• A


    Jafar has n cans of cola. Each can is described by two integers: remaining volume of cola ai and can’s capacity bi (ai  ≤  bi).

    Jafar has decided to pour all remaining cola into just 2 cans, determine if he can do this or not!

    Input
    The first line of the input contains one integer n (2 ≤ n ≤ 100 000) — number of cola cans.

    The second line contains n space-separated integers a1, a2, …, an (0 ≤ ai ≤ 109) — volume of remaining cola in cans.

    The third line contains n space-separated integers that b1, b2, …, bn (ai ≤ bi ≤ 109) — capacities of the cans.

    Output
    Print “YES” (without quotes) if it is possible to pour all remaining cola in 2 cans. Otherwise print “NO” (without quotes).

    You can print each letter in any case (upper or lower).

    Examples
    Input
    2
    3 5
    3 6
    Output
    YES
    Input
    3
    6 8 9
    6 10 12
    Output
    NO
    Input
    5
    0 0 5 0 0
    1 1 8 10 5
    Output
    YES
    Input
    4
    4 1 0 3
    5 2 2 3
    Output
    YES
    Note
    In the first sample, there are already 2 cans, so the answer is “YES”.
    思路:大水题,模拟即可。只不过又忘记开long long了结果卡在第五组数据。

    #include <bits/stdc++.h>//第五组数据特别大,n是1e5,num_a[i]都是1e9,不知道为什么就是过不了这组
    #define ll long long//额,找到问题了,又忘记开long long 了。。。
    
    using namespace std;
    const int maxn = 1e5 + 5;
    
    int main()
    {
        ll n;
        ll num_a[maxn];
        ll num_b[maxn];
        scanf("%d",&n);
        ll sum = 0;
        for(int i = 0;i < n;i++)
        {
            scanf("%lld",&num_a[i]);
            sum += num_a[i];
        }
        for(int i = 0;i < n;i++)
        {
            scanf("%lld",&num_b[i]);
        }
        sort(num_b,num_b + n);
        int Max1 = num_b[n - 1];
        int Max2 = num_b[n - 2];
        if(sum <= Max1 + Max2)
        {
            printf("YES
    ");
        }
        else printf("NO
    ");
        return 0;
    }
    
    
    
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  • 原文地址:https://www.cnblogs.com/tomjobs/p/10617584.html
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