14 lines
221 B
C
14 lines
221 B
C
#include <stdio.h>
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int main(void){
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int count, i;
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unsigned long long n[50] = {1,2};
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for(i = 2; i < 50; i++){
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n[i] = n[i-2] + n[i-1];
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}
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while(scanf("%d",&count) == 1){
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printf("%lld\n",n[count-1]);
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}
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return 0;
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}
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