View Compilation Error

0_0_36554538_1528.cpp: In function 'void solve()':
0_0_36554538_1528.cpp:20:18: error: 'n' was not declared in this scope
  scanf("%d%d%d",&n,&m,&k);
                  ^
0_0_36554538_1528.cpp:20:21: error: 'm' was not declared in this scope
  scanf("%d%d%d",&n,&m,&k);
                     ^
0_0_36554538_1528.cpp:20:24: error: 'k' was not declared in this scope
  scanf("%d%d%d",&n,&m,&k);
                        ^