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
+ - ? *
题目严重有歧义!!!
对S=S35类似的只考虑最后两位是否相等,而不考虑35之前的S是什么。
并记住按顺序进行判断。
代码如下:
#include <stdio.h> #include <string.h> int main(void) { int n,len; char str[1000]; scanf("%d",&n); while(n--) { scanf("%s",str); len=strlen(str); if(!strcmp(str,"1")||!strcmp(str,"4")||!strcmp(str,"78")) printf("+\n"); else if(str[len-2]=='3'&&str[len-1]=='5') printf("-\n"); else if(str[0]=='9'&&str[len-1]=='4') printf("*\n"); else if(str[0]=='1'&&str[1]=='9'&&str[2]=='0') printf("?\n"); } return 0; }