#include #define DIM 200 const int Mod = 998244353; long long div_mod(long long x, long long y, long long z) { if (x % y == 0) return x / y; else return (div_mod((1 + x / y) * y - x, (z % y), y) * z + x) / y; } int rank_matrix(int d, int A[][DIM]) { if (d <= 0) return 1; static int i, j, k, r, p[DIM], X[DIM][DIM]; long long inv, tmp[DIM]; for (i = 0; i < d; i++) p[i] = i; for (i = 0; i < d; i++) for (j = 0; j < d; j++) X[i][j] = A[i][j]; for (i = 0, r = 0; i < d; i++) { for (j = r; j < d; j++) if (X[i][p[j]] != 0) break; if (j == d) continue; else if (j != r) { p[r] ^= p[j]; p[j] ^= p[r]; p[r] ^= p[j]; } inv = div_mod(1, X[i][p[r]], Mod); for (k = i; k < d; k++) tmp[k] = X[k][p[r]] * inv % Mod; for (j = r + 1; j < d; j++) { if (X[i][p[j]] != 0) { for (k = i + 1; k < d; k++) { X[k][p[j]] -= tmp[k] * X[i][p[j]] % Mod; if (X[k][p[j]] < 0) X[k][p[j]] += Mod; } X[i][p[j]] = 0; } } r++; } return r; } int inv_matrix(int d, int A[][DIM], int A_inv[][DIM]) { int dd = d * 2; static int i, j, k, p[DIM], X[DIM][DIM*2]; long long inv, tmp; for (i = 0; i < d; i++) p[i] = i; for (i = 0; i < d; i++) { for (j = 0; j < d; j++) { X[i][j] = A[i][j]; X[i][j+d] = (j == i)? 1: 0; } } for (i = 0; i < d; i++) { for (k = i; k < d; k++) if (X[p[k]][i] != 0) break; if (k == d) return -1; else if (k != i) { p[i] ^= p[k]; p[k] ^= p[i]; p[i] ^= p[k]; } inv = div_mod(1, X[p[i]][i], Mod); for (j = i; j < dd; j++) X[p[i]][j] = X[p[i]][j] * inv % Mod; for (k = 0; k < d; k++) { if (k == i) continue; if (X[p[k]][i] != 0) { tmp = X[p[k]][i]; X[p[k]][i] = 0; for (j = i + 1; j < dd; j++) { X[p[k]][j] -= tmp * X[p[i]][j] % Mod; if (X[p[k]][j] < 0) X[p[k]][j] += Mod; } } } } for (i = 0; i < d; i++) for (j = 0; j < d; j++) A_inv[i][j] = X[p[i]][j+d]; return 0; } // A = B void copy_matrix(int d1, int d2, int A[][DIM], int B[][DIM]) { int i, j; for (i = 0; i < d1; i++) for (j = 0; j < d2; j++) A[i][j] = B[i][j]; } // A += cB void add_matrix(int d, int A[][DIM], int c, int B[][DIM]) { int i, j; for (i = 0; i < d; i++) { for (j = 0; j < d; j++) { A[i][j] += (long long)B[i][j] * c % Mod; if (A[i][j] >= Mod) A[i][j] -= Mod; } } } // A = A * B void multiply_matrix_right(int d1, int d2, int d3, int A[][DIM], int B[][DIM]) { int i, j, k; static long long C[DIM][DIM]; for (i = 0; i < d1; i++) { for (j = 0; j < d3; j++) { for (k = 0, C[i][j] = 0; k < d2; k++) C[i][j] += (long long)A[i][k] * B[k][j] % Mod; } } for (i = 0; i < d1; i++) for (j = 0; j < d3; j++) A[i][j] = C[i][j] % Mod; } // A = B * A void multiply_matrix_left(int d1, int d2, int d3, int B[][DIM], int A[][DIM]) { int i, j, k; static long long C[DIM][DIM]; for (i = 0; i < d1; i++) { for (j = 0; j < d3; j++) { for (k = 0, C[i][j] = 0; k < d2; k++) C[i][j] += (long long)B[i][k] * A[k][j] % Mod; } } for (i = 0; i < d1; i++) for (j = 0; j < d3; j++) A[i][j] = C[i][j] % Mod; } int SMW_rank2_update_inv(int d, int A_inv[][DIM], int U[][DIM], int VT[][DIM]) { static int I[DIM][DIM] = {{1, 0}, {0, 1}}, B[DIM][DIM], B_inv[DIM][DIM]; int i, j; copy_matrix(d, d, B, A_inv); multiply_matrix_left(2, d, d, VT, B); multiply_matrix_right(2, d, 2, B, U); add_matrix(2, B, 1, I); if (inv_matrix(2, B, B_inv) != 0) return -1; multiply_matrix_left(d, d, 2, A_inv, U); multiply_matrix_right(2, d, d, VT, A_inv); multiply_matrix_left(d, 2, 2, U, B_inv); multiply_matrix_right(d, 2, d, B_inv, VT); add_matrix(d, A_inv, Mod - 1, B_inv); return 0; } void wedge_prod_vector(int d, int b[], int c[], int A[][DIM]) { int i, j; for (i = 0; i < d; i++) { for (j = 0; j < d; j++) { A[i][j] = ((long long)b[i] * c[j] - (long long)c[i] * b[j]) % Mod; if (A[i][j] >= Mod) A[i][j] -= Mod; else if (A[i][j] < 0) A[i][j] += Mod; } } } #define MT_N 624 #define MT_M 397 #define MT_MATRIX_A 0x9908b0dfUL #define MT_UPPER_MASK 0x80000000UL #define MT_LOWER_MASK 0x7fffffffUL static unsigned int mt[MT_N]; static int mti = MT_N + 1; void init_genrand(unsigned int s) { mt[0] = s & 0xffffffffUL; for (mti = 1; mti < MT_N; mti++) { mt[mti] = (1812433253UL * (mt[mti-1] ^ (mt[mti-1] >> 30)) + mti); mt[mti] &= 0xffffffffUL; } } unsigned int genrand() { unsigned int y; static unsigned int mag01[2] = {0x0UL, MT_MATRIX_A}; if (mti >= MT_N) { int kk; if (mti == MT_N + 1) init_genrand(5489UL); for (kk = 0; kk < MT_N - MT_M; kk++) { y = (mt[kk] & MT_UPPER_MASK) | (mt[kk+1] & MT_LOWER_MASK); mt[kk] = mt[kk+MT_M] ^ (y >> 1) ^ mag01[y&0x1UL]; } for (; kk < MT_N - 1; kk++) { y = (mt[kk] & MT_UPPER_MASK) | (mt[kk+1] & MT_LOWER_MASK); mt[kk] = mt[kk+(MT_M-MT_N)] ^ (y >> 1) ^ mag01[y&0x1UL]; } y = (mt[MT_N-1] & MT_UPPER_MASK) | (mt[0] & MT_LOWER_MASK); mt[MT_N-1] = mt[MT_M-1] ^ (y >> 1) ^ mag01[y&0x1UL]; mti = 0; } y = mt[mti++]; y ^= (y >> 11); y ^= (y << 7) & 0x9d2c5680UL; y ^= (y << 15) & 0xefc60000UL; y ^= (y >> 18); return y; } void solve(int N, int M, int u[], int v[], int w[]) { int i, j, k, ans[601], x[601], Y[DIM][DIM], Y_inv[DIM][DIM], Z[DIM][DIM], b[DIM], c[DIM], U[DIM][DIM], VT[DIM][DIM]; long long r; if (N % 2 != 0) N++; for (i = 0; i < N; i++) for (j = 0; j < N; j++) Y[i][j] = 0; for (i = 1; i <= M; i++) { r = genrand() % Mod; x[i] = r; Y[u[i]][v[i]] += r; if (Y[u[i]][v[i]] >= Mod) Y[u[i]][v[i]] -= Mod; Y[u[i]][w[i]] -= r; if (Y[u[i]][w[i]] < 0) Y[u[i]][w[i]] += Mod; Y[v[i]][u[i]] -= r; if (Y[v[i]][u[i]] < 0) Y[v[i]][u[i]] += Mod; Y[v[i]][w[i]] += r; if (Y[v[i]][w[i]] >= Mod) Y[v[i]][w[i]] -= Mod; Y[w[i]][u[i]] += r; if (Y[w[i]][u[i]] >= Mod) Y[w[i]][u[i]] -= Mod; Y[w[i]][v[i]] -= r; if (Y[w[i]][v[i]] < 0) Y[w[i]][v[i]] += Mod; } r = rank_matrix(N, Y); ans[M] = r / 2; for (k = 0; k * 2 + r < N; k++) { for (j = 0; j < N; j++) { b[j] = genrand() % Mod; c[j] = genrand() % Mod; } wedge_prod_vector(N, b, c, Z); add_matrix(N, Y, genrand() % Mod, Z); } inv_matrix(N, Y, Y_inv); for (i = M; i > 1; i--) { for (j = 0; j < N; j++) { U[j][0] = 0; U[j][1] = 0; VT[0][j] = 0; VT[1][j] = 0; } U[u[i]][0] = x[i]; U[v[i]][0] = Mod - x[i]; U[u[i]][1] = x[i]; U[w[i]][1] = Mod - x[i]; VT[0][u[i]] = Mod - 1; VT[0][w[i]] = 1; VT[1][u[i]] = 1; VT[1][v[i]] = Mod - 1; if (SMW_rank2_update_inv(N, Y_inv, U, VT) != 0) { ans[i-1] = ans[i] - 1; do { r = genrand() % Mod; for (j = 0; j < N; j++) { b[j] = genrand() % Mod; c[j] = genrand() % Mod; U[j][0] = b[j] * r % Mod; U[j][1] = c[j] * r % Mod; VT[0][j] = c[j]; VT[1][j] = Mod - b[j]; } if (SMW_rank2_update_inv(N, Y_inv, U, VT) != 0) continue; for (j = 0; j < N; j++) { U[j][0] = 0; U[j][1] = 0; VT[0][j] = 0; VT[1][j] = 0; } U[u[i]][0] = x[i]; U[v[i]][0] = Mod - x[i]; U[u[i]][1] = x[i]; U[w[i]][1] = Mod - x[i]; VT[0][u[i]] = Mod - 1; VT[0][w[i]] = 1; VT[1][u[i]] = 1; VT[1][v[i]] = Mod - 1; if (SMW_rank2_update_inv(N, Y_inv, U, VT) == 0) break; for (j = 0; j < N; j++) { U[j][0] = b[j] * r % Mod; U[j][1] = c[j] * r % Mod; VT[0][j] = Mod - c[j]; VT[1][j] = b[j]; } SMW_rank2_update_inv(N, Y_inv, U, VT); } while (1); wedge_prod_vector(N, b, c, Z); add_matrix(N, Y, r, Z); } else ans[i-1] = ans[i]; r = x[i]; Y[u[i]][v[i]] -= r; if (Y[u[i]][v[i]] < 0) Y[u[i]][v[i]] += Mod; Y[u[i]][w[i]] += r; if (Y[u[i]][w[i]] >= Mod) Y[u[i]][w[i]] -= Mod; Y[v[i]][u[i]] += r; if (Y[v[i]][u[i]] >= Mod) Y[v[i]][u[i]] -= Mod; Y[v[i]][w[i]] -= r; if (Y[v[i]][w[i]] < 0) Y[v[i]][w[i]] += Mod; Y[w[i]][u[i]] -= r; if (Y[w[i]][u[i]] < 0) Y[w[i]][u[i]] += Mod; Y[w[i]][v[i]] += r; if (Y[w[i]][v[i]] >= Mod) Y[w[i]][v[i]] -= Mod; } for (i = 1; i <= M; i++) printf("%d\n", ans[i]); } int main() { int i, N, M, u[601], v[601], w[601]; scanf("%d %d", &N, &M); for (i = 1; i <= M; i++) scanf("%d %d %d", &(u[i]), &(v[i]), &(w[i])); solve(N, M, u, v, w); fflush(stdout); return 0; }