评测姬

#include <bits/stdc++.h>
using namespace std;

signed main() {
    auto ST = chrono::steady_clock::now();

    // do some thing
    
    //mt19937_64 rd(chrono::system_clock::now().time_since_epoch().count());
    //uniform_int_distribution<int> dis(1, 998244353);

    //int P = dis(rd);
    int ans = 0;
    for (int i = 1; i <= 5e8; i++) ans = (ans + i) % 998244353;
    cerr << ans << endl;

    auto ED = chrono::steady_clock::now();
    cerr << "Timer diff : " << chrono::duration<double, milli>(ED - ST).count() << endl;
    return 0;
}

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