View Compilation Error

0_0_30299960_18967.cpp: In function 'void pushdown(int, int, int, int)':
0_0_30299960_18967.cpp:26:9: error: 'tre' was not declared in this scope
         tre[num*2] = (mid-le+1)*lazy[num*2];
         ^
0_0_30299960_18967.cpp: In function 'void update(int, int, int, int, int, int)':
0_0_30299960_18967.cpp:62:9: error: 'tre' was not declared in this scope
         tre[num] = (ri-le+1)*val;
         ^
0_0_30299960_18967.cpp:72:5: error: 'tre' was not declared in this scope
     tre[num] = tre[num*2] + tre[num*2+1];
     ^