題中輸出時要求“......without trailing and leading spaces......”，否則會wrong answer.

1、學會getline的一種用法。

2、學會istringstream的用法。

3、熟悉c++中<iomanip>的格式輸出

//#define LOCAL  
#include<iostream>  
#include<iomanip>  
#include<string>  
#include<vector>  
#include<ctime>  
#include<sstream>  
#include<algorithm>  
using namespace std;  
vector<string> s[1005];  
int len[185];  
  
int main(){  
#ifdef LOCAL  
    freopen("in.txt", "r", stdin);  
    freopen("out.txt", "w", stdout);  
#endif  
    string line,buf;  
    int i = 0,j=0;  
    while (getline(cin, line)){  
        istringstream stream(line);  
        while (stream >> buf){  
            len[j] = max(len[j], (int)buf.length());  
            j++;  
            s[i].push_back(buf);  
        }  
        i++; j = 0;  
    }  
    cout << setiosflags(ios::left);  
    for (int k = 0; k < i; k++){  
        int l = 0;  
        for ( l; l < s[k].size()-1; l++){  
            cout << setw(len[l] + 1) << s[k][l];  
        }  
        cout << s[k][l]<< endl;                 //每行單詞最後一個單詞後面不應該有空格輸出  
    }  
    //printf("Time used=%.3f\n", (double)clock() / CLOCKS_PER_SEC);  
    return 0;  
}