View Compilation Error

0_0_38788499_23740.cpp: In function 'void SPFA()':
0_0_38788499_23740.cpp:23:32: error: 'clear' was not declared in this scope
   23 |     For(i, 1, n) dis[i] = inf, clear(pre[to[i]]);
      |                                ^~~~~
0_0_38788499_23740.cpp:31:17: error: 'clear' was not declared in this scope
   31 |                 clear(pre[to[i]]);
      |                 ^~~~~