View Compilation Error

0_0_36319046_20626.cpp:39:39: error: expected ']' before ';' token
 int vis[100010],ans[100010],fen[100010;
                                       ^
0_0_36319046_20626.cpp: In function 'bool cmp(sut, sut)':
0_0_36319046_20626.cpp:60:12: error: 'fen' was not declared in this scope
     return fen[m.lx]==fen[n.lx]?m.rx<n.rx:fen[m.lx]<fen[n.lx];
            ^
0_0_36319046_20626.cpp: In function 'int main()':
0_0_36319046_20626.cpp:88:13: error: 'fen' was not declared in this scope
             fen[i]=i / sqrt(n);
             ^