题解 | #密码验证合格程序#

#include <stdio.h>

int main() {
    char a[100];
    while (scanf("%s", a) != EOF) {
        int num, i, j, x=0, y=0, z=0, w=0, cnt = 0, flag = 0;
        //printf("%s\n", a);
        //printf("%d\n", strlen(a));
        if(strlen(a) < 9)
        {
            printf("NG\n");
            continue;
        }
        num = strlen(a);
        for(i = 0; i< num; i++)
        {
            if(a[i] <='z' && a[i] >= 'a')
            {
                if(0 == x)
                {
                    cnt++;
                }
                x++;
            }
            else if(a[i] <='Z' && a[i] >= 'A')
            {
                if(0 == y)
                {
                    cnt++;
                }
                y++;
            }
            else if(a[i] <='9' && a[i] >= '0')
            {
                if(0 == z)
                {
                    cnt++;
                }
                z++;
            }
            else if(a[i] == ' ' || a[i] == '\n')
            {
                printf("NG\n");
                continue;
            }
            else
            {
                if(0 == w)
                {
                    cnt++;
                }
                w++;
            }
        }
        //printf("%d,%d,%d,%d\n",x,y,z,w);
        if(cnt < 3)
        {
            printf("NG\n");
            continue;
        }
        for(i = 0; i < num - 3; i++)
        {
            for(j = i + 2; j < num - 2; j++)
            {
                if(a[i] == a[j] && a[i + 1] == a[j + 1] && a[i + 2] == a[j + 2])
                {
                    //printf("a[%d]=%d，a[%d]=%d\n", i, a[i], j, a[j]);
                    printf("NG\n");
                    flag = 1;
                    break;
                }
            }
            if(flag)
            {
                break;
            }
        }
        if(flag == 0)
            printf("OK\n");
    }
    return 0;
}