#757809 (C++23) No.1924 3 color painting on a line

提出ソース

結果

問題	No.1924 3 color painting on a line
ユーザー	hitonanode
提出日時	2022-05-02 23:52:51
言語	C++23 (gcc 12.3.0 + boost 1.83.0)
結果	AC
実行時間	26 ms / 2,000 ms
コード長	6,914 bytes
コンパイル時間	2,250 ms
コンパイル使用メモリ	184,320 KB
実行使用メモリ	6,948 KB
最終ジャッジ日時	2024-07-02 03:59:07
合計ジャッジ時間	4,304 ms
ジャッジサーバーID （参考情報）	judge3 / judge2

このコードへのチャレンジ
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テストケース

テストケース表示

入力	結果	実行時間実行使用メモリ
testcase_00	AC	2 ms 6,816 KB
testcase_01	AC	2 ms 6,944 KB
testcase_02	AC	2 ms 6,940 KB
testcase_03	AC	24 ms 6,944 KB
testcase_04	AC	24 ms 6,940 KB
testcase_05	AC	23 ms 6,940 KB
testcase_06	AC	24 ms 6,948 KB
testcase_07	AC	24 ms 6,940 KB
testcase_08	AC	23 ms 6,940 KB
testcase_09	AC	24 ms 6,940 KB
testcase_10	AC	24 ms 6,944 KB
testcase_11	AC	24 ms 6,944 KB
testcase_12	AC	24 ms 6,940 KB
testcase_13	AC	24 ms 6,940 KB
testcase_14	AC	24 ms 6,940 KB
testcase_15	AC	24 ms 6,940 KB
testcase_16	AC	24 ms 6,944 KB
testcase_17	AC	23 ms 6,940 KB
testcase_18	AC	24 ms 6,940 KB
testcase_19	AC	24 ms 6,940 KB
testcase_20	AC	24 ms 6,940 KB
testcase_21	AC	24 ms 6,940 KB
testcase_22	AC	26 ms 6,940 KB
testcase_23	AC	9 ms 6,940 KB
testcase_24	AC	23 ms 6,944 KB
testcase_25	AC	18 ms 6,944 KB
testcase_26	AC	4 ms 6,940 KB
testcase_27	AC	14 ms 6,944 KB
testcase_28	AC	9 ms 6,940 KB
testcase_29	AC	6 ms 6,944 KB
testcase_30	AC	6 ms 6,940 KB
testcase_31	AC	5 ms 6,944 KB
testcase_32	AC	18 ms 6,940 KB
testcase_33	AC	16 ms 6,940 KB
testcase_34	AC	20 ms 6,944 KB
testcase_35	AC	16 ms 6,940 KB
testcase_36	AC	12 ms 6,940 KB
testcase_37	AC	13 ms 6,944 KB
testcase_38	AC	15 ms 6,944 KB
testcase_39	AC	4 ms 6,940 KB
testcase_40	AC	2 ms 6,944 KB
testcase_41	AC	10 ms 6,940 KB
testcase_42	AC	24 ms 6,944 KB

権限があれば一括ダウンロードができます

ソースコード

raw source code

#include <algorithm>
#include <array>
#include <bitset>
#include <cassert>
#include <chrono>
#include <cmath>
#include <complex>
#include <deque>
#include <forward_list>
#include <fstream>
#include <functional>
#include <iomanip>
#include <ios>
#include <iostream>
#include <limits>
#include <list>
#include <map>
#include <numeric>
#include <queue>
#include <random>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <tuple>
#include <type_traits>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
using namespace std;
using lint = long long;
using pint = pair<int, int>;
using plint = pair<lint, lint>;
struct fast_ios { fast_ios(){ cin.tie(nullptr), ios::sync_with_stdio(false), cout << fixed << setprecision(20); }; } fast_ios_;
#define ALL(x) (x).begin(), (x).end()
#define FOR(i, begin, end) for(int i=(begin),i##_end_=(end);i<i##_end_;i++)
#define IFOR(i, begin, end) for(int i=(end)-1,i##_begin_=(begin);i>=i##_begin_;i--)
#define REP(i, n) FOR(i,0,n)
#define IREP(i, n) IFOR(i,0,n)
template <typename T, typename V>
void ndarray(vector<T>& vec, const V& val, int len) { vec.assign(len, val); }
template <typename T, typename V, typename... Args> void ndarray(vector<T>& vec, const V& val, int len, Args... args) { vec.resize(len), for_each(begin(vec), end(vec), [&](T& v) { ndarray(v, val, args...); }); }
template <typename T> bool chmax(T &m, const T q) { return m < q ? (m = q, true) : false; }
template <typename T> bool chmin(T &m, const T q) { return m > q ? (m = q, true) : false; }
int floor_lg(long long x) { return x <= 0 ? -1 : 63 - __builtin_clzll(x); }
template <typename T1, typename T2> pair<T1, T2> operator+(const pair<T1, T2> &l, const pair<T1, T2> &r) { return make_pair(l.first + r.first, l.second + r.second); }
template <typename T1, typename T2> pair<T1, T2> operator-(const pair<T1, T2> &l, const pair<T1, T2> &r) { return make_pair(l.first - r.first, l.second - r.second); }
template <typename T> vector<T> sort_unique(vector<T> vec) { sort(vec.begin(), vec.end()), vec.erase(unique(vec.begin(), vec.end()), vec.end()); return vec; }
template <typename T> int arglb(const std::vector<T> &v, const T &x) { return std::distance(v.begin(), std::lower_bound(v.begin(), v.end(), x)); }
template <typename T> int argub(const std::vector<T> &v, const T &x) { return std::distance(v.begin(), std::upper_bound(v.begin(), v.end(), x)); }
template <typename T> istream &operator>>(istream &is, vector<T> &vec) { for (auto &v : vec) is >> v; return is; }
template <typename T> ostream &operator<<(ostream &os, const vector<T> &vec) { os << '['; for (auto v : vec) os << v << ','; os << ']'; return os; }
template <typename T, size_t sz> ostream &operator<<(ostream &os, const array<T, sz> &arr) { os << '['; for (auto v : arr) os << v << ','; os << ']'; return os; }
#if __cplusplus >= 201703L
template <typename... T> istream &operator>>(istream &is, tuple<T...> &tpl) { std::apply([&is](auto &&... args) { ((is >> args), ...);}, tpl); return is; }
template <typename... T> ostream &operator<<(ostream &os, const tuple<T...> &tpl) { os << '('; std::apply([&os](auto &&... args) { ((os << args << ','), ...);}, tpl); return os << ')'; }
#endif
template <typename T> ostream &operator<<(ostream &os, const deque<T> &vec) { os << "deq["; for (auto v : vec) os << v << ','; os << ']'; return os; }
template <typename T> ostream &operator<<(ostream &os, const set<T> &vec) { os << '{'; for (auto v : vec) os << v << ','; os << '}'; return os; }
template <typename T, typename TH> ostream &operator<<(ostream &os, const unordered_set<T, TH> &vec) { os << '{'; for (auto v : vec) os << v << ','; os << '}'; return os; }
template <typename T> ostream &operator<<(ostream &os, const multiset<T> &vec) { os << '{'; for (auto v : vec) os << v << ','; os << '}'; return os; }
template <typename T> ostream &operator<<(ostream &os, const unordered_multiset<T> &vec) { os << '{'; for (auto v : vec) os << v << ','; os << '}'; return os; }
template <typename T1, typename T2> ostream &operator<<(ostream &os, const pair<T1, T2> &pa) { os << '(' << pa.first << ',' << pa.second << ')'; return os; }
template <typename TK, typename TV> ostream &operator<<(ostream &os, const map<TK, TV> &mp) { os << '{'; for (auto v : mp) os << v.first << "=>" << v.second << ','; os << '}'; return os; }
template <typename TK, typename TV, typename TH> ostream &operator<<(ostream &os, const unordered_map<TK, TV, TH> &mp) { os << '{'; for (auto v : mp) os << v.first << "=>" << v.second << ','; os << '}'; return os; }
#ifdef HITONANODE_LOCAL
const string COLOR_RESET = "\033[0m", BRIGHT_GREEN = "\033[1;32m", BRIGHT_RED = "\033[1;31m", BRIGHT_CYAN = "\033[1;36m", NORMAL_CROSSED = "\033[0;9;37m", RED_BACKGROUND = "\033[1;41m", NORMAL_FAINT = "\033[0;2m";
#define dbg(x) cerr << BRIGHT_CYAN << #x << COLOR_RESET << " = " << (x) << NORMAL_FAINT << " (L" << __LINE__ << ") " << __FILE__ << COLOR_RESET << endl
#define dbgif(cond, x) ((cond) ? cerr << BRIGHT_CYAN << #x << COLOR_RESET << " = " << (x) << NORMAL_FAINT << " (L" << __LINE__ << ") " << __FILE__ << COLOR_RESET << endl : cerr)
#else
#define dbg(x) 0
#define dbgif(cond, x) 0
#endif

string trim(const string &s) {
    string ret;
    for (auto c : s) {
        if (ret.empty() or ret.back() != c) ret += c;
    }
    return ret;
}

int subsol(string S, const vector<char> &D) {
    S = D[0] + S + D[0];
    int N = S.size();
    vector<int> height(N + 1), cost(N + 1);
    height[0] = 0;
    cost[0] = 1;
    REP(i, N) {
        int d = find(ALL(D), S[i]) - D.begin();
        if ((height[i] + 300000000) % 3 == d) {
            height[i + 1] = height[i];
            cost[i + 1] = cost[i];
        } else if ((height[i] + 1 + 300000000) % 3 == d) {
            height[i + 1] = height[i] + 1;
            cost[i + 1] = cost[i] + (height[i] >= 0);
        } else {
            height[i + 1] = height[i] - 1;
            cost[i + 1] = cost[i] + (height[i] <= 0);
        }
    }
    dbg(make_pair(S, D));
    dbg(make_pair(cost[N], height));
    int ret = cost[N];
    if (height.back()) ret -= abs(height.back()) / 3;
    int h = 0, c = 1;
    IREP(i, N) {
        int d = find(ALL(D), S[i]) - D.begin();
        assert(D[d] == S[i]);
        if ((h + 300000000) % 3 == d) {
            ;
        } else if ((h + 300000000 + 1) % 3 == d) {
            c += (h >= 0);
            ++h;
        } else {
            c += (h <= 0);
            --h;
        }
        if (h == height[i + 1]) chmin(ret, cost[i + 1] + c - abs(h));
    }
    return ret;
}

int main() {
    int N;
    string S;
    cin >> N >> S;
    S = trim(S), N = S.size();
    dbg(S);

    int ret = N;
    REP(T, 2) {
        vector<char> D{'R', 'G', 'B'};
        sort(ALL(D));
        do {
            chmin(ret, subsol(S, D));
        } while (next_permutation(ALL(D)));
        reverse(ALL(S));
    }
    cout << ret << '\n';
}

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結果

テストケース

ソースコード