B. Regular Bracket Sequence

合集 - 记录随手刷过的编程题(76)

1.E. Arranging The Sheep2024-02-282.C. Team2024-02-293.C. RationalLee2024-03-014.B. Preparing Olympiad2024-03-055.B. Find The Array2024-03-056.E. Accidental Victory2024-03-067.A. Learning Languages2024-03-078.A. k-th divisor2024-03-089.B. Quasi Binary2024-03-0910.蓝桥杯-地宫取宝2024-03-0911.D. Divide by three, multiply by two2024-03-1212.D. Game With Array2024-03-1313.B. Composite Coloring2024-03-1414.洛谷 P1204 [USACO1.2] 挤牛奶Milking Cows2024-04-2015.洛谷 P3353 在你窗外闪耀的星星2024-04-2216.洛谷 P8818 [CSP-S 2022] 策略游戏2024-04-2317.Educational Codeforces Round 164 (Rated for Div. 2)2024-04-2518.E. Chain Reaction2024-04-2619.Manthan, Codefest 18 (rated, Div. 1 + Div. 2) D. Valid BFS?2024-04-2920.D. Distance in Tree2024-04-2921.D. Multiplication Table2024-04-3022.C. Mixing Water2024-05-0123.B. Greg and Graph2024-05-0624.D. Another Problem About Dividing Numbers2024-05-0725.Acwing 143. 最大异或对2024-05-0726.Acwing 3485. 最大异或和2024-05-0727.C. Checkposts2024-05-0828.E. Lomsat gelral2024-05-1129.D. Powerful array2024-05-1530.D. Deleting Divisors2024-05-1631.Codeforces Round 950 (Div. 3)2024-06-0432.Codeforces Round 951 (Div. 2)2024-06-0733.SuntoryProgrammingContest2024（AtCoder Beginner Contest 357）2024-06-0934.Codeforces Round 952 (Div. 4)2024-06-1235.AtCoder Beginner Contest 3582024-06-1736.B. Modulo Sum2024-06-2137.D. Soldier and Number Game2024-06-2238.AtCoder Beginner Contest 3592024-06-2439.Codeforces Round 954 (Div. 3)2024-06-2440.Codeforces Round 955 (Div. 2, with prizes from NEAR!)2024-06-2641.AtCoder Regular Contest 1802024-06-3042.D - Ghost Ants2024-07-0343.AtCoder Beginner Contest 361）2024-07-0744.Codeforces Round 957 (Div. 3)2024-07-1245.E. Decode2024-07-2946.Educational Codeforces Round 168 (Rated for Div. 2)2024-08-0647.B. Parity and Sum2024-08-0848.P1972 [SDOI2009] HH的项链2024-08-1249.Codeforces Round 966 (Div. 3) VP2024-08-1550.https://codeforces.com/contest/2004/problem/B2024-08-1951.C. Splitting Items2024-08-1952.D. Colored Portals2024-08-2053.Codeforces Round 967 (Div. 2)2024-08-2154.D. Determine Winning Islands in Race2024-08-2355.C. Turtle and Good Pairs2024-08-2856.Codeforces Round 970 (Div. 3)（VP）2024-09-0357.G. Sakurako's Task2024-09-0458.Codeforces Round 971 (Div. 4)2024-09-0459.C. Lazy Narek2024-09-19

60.B. Regular Bracket Sequence02-21

61.C. News Distribution02-2162.B. Karen and Coffee02-2163.G. 2^Sort02-2564.C. Johnny and Another Rating Drop03-0465.A. Greg and Array03-0566.D2. Magic Powder - 203-0667.C. Schedule Management03-0668.C. Constanze's Machine03-0769.C. Soldier and Cards03-0870.C. Berland Regional03-1071.E. Anna and the Valentine's Day Gift03-1172.B. Polo the Penguin and Matrix03-1273.B. Fortune Telling03-1374.C. Powers Of Two03-1375.D. Palindromes Coloring03-1476.C. Phoenix and Towers03-15

收起

https://codeforces.com/contest/26/problem/B

给定一个包含括号的字符串，问最少移除多少字符可以让字符串合法

两个点，第一是如果当前）超标了，那这个必须删除。第二是遍历完所有字符后，如果（是多的，要算到总数里面。

inline void solve(){
	string s;
	cin >> s;

	int cnt = 0;
	int ans = 0;

	for (const auto& x : s) {
		cnt += (x == '(' ? 1 : -1);
		if (cnt < 0) {
			cnt = 0;
			ans ++;
		}
	}
	ans += cnt;
	cout << s.size() - ans << '\n';
}