Created
December 22, 2012 18:48
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SPOJ, Simple
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| #include <stdio.h> | |
| int a[3]={1,1,1}; | |
| int p[3]={1,1,1}; | |
| int main() | |
| { | |
| int n; | |
| scanf("%d", &n); | |
| while(--n) | |
| { | |
| a[0]=p[0]+p[1]; | |
| a[1]=p[0]+p[1]+p[2]; | |
| a[2]=p[1]+p[2]; | |
| p[0]=a[0]; | |
| p[1]=a[1]; | |
| p[2]=a[2]; | |
| } | |
| printf("%d\n", a[0]+a[1]+a[2]); | |
| return 0; | |
| } |
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