44 lines
958 B
C++
44 lines
958 B
C++
#include<cstdio>
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#include<cstring>
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#include<iostream>
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#include<cmath>
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using namespace std;
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const int maxn=1e5+100;
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int n,a[maxn];
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int main()
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{
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int T,cas=1;
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scanf("%d",&T);
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while(T--)
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{
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scanf("%d",&n);
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for(int i=1;i<=n;i++)
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scanf("%d",&a[i]);
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bool is=true;
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for(int i=2;i<=n;i++)
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if(abs(a[i]-a[i-1])>3||(a[i]==a[i-1]&&a[i]!=1))
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{
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is=false;
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break;
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}
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if(!is)
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{
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printf("Case #%d: 0\n",cas++);
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continue;
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}
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int cnt=0;
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for(int i=2;i<=n;i++)
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{
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if(a[i]==2&&a[i-1]==1)
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cnt++;
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if(a[i]==1&&a[i-1]==2)
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cnt++;
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}
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if(a[n])
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printf("Case #%d: %d\n",cas++,cnt*2+2);
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else
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printf("Case #%d: %d\n",cas++,cnt+1);
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}
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return 0;
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}
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