View Compilation Error

0_0_33980688_6234.cpp:10:10: error: '::main' must return 'int'
 int main()
          ^
0_0_33980688_6234.cpp: In function 'int main()':
0_0_33980688_6234.cpp:16:9: error: expected ';' before 'scanf'
         scanf("%d%d%d",&n,&m,&k);
         ^