20 lines
326 B
C
20 lines
326 B
C
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#include <stdio.h>
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#define TH(x) ((x)*(x))
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int main(void){
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int number,i;
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double avg,temp[33000];
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scanf("%d",&number);
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for(i = 0 ;i < number; i++){
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scanf("%lf",&temp[i]);
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avg += temp[i];
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}
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avg /= number;
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double s = 0.0;
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for(i = 0; i < number; i++){
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s += TH(temp[i] - avg);
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}
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printf("%.6lf\n",s);
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return 0;
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}
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