
if (hash[i+n])
printf("%d +\n",i);
}
这是WA的
for (i=1;i<=n;i++)
if (!hash[i])
ans++;
for (i=n+1;i<=n*2;i++)
if (hash[i])
ans++;
printf("%d\n",ans);
for (i=1;i<=n;i++)
if (!hash[i])
printf("%d -\n",i);
for (i=n+1;i<=n*2;i++)
if (hash[i])
printf("%d +\n",i-n);
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