UVA - 10935 Throwing cards away I (数组)

[code]#include<cstdio>
#include<cstring>

int num[10000];

int main() {
    int n;
    while(scanf("%d", &n) == 1 && n) {
        memset(num,0,sizeof(num));
        if(n == 1) {
            printf("Discarded cards:\n");
            printf("Remaining card: 1\n");
            continue;
        }
        for(int i = 1; i <= n; i++)
            num[i] = i;
        int last = n + 1, pos = 1;
        printf("Discarded cards: ");
        for(int i = 0; i < n - 2; i++) {
            printf("%d, ", num[pos]);
            num[last++] = num[pos+1];
            pos += 2;
        }
        printf("%d\n",num[pos]);
        num[last++] = num[pos+1];
        pos += 2;
        printf("Remaining card: %d\n",num[pos]);
    }
    return 0;
}