View Compilation Error

0_0_26788903_31797.cpp:1:8: error: expected constructor, destructor, or type conversion before ';' token
  init();
        ^
0_0_26788903_31797.cpp:4:5: error: 's' does not name a type
     s = 0, e = 2 * n + 1;
     ^
0_0_26788903_31797.cpp:5:5: error: expected unqualified-id before 'for'
     for (int i = 1; i <= n; i++) {
     ^
0_0_26788903_31797.cpp:5:21: error: 'i' does not name a type
     for (int i = 1; i <= n; i++) {
                     ^
0_0_26788903_31797.cpp:5:29: error: 'i' does not name a type
     for (int i = 1; i <= n; i++) {
                             ^
0_0_26788903_31797.cpp:11:21: error: 'dinic' was not declared in this scope
     int ans = dinic();
                     ^
0_0_26788903_31797.cpp:12:11: error: expected constructor, destructor, or type conversion before '(' token
     printf("%d\n",ans);
           ^