Number Steps

( http://www.spoj.pl/problems/NSTEPS/ )

//#include <cstdio> // decomment to compile as C++
// g++ number_steps.c -time -o number_steps_cpp
#include <stdio.h>
// gcc number_steps.c -time -o number_steps_c
// gcc number_steps.c -std=c99 -time -o number_steps_c99

int main() {
    int t,a,b;
    scanf("%d ",&t);
    while(t--) {
        scanf("%d %d", &a, &b);
        if(a!=b && a-b!=2) {printf("No Number\n");continue;}
        if(a%2==0 && b%2==0) printf("%d\n", a+b);
        else printf("%d\n", a+b-1);
    }
    return 0;
}