View Compilation Error

0_0_14286368_18098.c:9:1: error: unknown type name 'bool'
 bool in[MAX], vis[MAX];
 ^
0_0_14286368_18098.c: In function 'DFS':
0_0_14286368_18098.c:23:14: error: 'true' undeclared (first use in this function)
     vis[u] = true;
              ^
0_0_14286368_18098.c:23:14: note: each undeclared identifier is reported only once for each function it appears in
0_0_14286368_18098.c: In function 'main':
0_0_14286368_18098.c:47:20: error: 'false' undeclared (first use in this function)
         memset(in, false, sizeof(in));
                    ^