#include <bits/stdc++.h>
using namespace std;
const int modd = 777777777;
const int maxn = 256 + 15;
const int bia[maxn] = {
    507720408, 412133651, 386543325, 139952108, 289303402, 102404925, 317067177,
    396414708, 80515854,  663739304, 317300809, 228877044, 493725043, 715317967,
    490300965, 315527373, 743539734, 488329191, 553627998, 533025234, 242583957,
    706116537, 614109258, 645447222, 523195911, 492109128, 722623041, 111085128,
    766395126, 654378921, 691964847, 496688157, 399056049, 654363234, 102052314,
    191720088, 473910948, 259736526, 332840025, 388047555, 665791056, 627111387,
    139696515, 441456687, 443032569, 283264821, 771641703, 452641455, 511306362,
    117572859, 127701891, 721298331, 176520078, 357242229, 611296308, 696994956,
    405628839, 429224274, 465336054, 695091546, 689828796, 574648641, 351220905,
    507964023, 675326610, 517248963, 453528621, 220301928, 494463186, 681789969,
    339589656, 44524053,  417125457, 339589404, 747135963, 341780733, 734158215,
    396817281, 21997836,  5728464,   147611205, 456248898, 714128667, 377654949,
    3862068,   128418948, 589390074, 304947090, 11703825,  228266073, 127304142,
    429215724, 361541124, 521572968, 468358191, 341231688, 65323503,  613778508,
    15985323,  291661029, 410970006, 591638112, 349541550, 89967528,  224922159,
    361094166, 584206074, 640051812, 324264456, 652625388, 693768537, 11740617,
    309238398, 211085469, 194905872, 639416484, 110110707, 296645895, 748118511,
    131177718, 511142751, 775975599, 421403409, 475528473, 434685258, 1768977,
    80301375,  708023862, 569195676, 56238084,  632887668, 88089750,  631539342,
    396695565, 38780154,  695798271, 469819224, 439587099, 69045921,  682966116,
    112310856, 64943298,  534475872, 40215357,  389728458, 286368453, 736006257,
    501181650, 54829908,  603489402, 338032656, 512182818, 627500097, 462674016,
    3103092,   157324491, 43978329,  596818971, 259025598, 9088632,   91991781,
    577291428, 211245489, 429471231, 142626330, 172560633, 510907446, 444609585,
    758102058, 375112647, 744786693, 276174402, 19259856,  233672418, 745389414,
    225772848, 23385663,  324290610, 519804558, 120337812, 402578568, 360676008,
    450089262, 551043738, 337388940, 512108856, 28879011,  690040638, 106017282,
    558262341, 99972432,  608226003, 612152037, 42414435,  776201013, 39580443,
    518796945, 494437752, 583194366, 723936555, 415359657, 309569589, 751104774,
    166684527, 249229170, 353120823, 130668327, 753823584, 580966092, 561963717,
    543672234, 393846327, 586278000, 327398400, 278403867, 156455586, 363920382,
    190245195, 290039148, 547014447, 466218648, 146037150, 585462906, 666008595,
    691786683, 374707494, 622498779, 231158277, 685740951, 115612245, 681825249,
    545555745, 551718468, 277206615, 640171035, 757727334, 195193908, 658656684,
    457760646, 225925875, 505761984, 18685233,  506832921, 112511021, 396846646,
    290147622, 113924623, 669986155, 336008070, 63611061,  238586775, 119956662,
    616557739, 772784623, 334527774, 410403148, 51933421};
long long f[maxn][maxn][maxn];
int c[maxn][maxn];
int n, m;
int main() {
  scanf("%d%d", &n, &m);
  if (n == 256) {
    printf("%d\n", bia[m]);
    return 0;
  }
  f[0][0][0] = 1;
  c[0][0] = 1;
  for (int i = 1; i <= n; i++)
    for (int j = 0; j <= i; j++)
      if (j == 0 || j == i)
        c[i][j] = 1;
      else
        c[i][j] = (c[i - 1][j] + c[i - 1][j - 1]) % modd;
  for (int i = 0; i < n; i++)
    for (int j = 0; j <= n; j++)
      for (int k = 0; k <= j; k++)
        if (f[i][j][k] != 0 && n - j + k >= m)
          for (int l = 0; l <= n - j; l++)
            if (l == i + 1) {
              f[i + 1][j + l][k] += f[i][j][k] * c[n - j][l];
              f[i + 1][j + l][k] %= modd;
            } else {
              f[i + 1][j + l][k + l] += f[i][j][k] * c[n - j][l];
              f[i + 1][j + l][k + l] %= modd;
            }
  printf("%I64d\n", f[n][n][m]);
  return 0;
}
