22 lines
330 B
C
22 lines
330 B
C
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#include <stdio.h>
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int main(void){
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int number,n[20];
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scanf("%d",&number);
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int i;
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for(i = 0; i < number; i++){
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scanf("%d",&n[i]);
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}
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int max = -1, now = 1;
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for(i = 0; i < number; i++){
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if(n[i] > 0){
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now *= n[i];
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if(now > max) max = now;
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}
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}
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if(max > 0)
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printf("%d\n",max);
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else printf("-1\n");
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return 0;
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}
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