B - Brackets in Implications
Time Limit:2000MS Memory Limit:262144KB 64bit IO Format:%I64d
& %I64u
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Description
Implication is a function of two logical arguments,...
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其他好文 时间:
2015-07-12 17:31:39
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124
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] ...
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其他好文 时间:
2015-07-12 17:30:25
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101
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...
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其他好文 时间:
2015-07-11 01:06:18
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177
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...
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编程语言 时间:
2015-07-10 15:29:38
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98
Given a string containing just the characters'(',')','{','}','['and']', determine if the input string is valid.The brackets must close in the correct ...
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其他好文 时间:
2015-07-07 22:24:35
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118
Given a string containing just the characters'(',')','{','}','['and']', determine if the input string is valid.The brackets must close in the correct ...
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其他好文 时间:
2015-07-07 18:48:56
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99
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 "()...
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其他好文 时间:
2015-07-06 17:52:27
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155
POJ 2955 Brackets (区间dp 括号匹配)...
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其他好文 时间:
2015-07-06 01:29:04
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241
//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...
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其他好文 时间:
2015-07-05 11:03:51
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104
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...
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其他好文 时间:
2015-07-05 09:46:08
阅读次数:
95