joj2471

2471: String triangle

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Result	TIME Limit	MEMORY Limit	Run Times	AC Times	JUDGE
	3s	65536K	3073	611	Standard

You are asked to draw a right-angle triangle, the given materials is a special word. Just see the sample for detail.

Input

The first line of each test case is a positive integer n. n is zero means the end of input that you should not care. The next line is a word (no blank) whose length is no more than 80.

Output

Print a right-angle triangle whose height and width are n using given word. You should print each character in the word in turn, if the last character is used, the next is the first character. Print a blank line between each case.

Sample Input

6
WORLD
3
ABCD
0

Sample Output

W
OR
LDW
ORLD
WORLD
WORLDW

A
BC
DAB

Problem Source: skywind

 

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This problem is used for contest: 101 157 168 179

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#include<stdio.h>

int main(void)
{
    int n;
    char a[100];
    bool first = false;
    while(scanf("%d",&n), n)
    {
        if (first)          //注意题目的格式
            printf("\n");      
        first = true;
        
        scanf("%s", a);
        
        char * p = a;
        
        for(int i=1; i<=n; i++)
        {
            for(int j=1; j<=i; j++)
            {
                if (*p == '\0')
                    p = a;
                printf("%c", *p);
                p++;
            }
            printf("\n");
        }
    }
    return 0;
}