View Compilation Error

0_0_39634427_15418.cpp: In function 'int main()':
0_0_39634427_15418.cpp:45:1: error: 'assert' was not declared in this scope
   45 | assert(dis[a][b]<100000000);
      | ^~~~~~
0_0_39634427_15418.cpp:4:1: note: 'assert' is defined in header '<cassert>'; did you forget to '#include <cassert>'?
    3 |  #include<algorithm>
  +++ |+#include <cassert>
    4 |  using namespace std;