50157. Pokemon's

#include <stdio.h>

int main(){
    int k;
    if(scanf("%d", &k) == EOF){
        printf("0\n");
        return 0;
    }
    int max_num = -1, sec_num = -1;
    int cnt[3] = {0};
    int ans = 0;

    int num;
    while(scanf("%d", &num) != EOF){
        if(num >= max_num) sec_num = max_num, max_num = num;
        else if(num >= sec_num) sec_num = num;

        cnt[num % 3] += 1;
        if(cnt[0] >= k && cnt[1] >= k && cnt[2] >= k){
            ans += sec_num;
            cnt[0] = 0, cnt[1] = 0, cnt[2] = 0;
            max_num = -1, sec_num = -1;
        }
    }
    if(sec_num != -1) ans += sec_num;
    else if(max_num != -1) ans += max_num;
    printf("%d\n", ans);
}