View Compilation Error

0_0_19430812_11872.cpp: In function 'int main()':
0_0_19430812_11872.cpp:41:11: error: 'tests' was not declared in this scope
     while(tests--){
           ^
0_0_19430812_11872.cpp:42:25: error: 'n' was not declared in this scope
         scanf("%d%d%d",&n,&m,&p);
                         ^
0_0_19430812_11872.cpp:42:28: error: 'm' was not declared in this scope
         scanf("%d%d%d",&n,&m,&p);
                            ^
0_0_19430812_11872.cpp:42:31: error: 'p' was not declared in this scope
         scanf("%d%d%d",&n,&m,&p);
                               ^