View Compilation Error

0_0_33534133_30548.cpp: In function 'void build(int, int, int)':
0_0_33534133_30548.cpp:28:34: error: 'scanf_s' was not declared in this scope
         scanf_s("%d", &t[rt].maxn);
                                  ^
0_0_33534133_30548.cpp: In function 'int main()':
0_0_33534133_30548.cpp:75:34: error: 'scanf_s' was not declared in this scope
     while (scanf_s("%d%d", &n, &m) != EOF)
                                  ^
0_0_33534133_30548.cpp:86:13: error: expected ';' at end of input
             ope 
             ^
0_0_33534133_30548.cpp:86:13: error: expected '}' at end of input
0_0_33534133_30548.cpp:86:13: error: expected '}' at end of input
0_0_33534133_30548.cpp:86:13: error: expected '}' at end of input