View Compilation Error

0_0_25952221_4654.cpp:15:9: error: 'N' was not declared in this scope
 int GCD[N][N];
         ^
0_0_25952221_4654.cpp:15:12: error: 'N' was not declared in this scope
 int GCD[N][N];
            ^
0_0_25952221_4654.cpp: In function 'void solve()':
0_0_25952221_4654.cpp:47:9: error: 'GCD' was not declared in this scope
   int y=GCD[x][t2];
         ^
0_0_25952221_4654.cpp:61:18: error: 'GCD' was not declared in this scope
     int nx=t, ny=GCD[x][t], nz=GCD[y][t], now=GCD[z,t];
                  ^
0_0_25952221_4654.cpp:62:20: error: 'nz' was not declared in this scope
     (g[num[nx][ny][nz]]+=1ll*f[j]*v[now]%P)%=P;
                    ^
0_0_25952221_4654.cpp:62:37: error: 'now' was not declared in this scope
     (g[num[nx][ny][nz]]+=1ll*f[j]*v[now]%P)%=P;
                                     ^
0_0_25952221_4654.cpp: In function 'int main()':
0_0_25952221_4654.cpp:77:26: error: 'GCD' was not declared in this scope
  ft(i,0,100) ft(j,0,100) GCD[i][j]=gcd(i,j);
                          ^