Submission #997966

#	Time	Username	Problem	Language	Result	Execution time	Memory
997966		green_gold_dog	MalnaRISC (COI21_malnarisc)	C++17	76.85 / 100	1 ms	348 KiB

malnarisc

//#pragma GCC optimize("Ofast")
//#pragma GCC target("avx,avx2,sse,sse2,sse3,ssse3,sse4,abm,popcnt,mmx")
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef double db;
typedef long double ldb;
typedef complex<double> cd;

constexpr ll INF64 = 9'000'000'000'000'000'000, INF32 = 2'000'000'000, MOD = 1'000'000'007, MAXC = 1'000;
constexpr db PI = acos(-1);
constexpr bool IS_FILE = false, IS_TEST_CASES = false;

random_device rd;
mt19937 rnd32(rd());
mt19937_64 rnd64(rd());

template<typename T>
bool assign_max(T& a, T b) {
        if (b > a) {
                a = b;
                return true;
        }
        return false;
}

template<typename T>
bool assign_min(T& a, T b) {
        if (b < a) {
                a = b;
                return true;
        }
        return false;
}

template<typename T>
T square(T a) {
        return a * a;
}

template<>
struct std::hash<pair<ll, ll>> {
        ll operator() (pair<ll, ll> p) const {
                return ((__int128)p.first * MOD + p.second) % INF64;
        }
};

void rec(ll l, ll r, vector<vector<pair<ll, ll>>>& op, vector<ll>& lu) {
        if (r - l <= 0) {
                return;
        }
        ll mid = (l + r - 1) / 2;
        rec(l, mid, op, lu);
        rec(mid + 1, r, op, lu);
        ll fl = l, fr = mid;
        ll sl = mid + 1, sr = r;
        while (sl <= sr) {
                ll now = sr;
                for (ll i = fr; i >= fl; i--) {
                        ll num = max(lu[now], lu[i]) + 1;
                        op[num].emplace_back(i, now);
                        lu[now] = num;
                        lu[i] = num;
                        now--;
                }
                sr--;
                if (now < sl) {
                        fl++;
                }
        }
}

void solve() {
        ll n;
        cin >> n;
        vector<vector<pair<ll, ll>>> op(MAXC);
        vector<ll> lu(n + 1, -1);
        rec(1, n, op, lu);
        while (op.back().empty()) {
                op.pop_back();
        }
        cout << op.size() << '\n';
        for (auto i : op) {
                for (auto[a, b] : i) {
                        cout << "CMPSWP " << "R" << a << ' ' << "R" << b << ' ';
                }
                cout << '\n';
        }
}

int main() {
        if (IS_FILE) {
                freopen("", "r", stdin);
                freopen("", "w", stdout);
        }
        ios_base::sync_with_stdio(false);
        cin.tie(0);
        cout.tie(0);
        ll t = 1;
        if (IS_TEST_CASES) {
                cin >> t;
        }
        for (ll i = 0; i < t; i++) {
                solve();
        }
}

Compilation message (stderr)

malnarisc.cpp: In function 'int main()':
malnarisc.cpp:95:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   95 |                 freopen("", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~
malnarisc.cpp:96:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   96 |                 freopen("", "w", stdout);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 8.25 / 10
• Subtask 3: 8.4444444444 / 10
• Subtask 4: 7.6666666667 / 10
• Subtask 5: 7.1481481481 / 10
• Subtask 6: 7.213592233 / 10
• Subtask 7: 7.0526315789 / 10
• Subtask 8: 7.0303030303 / 10
• Subtask 9: 7.0402684564 / 10
• Subtask 10: 7.0060240964 / 10