#include<bits/stdc++.h>
using namespace std;intmain(){longlong a, b, c, sum;int n;
cin>>n;for(int i =0; i < n; i++){
cin>>a>>b>>c;
sum = a+b;if(a>0&& b>0&& sum<=0){//两个很大的正数相加溢出为负
cout<<"Case #"<<i+1<<": true"<<endl;}elseif(a<0&& b<0&& sum>=0){//两个很小的数溢出为正
cout<<"Case #"<<i+1<<": false"<<endl;}elseif(sum > c){
cout<<"Case #"<<i+1<<": true"<<endl;}else{
cout<<"Case #"<<i+1<<": false"<<endl;}}return0;}
java版
import java.math.BigInteger;import java.util.Scanner;publicclassMain{publicstaticvoidmain(String[] args){
Scanner scan =newScanner(System.in);
BigInteger a, b, c;int n = scan.nextInt();for(int i =0; i < n; i++){
a = scan.nextBigInteger();
b = scan.nextBigInteger();
c = scan.nextBigInteger();if(a.add(b).compareTo(c)==1){
System.out.println("Case #"+(i+1)+": true");}else{
System.out.println("Case #"+(i+1)+": false");}}}}