View Compilation Error

0_0_29377898_31985.c: In function 'Hungary':
0_0_29377898_31985.c:18:14: error: 'true' undeclared (first use in this function)
  visitx[u] = true;
              ^
0_0_29377898_31985.c:18:14: note: each undeclared identifier is reported only once for each function it appears in
0_0_29377898_31985.c:38:9: error: 'false' undeclared (first use in this function)
  return false;
         ^
0_0_29377898_31985.c: In function 'KM_perfect_match':
0_0_29377898_31985.c:53:16: error: 'INT_MAX' undeclared (first use in this function)
     slack[j] = INT_MAX;
                ^
0_0_29377898_31985.c:56:19: error: 'false' undeclared (first use in this function)
    memset(visitx, false, sizeof(visitx));
                   ^