HDU 1194 Beat the Spread!

Beat the Spread!

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 2738    Accepted Submission(s): 1439

Problem Description

Superbowl Sunday is nearly here. In order to pass the time waiting for the half-time commercials and wardrobe malfunctions, the local hackers have organized a betting pool on the game. Members place their bets on the sum of the two final scores, or on the absolute difference between the two scores.

Given the winning numbers for each type of bet, can you deduce the final scores?

 

Input

The first line of input contains n, the number of test cases. n lines follow, each representing a test case. Each test case gives s and d, non-negative integers representing the sum and (absolute) difference between the two final scores.

 

Output

For each test case, output a line giving the two final scores, largest first. If there are no such scores, output a line containing "impossible". Recall that football scores are always non-negative integers.

 

Sample Input

240 2020 40

 

Sample Output

30 10impossible

 

Source

University of Waterloo Local Contest 2005.02.05

 

Recommend

Ignatius.L

 

分析：题意就是给你2个人得总分和2个人的分差，计算出2个人的成绩，简单的数学题

代码：

#include<stdio.h>int main(){    int N;    scanf("%d",&N);    while(N--)    {        int sum,dif;        scanf("%d%d",&sum,&dif);        if((sum-dif)<0)            printf("impossible\n");        else if((sum-dif)%2!=0)            printf("impossible\n");        else            printf("%d %d\n",(sum+dif)/2,(sum-dif)/2);    }    return 0;}