Submission #409564

#TimeUsernameProblemLanguageResultExecution timeMemory
409564534351MalnaRISC (COI21_malnarisc)C++17
100 / 100
12 ms332 KiB
#include <bits/stdc++.h> using namespace std; template<class T, class U> void ckmin(T &a, U b) { if (a > b) a = b; } template<class T, class U> void ckmax(T &a, U b) { if (a < b) a = b; } mt19937 rng(42); template<class T> T randomize(T mod) { return uniform_int_distribution<T>(0, mod - 1)(rng); } #define MP make_pair #define PB push_back #define LB lower_bound #define UB upper_bound #define fi first #define se second #define SZ(x) ((int) (x).size()) #define ALL(x) (x).begin(), (x).end() #define FOR(i, a, b) for (auto i = (a); i < (b); i++) #define FORD(i, a, b) for (auto i = (a) - 1; i >= (b); i--) typedef long long ll; typedef long double ld; typedef pair<int, int> pii; typedef pair<ll, ll> pll; typedef vector<int> vi; typedef vector<ll> vl; typedef vector<pii> vpi; typedef vector<pll> vpl; int N; vector<vpi> ans; vector<vpi> comb(vector<vpi> l, vector<vpi> r) { if (SZ(l) < SZ(r)) swap(l, r); FOR(i, 0, SZ(r)) { l[i].insert(l[i].end(), ALL(r[i])); } return l; } vector<vpi> genmerge(int L, int R, bool dir) { cerr << "GENMERGE " << L << ' ' << R << endl; if (L == R) { return vector<vpi>(); } vector<vpi> res; res.PB(vpi()); int M = (1 << (31 - __builtin_clz(R - L))); FOR(i, L, R + 1 - M) { pii p = {i, i + M}; if (dir) swap(p.fi, p.se); res.back().PB(p); } auto lt = genmerge(L, L + M - 1, dir); auto rt = genmerge(L + M, R, dir); lt = comb(lt, rt); res.insert(res.end(), ALL(lt)); return res; } //sorts a random L...R vector<vpi> gensort(int L, int R, bool dir) { // cerr << "GENSORT " << L << ' ' << R << endl; if (L == R) { return vector<vpi>(); } int mid = (L + R) >> 1; auto lt = gensort(L, mid, !dir); auto rt = gensort(mid + 1, R, dir); lt = comb(lt, rt); auto cd = genmerge(L, R, dir); lt.insert(lt.end(), ALL(cd)); return lt; } int32_t main() { cout << fixed << setprecision(12); cerr << fixed << setprecision(4); ios_base::sync_with_stdio(false); cin.tie(0); cin >> N; vi arr(N); iota(ALL(arr), 0); FOR(i, 1, N) { swap(arr[i], arr[randomize(i + 1)]); } // for (int i = 1; i < 4 * N; i += i) // { // for (int j = i; j; j >>= 1) // { // ans.PB(vpi()); // for (int k = 0; k < N; k += 2 * j) // { // FOR(m, 0, j) // { // if (k + m + j < N) // { // pii p = {k + m, k + m + j}; // if (k / (2 * i) % 2) // { // swap(p.fi, p.se); // } // ans.back().PB(p); // } // //j, j + i. // } // } // if (ans.back().empty()) // { // ans.pop_back(); // } // } // } ans = gensort(0, N - 1, false); cout << SZ(ans) << '\n'; for (vpi v : ans) { for (pii p : v) { if (arr[p.fi] > arr[p.se]) { swap(arr[p.fi], arr[p.se]); } cout << "CMPSWP R" << p.fi + 1 << " R" << p.se + 1 << ' '; } cout << '\n'; } // FOR(i, 0, N) // { // cerr << arr[i] << ' '; // } // cerr << endl; return 0; }
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