1n_res = 5; 2n_events = 22; 3n_prec = 66; 4source = 1; 5sink = 22; 6min_lvl = [-1, -2, -8, 0, -8]; 7max_lvl = [4, 3, -1, 4, -2]; 8rr = [| 0, -1, 1, 0, 0, 0, 0, -1, -2, 2, 0, 2, -2, 1, 0, -2, 1, 2, 1, 0, 0, 0 9 | 0, -1, 0, 0, 0, 2, -2, -1, 1, 0, 1, -2, -2, -2, 1, 0, 2, 2, 2, 0, 1, 0 10 | 0, -1, 0, 1, 0, -1, -2, -1, 1, -2, 0, 0, 0, 2, 0, -1, -1, -1, 1, 1, -2, 0 11 | 0, 0, 2, 2, 0, -1, 0, 1, 2, 0, 0, 1, 0, -1, 0, 0, -1, 0, 0, -2, 0, 0 12 | 0, -1, 0, 0, 0, -1, 2, -2, -1, 0, 0, 0, 0, -1, 0, -1, -1, -2, 0, 0, 0, 0 |]; 13prec = [| 1, 0, 2 14 | 1, 0, 4 15 | 1, 0, 3 16 | 2, 0, 6 17 | 2, 3, 17 18 | 2, 13, 11 19 | 3, 0, 9 20 | 3, 3, 5 21 | 4, 7, 7 22 | 4, 10, 9 23 | 4, 0, 21 24 | 5, 3, 11 25 | 5, 8, 19 26 | 5, -2, 21 27 | 6, -6, 18 28 | 6, 3, 16 29 | 7, -23, 12 30 | 7, -36, 16 31 | 7, -40, 4 32 | 7, 1, 19 33 | 7, -2, 18 34 | 8, -5, 9 35 | 8, -3, 20 36 | 9, 0, 19 37 | 9, -2, 8 38 | 10, 1, 12 39 | 11, -22, 2 40 | 11, 5, 10 41 | 11, -13, 5 42 | 11, -12, 3 43 | 12, 0, 8 44 | 12, 0, 6 45 | 13, 21, 12 46 | 13, 5, 14 47 | 14, 0, 21 48 | 14, 3, 15 49 | 14, 0, 18 50 | 14, 7, 8 51 | 14, -1, 16 52 | 14, 9, 19 53 | 14, -28, 17 54 | 15, 0, 9 55 | 15, -1, 7 56 | 15, -25, 14 57 | 15, 0, 21 58 | 15, -27, 13 59 | 15, -24, 17 60 | 16, -22, 6 61 | 16, 4, 7 62 | 16, 16, 21 63 | 16, -30, 10 64 | 17, 12, 13 65 | 17, -3, 10 66 | 18, -29, 10 67 | 18, 5, 20 68 | 18, -38, 4 69 | 18, 10, 19 70 | 18, 23, 8 71 | 19, 9, 22 72 | 20, -9, 9 73 | 20, -6, 8 74 | 20, 6, 22 75 | 21, -39, 10 76 | 21, -31, 16 77 | 21, -20, 4 78 | 21, 1, 22 |]; 79