View Compilation Error

0_0_30305026_9343.cpp:9:1: error: 'point' does not name a type
 point s[MAXN];
 ^
0_0_30305026_9343.cpp: In function 'void dfs(int, int, int)':
0_0_30305026_9343.cpp:76:2: error: 's' was not declared in this scope
  s[++lens] = d[x] - w;
  ^
0_0_30305026_9343.cpp: In function 'void get_ans(int, int, int)':
0_0_30305026_9343.cpp:89:25: error: 's' was not declared in this scope
   int tmp = lower_bound(s+1,s+lens+1,point(dis[x],x)) - s - 1;
                         ^
0_0_30305026_9343.cpp: In function 'void cal(int, int, int)':
0_0_30305026_9343.cpp:103:2: error: 's' was not declared in this scope
  s[++lens] = d[x] - w;
  ^