1929B - Sasha and the Drawing - CodeForces Solution

/**
 * BISMILLAHIR RAHMANIR RAHIM ("in the name of God, Most Gracious, Most Merciful")
 * time start:    2024-02-15 21:12:54
 * time end  :    2024-02-15 21:55:14
*/

#include <bits/stdc++.h>
using namespace std;

#define ll long long int

void somadan() {
    ll n = 1,k;
    cin >> n>>k;
    ll temp = 2*n -2;
    ll ans =0;

    if(2*temp >= k) {
        if(k%2) {
            cout << k/2 +1 << endl;
        }
        else {
            cout << k/2 << endl;
        }
    }
    else {
        cout << k - temp  << endl;
    }

    
}

int main(void) { 
    ll t = 1; 
    cin >> t; 
    while(t--) somadan();
}