View Compilation Error

0_0_33484350_4423.cpp: In function 'int main()':
0_0_33484350_4423.cpp:169:42: error: 'g' was not declared in this scope
             for (int j = 0; j <= N; ++j) g[i][j] = 0;
                                          ^
0_0_33484350_4423.cpp:186:39: error: 'g' was not declared in this scope
                 if (be[v] != be[u] && g[u][v] == 0) {
                                       ^