//  http://p...content-available-to-author-only...h.net/test/read.cgi/tech/1399810335/717
//  717 名前：デフォルトの名無しさん [sage]： 2014/06/09(月) 15:57:35.27 ID:KVOF4ter
//  ある病院で4と13（例えば104とか113とか）を使わないで全ての病室に番号を振りたいと考えている
//  この場合1000室目は何番になるか答えなさい(´・ω・｀)
#include<stdio.h>
#include<string.h>
int main()
{
    int i;                      // x号室
    int n;                      // x室目
    char b[16];
    n = 0;
    for (i = 1;; i++) {
        sprintf(b, "%d", i);
        if (strstr(b, "4") || strstr(b, "13")) {
            continue;
        }
        n++;
        if (n >= 1000) {
            printf("%d室目 --> %d号室\n", n, i);
            break;
        }
    }
    return 0;
}
 

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