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XJTU Summer Holiday Test 1(Brackets in Implications-构造)
B - Brackets in Implications Time Limit:2000MS     Memory Limit:262144KB     64bit IO Format:%I64d & %I64u Submit Status Description Implication is a function of two logical arguments,...
分类:其他好文   时间:2015-07-12 17:31:39    阅读次数:124
1626 - Brackets sequence(DP)
和前面一样,要注意状态的枚举顺序,边界是d[i+1][i] = 0 和d[i][i] = 1  ,所以枚举的区间应该从小到大,大区间依赖于小区间的最优解 。 然后就是状态的转移,是如何转移的呢? d[i][j]表示字符串i~j的最优解,那么先检查i与j是否匹配,如果匹配,状态转移可以转移到d[i+1][j-1] 。 无论是否匹配,状态还都能转移到子区间上:d[i][k] 和 d[k+1][j] ...
分类:其他好文   时间:2015-07-12 17:30:25    阅读次数:101
LeetCode20:Valid Parentheses
Given a string containing just the characters ‘(‘, ‘)’, ‘{‘, ‘}’, ‘[’ and ‘]’, determine if the input string is valid. The brackets must close in the correct order, “()” and “()[]{}” are all valid...
分类:其他好文   时间:2015-07-11 01:06:18    阅读次数:177
[LeetCode][Java] Valid Parentheses
题目: Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. The brackets must close in the correct order, "()" and "()[]{}" are...
分类:编程语言   时间:2015-07-10 15:29:38    阅读次数:98
LeetCode Valid Parentheses
Given a string containing just the characters'(',')','{','}','['and']', determine if the input string is valid.The brackets must close in the correct ...
分类:其他好文   时间:2015-07-07 22:24:35    阅读次数:118
[leedcode 20] Valid Parentheses
Given a string containing just the characters'(',')','{','}','['and']', determine if the input string is valid.The brackets must close in the correct ...
分类:其他好文   时间:2015-07-07 18:48:56    阅读次数:99
leetCode 20.Valid Parentheses (有效的括号) 解题思路和方法
Valid Parentheses  Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. The brackets must close in the correct order, "()" and "()...
分类:其他好文   时间:2015-07-06 17:52:27    阅读次数:155
POJ 2955 Brackets (区间dp 括号匹配)
POJ 2955 Brackets (区间dp 括号匹配)...
分类:其他好文   时间:2015-07-06 01:29:04    阅读次数:241
poj 2955 Brackets dp简单题
//poj 2955 //sep9 #include using namespace std; char s[128]; int dp[128][128]; int n; int rec(int l,int r) { if(dp[l][r]!=-1) return dp[l][r]; if(l==r) return dp[l][r]=0; if(l+1==r){ if(s[l...
分类:其他好文   时间:2015-07-05 11:03:51    阅读次数:104
#leetcode#Valid Parentheses
Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. The brackets must close in the correct order, "()" and "()[]{}" are all va...
分类:其他好文   时间:2015-07-05 09:46:08    阅读次数:95
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