View Compilation Error

0_0_33551871_1990.cpp: In function 'void dfs(int, int)':
0_0_33551871_1990.cpp:18:20: error: 'k' was not declared in this scope
     for(int j=0;j<=k;j++)h[j]=mid+1;
                    ^
0_0_33551871_1990.cpp:21:20: error: 'k' was not declared in this scope
     for(int j=0;j<=k;j++)for(int k=0;j+k<=m;k++){
                    ^
0_0_33551871_1990.cpp:26:20: error: 'k' was not declared in this scope
     for(int j=0;j<=k;j++)f[x][j]=h[j];
                    ^