URAL 1723. Sandro's Book

1723. Sandro's Book

Time limit: 0.5 second

Memory limit: 64 MB

It's been quite a number of years since Lich Sandro retired. Sometimes in the evenings, when he feels especially lonely, he takes a book that was presented to him by his student magicians on the occasion
of his retirement.

This evening the great magician is also reading the book. One of the chapters describes Sandro's famous discovery: he invented a universal spell many years ago. Any substring (a few consecutive symbols
of the string) of the universal spell is also a spell, and its power is equal to the number of times this spell is encountered in the universal spell (for example, the string “ue” encounters in the string “queue” twice, and the string “aba” encounters in the
string “abababa” three times).

Sandro has a lot of free time now and he wants to find the most powerful spell. Help Sandro do it.

Input

The only input line contains the universal spell invented by Sandro. The spell is a non-empty string consisting of lowercase English letters with length at most 50.

Output

Output any of the most powerful spells, according to Sandro's definition.

Sample

input	output
tebidohtebidoh	tebidoh

题意：求字符串中出现字数最多的子串。
解析：题意描述的不清楚，没有讲可以输出任意一个。。。其实只需要找出现最多的字符就行了。

AC代码：

#include <cstdio>
#include <string>
#include <iostream>
#include <cstring>
using namespace std;

int c[128];

int main(){
    #ifdef sxk
        freopen("in.txt", "r", stdin);
    #endif //sxk

    string s;
    while(cin>>s){
        memset(c, 0, sizeof(c));
        int len = s.size(), foo = 0;
        for(int i=0; i<len; i++){
            c[ s[i] ] ++;
            if(c[s[foo]] < c[s[i]]){
                foo = i;
            }
        }
        cout<<s[foo]<<endl;
    }
    return 0;
}