結果
| 問題 |
No.3183 Swap or Rotate
|
| コンテスト | |
| ユーザー |
yamate11
|
| 提出日時 | 2025-06-20 21:32:33 |
| 言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 2 ms / 1,000 ms |
| コード長 | 3,723 bytes |
| コンパイル時間 | 2,997 ms |
| コンパイル使用メモリ | 281,972 KB |
| 実行使用メモリ | 7,844 KB |
| 最終ジャッジ日時 | 2025-06-20 21:32:38 |
| 合計ジャッジ時間 | 3,983 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 21 |
ソースコード
#include <bits/stdc++.h>
#include <cassert>
using namespace std;
using ll = long long int;
using u64 = unsigned long long;
using pll = pair<ll, ll>;
// #include <atcoder/all>
// using namespace atcoder;
#define REP(i, a, b) for (ll i = (a); i < (b); i++)
#define REPrev(i, a, b) for (ll i = (a); i >= (b); i--)
#define ALL(coll) (coll).begin(), (coll).end()
#define SIZE(v) ((ll)((v).size()))
#define REPOUT(i, a, b, exp, sep) REP(i, (a), (b)) cout << (exp) << (i + 1 == (b) ? "" : (sep)); cout << "\n"
// @@ !! LIM(forall f:intDiv)
// ---- inserted library file forall.cc
#define EX_REP_LL(i, from, to) for (ll i = (from); i < (to); i++)
#define EX_REP_RB(x, coll) for (auto x : coll)
#define EXGEN(rep_part, cond, yes, no_behaviour) ([&]() { rep_part if (cond) return (yes); no_behaviour; }())
#define EXISTS_BASE(rep_part, cond) EXGEN(rep_part, cond, true, return false)
#define EXFIND_BASE(rep_part, cond, t) EXGEN(rep_part, cond, t, assert(0))
#define EXFIND_D_BASE(rep_part, cond, t, def) EXGEN(rep_part, cond, t, return def)
#define EXISTS(i, from, to, cond) EXISTS_BASE(EX_REP_LL(i, from, to), cond)
#define FORALL(i, from, to, cond) (not EXISTS(i, from, to, not (cond)))
#define EXFIND(i, from, to, cond) EXFIND_BASE(EX_REP_LL(i, from, to), cond, i)
#define EXFIND_D(i, from, to, cond, def) EXFIND_D_BASE(EX_REP_LL(i, from, to), cond, i, def)
#define EXISTS_C(x, coll, cond) EXISTS_BASE(EX_REP_RB(x, coll), cond)
#define FORALL_C(x, coll, cond) (not EXISTS_C(x, coll, not (cond)))
#define EXFIND_C(x, coll, cond) EXFIND_BASE(EX_REP_RB(x, coll), cond, x)
#define EXFIND_D_C(x, coll, cond, def) EXFIND_D_BASE(EX_REP_RB(x, coll), cond, x, def)
#define COUNT_BASE(rep_part, cond) ([&](){ ll ret = 0; rep_part if (cond) ret++; return ret; }())
#define COUNT(i, from, to, cond) COUNT_BASE(EX_REP_LL(i, from, to), cond)
#define COUNT_C(x, coll, cond) COUNT_BASE(EX_REP_RB(x, coll), cond)
#define IMPLIES(a, b) (not (a) or (b))
// ---- end forall.cc
// ---- inserted function f:intDiv from util.cc
// imod, divFloor, divCeil
// imod(x, y) : remainder of x for y
// for y > 0:
// imod(x, y) = r where x = dy + r, 0 <= r < y
// imod(x, -y) = r where x = dy + r, 0 >= r > y
// Thus, imod( 10, 7) = 3
// imod(-10, 7) = 4
// imod( 10, -7) = -4
// imod(-10, -7) = -3
ll imod(ll x, ll y) {
ll v = x % y;
if ((x >= 0) == (y >= 0)) return v;
else return v == 0 ? 0 : v + y;
}
// Integer Division; regardless pos/neg
ll divFloor(ll x, ll y) {
if (x > 0) {
if (y > 0) return x / y;
else return (x - y - 1) / y;
}else {
if (y > 0) return (x - y + 1) / y;
else return x / y;
}
}
ll divCeil(ll x, ll y) {
if (x > 0) {
if (y > 0) return (x + y - 1) / y;
else return x / y;
}else {
if (y > 0) return x / y;
else return (x + y + 1) / y;
}
}
// Just a note. For d \in Z and t \in R,
// d < t <=> d < ceil(t), d <= t <=> d <= floor(t),
// d > t <=> d > floor(t), d >= t <=> d >= ceil(t).
// ---- end f:intDiv
// @@ !! LIM -- end mark --
int main(/* int argc, char *argv[] */) {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
cout << setprecision(20);
ll N; cin >> N;
// @InpVec(N, P) [yIUCS9IE]
auto P = vector(N, ll());
for (int i = 0; i < N; i++) { ll v; cin >> v; P[i] = v; }
// @End [yIUCS9IE]
string ans;
REPrev(i, N - 2, 0) {
ll j0 = EXFIND(j, 0, N, P[j] == i);
REP(k, 0, j0) {
ans += 'R';
P.push_back(P[0]);
P.erase(P.begin());
}
while (P[1] != i + 1) {
ans += 'S';
swap(P[0], P[1]);
ans += 'R';
P.push_back(P[0]);
P.erase(P.begin());
}
}
cout << ans << endl;
return 0;
}
yamate11