View Compilation Error

0_0_39719097_8342.cpp:2:2: error: expected unqualified-id before numeric constant
    2 |  2 using namespace std;
      |  ^
0_0_39719097_8342.cpp:3:2: error: expected unqualified-id before numeric constant
    3 |  3 struct node{
      |  ^
0_0_39719097_8342.cpp:5:5: error: 'nod' does not name a type
    5 |  5 }nod[1005];
      |     ^~~
0_0_39719097_8342.cpp:6:2: error: expected unqualified-id before numeric constant
    6 |  6 bool cmp(node a,node b){return a.s>b.s;}
      |  ^
0_0_39719097_8342.cpp:7:2: error: expected unqualified-id before numeric constant
    7 |  7 int dp[1005],t[1005];
      |  ^
0_0_39719097_8342.cpp:8:2: error: expected unqualified-id before numeric constant
    8 |  8 int main(){
      |  ^