CF#248DIV2:A. Kitahara Haruki's Gift_html/css_WEB-ITnose
Kitahara Haruki has bought n apples for Touma Kazusa and Ogiso Setsuna. Now he wants to divide all the apples between the friends.
Each apple weights 100 grams or 200 grams. Of course Kitahara Haruki doesn't want to offend any of his friend. Therefore the total weight of the apples given to Touma Kazusa must be equal to the total weight of the apples given to Ogiso Setsuna.
But unfortunately Kitahara Haruki doesn't have a knife right now, so he cannot split any apple into some parts. Please, tell him: is it possible to divide all the apples in a fair way between his friends?
Input
The first line contains an integer n (1?≤?n?≤?100) ? the number of apples. The second line contains n integers w1,?w2,?...,?wn (wi?=?100or wi?=?200), where wi is the weight of the i-th apple.
Output
In a single line print "YES" (without the quotes) if it is possible to divide all the apples between his friends. Otherwise print "NO" (without the quotes).
Sample test(s)
input
3100 200 100
output
YES
input
4100 100 100 200
output
NO
Note
In the first test sample Kitahara Haruki can give the first and the last apple to Ogiso Setsuna and the middle apple to Touma Kazusa.
好久没做CF了,这次又是打了个酱油
#include <stdio.h>#include <string.h>#include <math.h>#include <algorithm>using namespace std;int a[105];int main(){ int n,i,sum1,sum2,sum; while(~scanf("%d",&n)) { sum1 = sum2 = sum = 0; for(i = 0; i<n i scanf sum if sum1 else sum2 printf continue sort return> <br> <br> <p></p> </n></algorithm></math.h></string.h></stdio.h>

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