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#1627484
#include <stdio.h>main(){int a,n;int f;read("%d",&n);a=0;f=1;for(i=0;i<=n;i++){ f = f + a; a=f-1;}printf("n=%d ; f=%d",n,f);}#include <stdio.h>main(){int a,n;int f;read("%d",&n);a=0;f=1;for(i=0;i<=n;i++){ f = f + a; a=f-1;}printf("n=%d ; f=%d",n,f);}