View Compilation Error

0_0_33533728_28053.cpp: In function 'void build(int, int, int)':
0_0_33533728_28053.cpp:28:34: error: 'scanf_s' was not declared in this scope
         scanf_s("%d", &t[rt].maxn);
                                  ^
0_0_33533728_28053.cpp: In function 'int main()':
0_0_33533728_28053.cpp:70:34: error: 'scanf_s' was not declared in this scope
     while (scanf_s("%d%d", &n, &m) != EOF)
                                  ^
0_0_33533728_28053.cpp:82:36: error: expected primary-expression before '%' token
             scanf_s("%d%d", &num1, %2
                                    ^
0_0_33533728_28053.cpp:82:37: error: expected '}' at end of input
             scanf_s("%d%d", &num1, %2
                                     ^
0_0_33533728_28053.cpp:82:37: error: expected '}' at end of input
0_0_33533728_28053.cpp:82:37: error: expected '}' at end of input