http://ac.jobdu.com/problem.php?id=1337
在混乱中写完了最后一个循环，要时刻警惕越界。。 还有就是indent还是不会用，直接把代码缩进搞乱了
1 #include <stdio.h>
2 #include <string.h>
3 #include <stdlib.h>
4 #include <stack>
5 using namespace std;
6 int N;
7 char str[1000002];
8 bool flags[1000002] = { false };
9
10 stack < int >S;
11 bool match(char a,char b)
12 {
13 if(a=='('&&b==')')
14 return true;
15 return false;
16 }
17 int main ()
18 {
19 while (scanf ("%d", &N) != EOF)
20 {
21 scanf ("%s", str);
22 while (!S.empty ())
23 S.pop ();
24 memset (flags, false, sizeof (flags));
25 S.push (0);
26 int i, j;
27 int len = strlen (str) - 1;
28 for (i = 1; i <= len; i++)
29 {
30 if (S.empty ())
31 S.push (i);
32 else if (match (str[S.top ()], str[i]))
33 {
34 flags[i] = true;
35 flags[S.top ()] = true;
36 S.pop ();
37 }
38 else
39 S.push (i);
40 }
41 int max_len = -1;
42 int num = 0;
43 i = j = 0;
44 while (j <= len)
45 {
46 while (j<=len&&!flags[j])
47 j++;
48 i = j;
49 while (j<=len&&flags[j])
50 j++;
51 if (j - i > max_len)
52 {
53 max_len = j - i ;
54 num = 1;
55 }
56 else if (j - i == max_len)
57 {
58 num++;
59 }
60 i = j + 1;
61 }
62 printf("%d %d\n",max_len,num);
63 }
64 }