View Compilation Error

0_0_32614617_19561.cpp: In function 'void solve()':
0_0_32614617_19561.cpp:14:8: error: 'k' was not declared in this scope
    for(k=w[i][j-1];k<=w[i+1][j];++k)
        ^
0_0_32614617_19561.cpp:18:6: error: 's' was not declared in this scope
      s[i][j]=k;
      ^