CodeForces 15C【Nim游戏】【博弈论】

#include 
#define int long long

using namespace std;

int solve(int x) {
    if (x % 4 == 0)
        return x;
    if (x % 4 == 1)
        return 1;
    if (x % 4 == 2)
        return x + 1;
    return 0;
}

signed main() {
    int T, ans = 0;
    cin >> T;
    while (T --) {
        int a, b;
        cin >> a >> b;
        ans ^= solve(a - 1) ^ solve(a + b - 1);
    }
    if (ans)
        cout << "tolikn";
    else
        cout << "bolikn";
    return 0;
}