题解 | #2的n次方计算#

#include <stdio.h>

int main() {
    int a;
    int b=2;
    int sum=1;
    while (scanf("%d", &a) != EOF) {
        for(int i=0;i<a;i++){
            sum*=b;
        }
    }
    printf("%d",sum);
    return 0;
}