cpp-ptit/CPP0120.cpp at main · hoangpc0112/cpp-ptit · GitHub

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#include <bits/stdc++.h>
#define MOD 1000000007
#define MAX 10000001
#define ll long long

using namespace std;

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int t;
    cin >> t;
    while (t--) {
        int m, n, a, b, cnt = 0;
        cin >> m >> n >> a >> b;
        for (int i = m; i <= n; i++) {
            if (i % a == 0 || i % b == 0)
                ++cnt;
        }
        cout << cnt << endl;
    }
    return 0;
}