PAT A 甲级 1065 A+B and C (64bit) (20分)

1065 A+B and C (64bit) (20分)

思路

这道题的难点并不只是相加可能导致数据数据溢出。更重要的是，提供的输入范围里，2⁶³根本就不在long long的范围内。long long的范围是到2⁶³-1。
也就是说，从保存输入这一步开始，就已经只能用string类型了。

但是和C++不同，python3的int是无上限的（微笑）。

当然啦，C++也是可以做这道题的，只不过大概得用string写个循环来计算就是了。

代码

times=int(input())
lst=[]
for i in range(times):
    lst.append(list(map(int,input().split())))
    print('Case #%d: '%(i+1),end='')
    if lst[i][0]+lst[i][1]>lst[i][2]:
        print('true')
    else: 
        print('false')

题目

Given three integers A, B and C in [−2^​63,2⁶³], you are supposed to tell whether A+B>C.

Input Specification:
The first line of the input gives the positive number of test cases, T (≤10). Then T test cases follow, each consists of a single line containing three integers A, B and C, separated by single spaces.

Output Specification:
For each test case, output in one line Case #X: true if A+B>C, or Case #X: false otherwise, where X is the case number (starting from 1).

Sample Input:
3
1 2 3
2 3 4
9223372036854775807 -9223372036854775808 0

Sample Output:
Case #1: false
Case #2: true
Case #3: false