foo.cpp:3:1: error: 'include' does not name a type
 include<algorithm> 
 ^
foo.cpp: In function 'int main()':
foo.cpp:20:25: error: 'sort' was not declared in this scope
 sort(road+1,road+m+1,cmp);
                         ^
foo.cpp:24:38: error: 'max' was not declared in this scope
 road[i+1].b=max(road[i+1].b,road[i].b);
                                      ^