3

#include <iostream>
using namespace std;

int main() {
    
    int sum1 , sum2 ; 
    for (size_t i = 1000; i <= 9999; i++){
        sum1 = (i / 1000) + ((i % 100) / 10);
        sum2 = (((i / 100) % 10 ) + (i % 10));
        if (sum1 == sum2){
            cout << "sum(1+3) = " <<  sum1 << endl ;
            cout << "sum(2+4) = " << sum2 << endl ; 
            cout << "In mumber = " << i << endl ; 
            cout << "======================" << endl ; 
        }
        sum1 = 0 ; 
        sum2 = 0 ; 
        
    }    
    
    
    
    
    return 0;
}