Stone Game II (noch nicht übersetzt)
A game is played with two piles of stones and two players.
On each player's turn, the player may remove a number of stones from the larger pile.
The number of stones removed must be a positive multiple of the number of stones in the smaller pile.
E.g. Let the ordered pair (6,14) describe a configuration with 6 stones in the smaller pile and 14 stones in the larger pile, then the first player can remove 6 or 12 stones from the larger pile.
The player taking all the stones from a pile wins the game.
A winning configuration is one where the first player can force a win. For example, (1,5), (2,6), and (3,12) are winning configurations because the first player can immediately remove all stones in the second pile.
A losing configuration is one where the second player can force a win, no matter what the first player does. For example, (2,3) and (3,4) are losing configurations: any legal move leaves a winning configuration for the second player.
Define S(N) as the sum of (xi+yi) for all losing configurations (xi,yi),0<xi<yi≤N.
We can verify that S(10)=211 and S(104)=230312207313.
Find S(1016)mod710.