GCD queries

#include <bits/stdc++.h>
#define UNVISITED -1
#define BIGINT 1 << 25
#define _ ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0), cout.precision(15);
using namespace std;

typedef long long int64;
typedef pair<int, int> ii;

vector<int> num;

int gcd(int a, int b){
    while(b > 0){
        int temp = b;
        b = a % b;
        a = temp;
    }
    return a;
}

int gcdList(int a, int b){
    if(a == b)  return num[a];

    int mid = (a + b) / 2;
    int gcdA = gcdList(a, mid);
    int gcdB = gcdList(mid + 1, b);

    return gcd(gcdA, gcdB);
}

int main(){ _
    int n,  q;  cin >> n >> q;
    num.assign(n + 1, 0);
    for(int i = 1; i <= n; ++i) cin >> num[i];

    char op;    int a, b;
    for(int i = 0; i < q; ++i){
        cin >> op >> a >> b;
        if(op == 'u')   num[a] = b;
        else {
            cout << gcdList(a, b) << endl;
        }
    }
    return 0;
}

Test 1

Verdict: UNKNOWN

Test 2

Verdict: UNKNOWN

Test 3

Verdict: UNKNOWN

Test 4

Verdict: UNKNOWN

Test 5

Verdict: UNKNOWN

Test 6

Verdict: UNKNOWN

Test 7

Verdict: UNKNOWN

Test 8

Verdict: UNKNOWN

Test 9

Verdict: UNKNOWN

Test 10

Verdict: UNKNOWN

Test 11

Verdict: UNKNOWN

Test 12

Verdict: UNKNOWN

Test 13

Verdict: UNKNOWN

Test 14

Verdict: UNKNOWN

Test 15

Verdict: UNKNOWN

Test 16

Verdict: UNKNOWN

Test 17

Verdict: UNKNOWN

Test 18

Verdict: UNKNOWN

Test 19

Verdict: UNKNOWN

Test 20

Verdict: UNKNOWN

Test 21

Verdict: UNKNOWN

Test 22

Verdict: UNKNOWN

Test 23

Verdict: UNKNOWN

Test 24

Verdict: UNKNOWN

Test 25

Verdict: UNKNOWN

Test 26

Verdict: UNKNOWN

Test 27

Verdict: UNKNOWN

Test 28

Verdict: UNKNOWN

Test 29

Verdict: UNKNOWN

Test 30

Verdict: UNKNOWN

Test 31

Verdict: UNKNOWN

Test 32

Verdict: UNKNOWN

Test 33

Verdict: UNKNOWN