1부터 100까지 더하는 합리(!)적인 알고리즘

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
 
 
#define SUM_MAX 100
 
 
int main(int argc, char *argv[]) {
        int n, i, sum, checksum;
        int check[SUM_MAX];
 
 
        n=i=sum=checksum=0;
 
 
        for(i=0; i<SUM_MAX; i++) {
                check[i] = i+1;
        }
 
        sleep(1);
        srand(time(NULL)) ;
 
 
        while(1) {
                n = rand()%SUM_MAX + 1;
 
 
                if((n > 0) && (n < SUM_MAX+1)) {
                        if(check[n-1]>0)
                                sum += n;
                        check[n-1] = 0;
 
 
                        checksum = 0;
                        for(i=0; i<SUM_MAX; i++) {
                                checksum += check[i];
                        }
                        if(checksum==0)
                                break;
                }
        }
 
 
        printf("result : %d\n",sum);
 
 
        return 0;
}