View Compilation Error

0_0_21656951_22810.cpp: In function 'void push_up(int)':
0_0_21656951_22810.cpp:22:26: error: 'rs' was not declared in this scope
             f[o][i][j]=f[rs][i][f[ls]   ]
                          ^
0_0_21656951_22810.cpp:22:35: error: 'ls' was not declared in this scope
             f[o][i][j]=f[rs][i][f[ls]   ]
                                   ^
0_0_21656951_22810.cpp: In function 'void solve()':
0_0_21656951_22810.cpp:37:19: error: 'n' was not declared in this scope
     scanf("%d%d",&n,&m);
                   ^
0_0_21656951_22810.cpp:37:22: error: 'm' was not declared in this scope
     scanf("%d%d",&n,&m);
                      ^