codeforces/1607B.cpp at main · Nithin0306/codeforces · GitHub

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

#define fast_io ios::sync_with_stdio(false); cin.tie(nullptr);

int main() {
    fast_io;

    int t;
    cin >> t;
    while (t--) {
        // solve here
        long long start, jumps;
		cin >> start >> jumps;

		long long final_pos;
        if (jumps % 4 == 1)
            final_pos = -jumps;
        else if (jumps % 4 == 2)
            final_pos = 1;
        else if (jumps % 4 == 3)
            final_pos = jumps + 1;
        else
            final_pos = 0;

        if (start % 2 == 0)
            final_pos = start + final_pos;
        else
            final_pos = start - final_pos;

        cout << final_pos << endl;
    }

    return 0;
}