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  • hdu 4150 Powerful Incantation

    题目连接

    http://acm.hdu.edu.cn/showproblem.php?pid=4150

    Powerful Incantation

    Description

    Some dangerous Witches invaded the garden city! As a righteous magician, james0zan want to find the most powerful incantation so he can beat those dangerous witches easily.
    After consulted one hundred and eight thousand Magic Books, james0zan find a way to calculate the power of an incantation. There is a very short incantation called “magic index” which contains the magic power, and each incantation’s power can be calculated by the times the “magic index” appearance in the incantation. Notice that if two “magic index” overlapped, the power only should be calculated once. And we just want the incantation more powerful. That is to say, if the “magic index” is “aa”, the power of incantation “aaaa” is 2(“aa”+”aa”), not 1(“a”+”aa”+”a”) or 3.

    Input

    The first line is an integer t (t<=30), the number of test cases. Each of the next t lines contains two strings, represent the incantation (length<=10^6) and the “magic index” (length<=5). Every char in the incantation and the magic index is lowercase.

    Output

    For each test case you should output the power of the incantation.

    Sample Input

    3
    aaaa aa
    bsdjfassdiifo sd
    papapapapapapap ap

    Sample Output

    2
    2
    7

    由于模式串很短所以直接暴力即可。。

     1 #include<algorithm>
     2 #include<iostream>
     3 #include<cstdlib>
     4 #include<cstring>
     5 #include<cstdio>
     6 #include<vector>
     7 #include<map>
     8 using std::cin;
     9 using std::cout;
    10 using std::endl;
    11 using std::find;
    12 using std::sort;
    13 using std::map;
    14 using std::pair;
    15 using std::vector;
    16 using std::multimap;
    17 #define pb(e) push_back(e)
    18 #define sz(c) (int)(c).size()
    19 #define mp(a, b) make_pair(a, b)
    20 #define all(c) (c).begin(), (c).end()
    21 #define iter(c) decltype((c).begin())
    22 #define cls(arr,val) memset(arr,val,sizeof(arr))
    23 #define cpresent(c, e) (find(all(c), (e)) != (c).end())
    24 #define rep(i, n) for (int i = 0; i < (int)(n); i++)
    25 #define tr(c, i) for (iter(c) i = (c).begin(); i != (c).end(); ++i)
    26 const int N = 1000011;
    27 typedef unsigned long long ull;
    28 char text[N], pat[10];
    29 int main() {
    30 #ifdef LOCAL
    31     freopen("in.txt", "r", stdin);
    32     freopen("out.txt", "w+", stdout);
    33 #endif
    34     int t;
    35     scanf("%d", &t);
    36     while (t--) {
    37         scanf("%s %s", text, pat);
    38         char *p = text;
    39         int ans = 0, len = strlen(pat);
    40         while (p = strstr(p, pat)) {
    41             ans++;
    42             p += len;
    43         }
    44         printf("%d
    ", ans);
    45     }
    46     return 0;
    47 }
    View Code
    By: GadyPu 博客地址:http://www.cnblogs.com/GadyPu/ 转载请说明
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  • 原文地址:https://www.cnblogs.com/GadyPu/p/4624066.html
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