View Compilation Error

0_0_25884613_4996.cpp: In function 'void dfs(int)':
0_0_25884613_4996.cpp:151:12: error: expected primary-expression before 'if'
         if(if(vis[v])) continue;
            ^
0_0_25884613_4996.cpp:151:12: error: expected ')' before 'if'
0_0_25884613_4996.cpp:152:17: error: too many arguments to function 'void dfs(int)'
         dfs(v, u);
                 ^
0_0_25884613_4996.cpp:136:6: note: declared here
 void dfs(int u) {
      ^
0_0_25884613_4996.cpp: In function 'void solve()':
0_0_25884613_4996.cpp:204:71: error: too many arguments to function 'void dfs(int)'
         for(int i = 1;i <= num;i++) if(!vis[p[i]]) { ++id; dfs(p[i], 0); }
                                                                       ^
0_0_25884613_4996.cpp:136:6: note: declared here
 void dfs(int u) {
      ^