Comments

Someone can tell me what's wrong with my Div2 solution.C (1068C)? First I build a diagonal of rooks (1, 1), (2, 2), ... (n, n). Then for each connection a-b I put one rook of color min (a,b) on the cell (min(a, b), max(a, b)). My decision (https://mirror.codeforces.com/contest/1068/submission/44806161) got WA4