View Compilation Error

0_0_15230209_31976.cpp:2:11: error: '::main' must return 'int'
 void main()
           ^
0_0_15230209_31976.cpp: In function 'int main()':
0_0_15230209_31976.cpp:20:10: error: expected '}' at end of input
       s=0;
          ^
0_0_15230209_31976.cpp:20:10: error: expected '}' at end of input
0_0_15230209_31976.cpp:20:10: error: expected '}' at end of input