题解 | #完全数计算#

#import <Foundation/Foundation.h>

int main(int argc, char* argv[]) {
    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];

    int num;
    scanf("%d", &num);
    int totalNum = 0;

    for (int j = 1; j < num; j++) {
        NSMutableArray* array = [NSMutableArray array];
        for (int i = 1; i < j; i++) {
            if (j % i == 0) {
                [array addObject:@(i)];
            }
        }
        int sum = 0;
        for (int i = 0; i < array.count; i++) {
            sum += [[array objectAtIndex:i] intValue];
        }
        if (sum == j) {
            totalNum ++;
        }
    }
    printf("%d", totalNum);

    return 0;
}