8.621 - Secret Research

2019独角兽企业重金招聘Python工程师标准>>>

这道题只有打印 ‘+’ 时是仅仅有1、4、78三种情况的。
‘-’:最后两个数字为‘3’,‘5’的都满足; 比如,14781903519035
'*':第一个为数字'9',最后一个为数字'4'的都满足; 比如,9359419014784
'?':前三个数字为'1','9','0'的都满足. 比如19014783594
前期以为只有12种情况,直接枚举打印得了一个WA。

int main()
{
int n;
for(scanf("%d",&n); n--;)
{
char str[256];
scanf("%s",str);
if(strcmp(str,"1")==0||strcmp(str,"4")==0||strcmp(str,"78")==0) putchar('+');
else
{
int len=strlen(str)-1;
if(str[len-1]=='3'&&str[len]=='5') putchar('-');
else if(str[0]=='9'&&str[len]=='4') putchar('*');
else putchar('?');
}
putchar('\n');
}
return 0;
}

转载于:https://my.oschina.net/pandacub/blog/139193

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