Submission #58939808

---

Source Code Expand

/*
#pragma GCC optimize("Ofast,unroll-loops")
#pragma GCC target("avx2,fma,bmi,bmi2,sse4.2,popcnt,lzcnt")
*/

#include <bits/stdc++.h>
#define taskname ""
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define i64 long long
#define isz(x) (int)x.size()
using namespace std;

void solve() {
    int n, q;
    cin >> n >> q;

    int l = 0, r = 1, res = 0;
    while (q--) {
        string s;
        int pos;
        cin >> s >> pos;
        --pos;

        if (s[0] == 'L') {
            int ol = l, cnt = 0;
            while (l != pos) {
                if (l == r) {
                    break;
                }
                l = (l + 1) % n;
                ++cnt;
            }
            if (l == r) {
                l = ol, cnt = 0;
                while (l != pos) {
                    l = (l + n - 1) % n;
                    ++cnt;
                }
            }
            res += cnt;
        }
        else {
            int old_r = r, cnt = 0;
            while (r != pos) {
                if (l == r) {
                    break;
                }
                r = (r + 1) % n;
                ++cnt;
            }
            if (l == r) {
                r = old_r, cnt = 0;
                while (r != pos) {
                    r = (r + n - 1) % n;
                    ++cnt;
                }
            }
            res += cnt;
        }
    }
    cout << res << endl;
}

signed main() {

#ifndef CDuongg
    if (fopen(taskname".inp", "r"))
        assert(freopen(taskname".inp", "r", stdin)), assert(freopen(taskname".out", "w", stdout));
#else
    freopen("bai3.inp", "r", stdin);
    freopen("bai3.out", "w", stdout);
    auto start = chrono::high_resolution_clock::now();
#endif

    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int t = 1; //cin >> t;
    while(t--) solve();

#ifdef CDuongg
   auto end = chrono::high_resolution_clock::now();
   cout << "\n"; for(int i = 1; i <= 100; ++i) cout << '=';
   cout << "\nExecution time: " << chrono::duration_cast<chrono::milliseconds> (end - start).count() << "[ms]" << endl;
#endif

}

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