the Knight's tour problems

[Gandhi9381]

Your isSafe lambda had an unclosed bracket and an extra n parameter that wasn’t needed, since n is already accessible from the outer scope.

Before:

function<bool(int, int, int)> isSafe = [&](int x, int y, int n) {
return (x >= 0 && y >= 0 && x < n && y < n && board[x][y] == -1);
fix the code
};

After:

auto isSafe = [&](int x, int y) -> bool {
return (x >= 0 && y >= 0 && x < n && y < n && board[x][y] == -1);
};