View Compilation Error

0_0_32389051_9242.cpp: In function 'bool solve()':
0_0_32389051_9242.cpp:23:10: error: expected unqualified-id before numeric constant
  for(int 0;i<n;i++) vis[i] = 0;
          ^
0_0_32389051_9242.cpp:23:10: error: expected ';' before numeric constant
0_0_32389051_9242.cpp:23:12: error: 'i' was not declared in this scope
  for(int 0;i<n;i++) vis[i] = 0;
            ^
0_0_32389051_9242.cpp:23:15: error: expected ')' before ';' token
  for(int 0;i<n;i++) vis[i] = 0;
               ^
0_0_32389051_9242.cpp:23:16: error: 'i' was not declared in this scope
  for(int 0;i<n;i++) vis[i] = 0;
                ^
0_0_32389051_9242.cpp: In function 'int main()':
0_0_32389051_9242.cpp:36:7: error: expected '(' before '!' token
  while!(~scanf("%d %d", &n, &m)){
       ^
0_0_32389051_9242.cpp:36:33: error: expected ')' before '{' token
  while!(~scanf("%d %d", &n, &m)){
                                 ^
0_0_32389051_9242.cpp:44:13: error: 'add' was not declared in this scope
    add(u,v^1);
             ^