15 lines
180 B
C
15 lines
180 B
C
#include <stdio.h>
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int main() {
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int N;
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scanf("%d",&N);
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int res = 0;
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for(int i=5; i<=N; i=i*5){
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res += N/i;
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}
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printf("%d\n",res);
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return 0;
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} |