View Compilation Error

0_0_20688010_17867.cpp:2:9: error: expected constructor, destructor, or type conversion before '(' token
   memset(pos,-1,sizeof pos);
         ^
0_0_20688010_17867.cpp:3:3: error: expected unqualified-id before 'for'
   for(int i=0;i<n;++i){
   ^
0_0_20688010_17867.cpp:3:15: error: 'i' does not name a type
   for(int i=0;i<n;++i){
               ^
0_0_20688010_17867.cpp:3:19: error: expected unqualified-id before '++' token
   for(int i=0;i<n;++i){
                   ^
0_0_20688010_17867.cpp:7:3: error: 's' does not name a type
   s[n]=n;
   ^
0_0_20688010_17867.cpp:8:3: error: expected unqualified-id before 'for'
   for(int i=1;i<=m;++i){
   ^
0_0_20688010_17867.cpp:8:15: error: 'i' does not name a type
   for(int i=1;i<=m;++i){
               ^
0_0_20688010_17867.cpp:8:20: error: expected unqualified-id before '++' token
   for(int i=1;i<=m;++i){
                    ^