CPZT ACGO

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#include <iostream>
using namespace std;
int n;
int main () {
    cin >> n;
    n = (n + 1) % 7;
    if (n == 1) {
        cout << "monday";
    }else if (n == 2) {
        cout << "tuesday";
    }else if (n == 3) {
        cout << "wednesday";
    }else if (n == 4) {
        cout << "thursday";
    }else if (n == 5) {
        cout << "friday";
    }else if (n == 6) {
        cout << "saturday";
    }else if (n == 0) {
        cout << "sunday";
    }
    return 0;
}