学步园

http://poj.org/problem?id=2356

// File Name: poj2356.cpp
// Author: bo_jwolf
// Created Time: 2013年10月15日 星期二 11:18:14

#include<vector>
#include<list>
#include<map>
#include<set>
#include<deque>
#include<stack>
#include<bitset>
#include<algorithm>
#include<functional>
#include<numeric>
#include<utility>
#include<sstream>
#include<iostream>
#include<iomanip>
#include<cstdio>
#include<cmath>
#include<cstdlib>
#include<cstring>
#include<ctime>

using namespace std;
const int maxn = 10005;
int sum[ maxn ], num[ maxn ];
int visit[ maxn ];

int main(){
	int n;
	while( cin >> n ){
		memset( sum, 0, sizeof( sum ) );
		memset( visit, -1, sizeof( visit ) );
		sum[ 0 ] = 0;
		for( int i = 0; i < n; ++i )
			cin >> num[ i ];
	//	cout << "aaaaaaaaaaaaaaaaaaaaaa" << endl;
		for( int i = 0; i < n; ++i ){
			sum[ i + 1] = ( sum[ i ] + num[ i ] );
		//	cout << "bbbbbbbbbbbbbbbbbbbbb" << endl;
			if( sum[ i + 1] % n == 0 ){
				cout << i + 1<< endl;
				for( int j = 0; j <= i; ++j ){
					cout << num[ j ] << endl;
				}
			//	cout << "aaaaaaaaaaaaaaaaa" << endl;
				break;
			}
			{
				if( visit[ sum[ i + 1 ] % n ] != -1 ){
					cout <<  i - visit[ sum[ i + 1 ] % n ]<< endl;
					for( int j = visit[ sum[ i + 1 ] % n ] + 1; j <= i; ++j ){
						cout << num[ j ] << endl;
					}
					//cout << "ccccccccccccccccccccc" << endl;
					break;
					//cout << sum[ i + 1 ] % n << endl;
				}
			}
			visit[ sum[ i  + 1] % n ] = i;
		}
	}
return 0;
}