結果

問題 No.584 赤、緑、青の色塗り
ユーザー gew1fw
提出日時 2025-06-12 13:33:49
言語 PyPy3
(7.3.15)
結果
TLE  
実行時間 -
コード長 2,293 bytes
コンパイル時間 369 ms
コンパイル使用メモリ 82,512 KB
実行使用メモリ 82,408 KB
最終ジャッジ日時 2025-06-12 13:39:58
合計ジャッジ時間 5,249 ms
ジャッジサーバーID
（参考情報） 		judge5 / judge1
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 6
other AC * 7 TLE * 1 -- * 6
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

diff # 

MOD = 10**9 + 7

def main():
    import sys
    from collections import defaultdict

    N, R, G, B = map(int, sys.stdin.readline().split())
    total = R + G + B
    if total > N:
        print(0)
        return
    
    # Initialize DP with (prev_color, streak, r_remain, g_remain, b_remain)
    # prev_color: 0=R, 1=G, 2=B, 3=blank
    dp = defaultdict(int)
    initial_state = (3, 0, R, G, B)
    dp[initial_state] = 1
    
    for _ in range(N):
        next_dp = defaultdict(int)
        for (prev_color, streak, r, g, b), cnt in dp.items():
            # Option 1: Place blank
            new_streak = 0
            new_pc = 3
            key = (new_pc, new_streak, r, g, b)
            next_dp[key] = (next_dp[key] + cnt) % MOD
            
            # Option 2: Place Red
            if r > 0 and prev_color != 0:
                if streak < 2:
                    new_r = r - 1
                    new_streak = streak + 1 if prev_color != 3 else 1
                    new_pc = 0
                    if new_streak <= 2 and new_r >= 0:
                        key = (new_pc, new_streak, new_r, g, b)
                        next_dp[key] = (next_dp[key] + cnt) % MOD
            
            # Option 3: Place Green
            if g > 0 and prev_color != 1:
                if streak < 2:
                    new_g = g - 1
                    new_streak = streak + 1 if prev_color != 3 else 1
                    new_pc = 1
                    if new_streak <= 2 and new_g >= 0:
                        key = (new_pc, new_streak, r, new_g, b)
                        next_dp[key] = (next_dp[key] + cnt) % MOD
            
            # Option 4: Place Blue
            if b > 0 and prev_color != 2:
                if streak < 2:
                    new_b = b - 1
                    new_streak = streak + 1 if prev_color != 3 else 1
                    new_pc = 2
                    if new_streak <= 2 and new_b >= 0:
                        key = (new_pc, new_streak, r, g, new_b)
                        next_dp[key] = (next_dp[key] + cnt) % MOD
        
        dp = next_dp
    
    result = 0
    for (pc, s, r, g, b), cnt in dp.items():
        if r == 0 and g == 0 and b == 0:
            result = (result + cnt) % MOD
    print(result)

if __name__ == "__main__":
    main()
0