UVA621 - Secret Research

没啥说的，题目没看懂，但是数据很一般，很好AC。

题目：

Secret Research

 

  Secret Research 

At a certain laboratory results of secret research are thoroughly encrypted. A result of a single experiment is stored as an information of its completion:

 

`positive result', `negative result', `experiment failed' or `experiment not completed'

 

The encrypted result constitutes a string of digits S, which may take one of the following forms:

 

positive result 		 S = 1 or S = 4 or S = 78 

negative result 		 S = S35 

experiment failed 		 S = 9S4 

experiment not completed 		 S = 190S

(A sample result S35 means that if we add digits 35 from the right hand side to a digit sequence then we shall get the digit sequence corresponding to a failed experiment)

 

You are to write a program which decrypts given sequences of digits.

 

Input 

A integer n stating the number of encrypted results and then consecutive n lines, each containing a sequence of digits given as ASCII strings.

 

Output 

For each analysed sequence of digits the following lines should be sent to output (in separate lines):

 

		 + 		  for a positive result
		 - 		  for a negative result
		 * 		  for a failed experiment
		 ? 		  for a not completed experiment

In case the analysed string does not determine the experiment result, a first match from the above list should be outputted.

 

Sample Input 

 

4
78
7835
19078
944

 

Sample Output 

+
-
?
*

 

 

---

Miguel A. Revilla
2000-01-10

解答：

#include<stdio.h>
#include<string.h>
char str[100000];
int main()
{
    int t;
    scanf("%d",&t);
    getchar();
    int i;
    for(i=0;i<t;i++)
    {
        gets(str);
        if(strcmp(str,"1")==0||strcmp(str,"4")==0||strcmp(str,"78")==0)
            puts("+");
        else if(str[strlen(str)-2]=='3'&&str[strlen(str)-1]=='5')
            puts("-");
        else if(str[0]=='9'&&str[strlen(str)-1]=='4')
            puts("*");
        else if(str[0]=='1'&&str[1]=='9'&&str[2]=='0')
            puts("?");
    }
    return 0;
}