Ecstatic Super Mario (SPOJ) -Programming Problem

mario.cpp

//PROBLEM STATEMENT: http://www.spoj.com/problems/ECSTATIC/
//ACCEPTED
#include<iostream>
#include<cmath>

int main(){
    int testCase;
    std::cin>>testCase;
    for(int i=0;i<testCase;i++){
          int times;
    int n1,n2;
    int length=0;
    std::cin>>times;
    for(int j=0;j<times;j++){
        std::cin>>n1>>n2;
        int sub=std::abs(n2-n1);
        if(sub>length){
            length=sub;
        }
    }
    std::cout<<"Case "<<i+1<<": "<<length<<std::endl;
    }

}