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  • Codeforces 706B Interesting drink 【二分】

    time limit per test
    2 seconds
    memory limit per test
    256 megabytes
    input
    standard input
    output
    standard output

    Vasiliy likes to rest after a hard work, so you may often meet him in some bar nearby. As all programmers do, he loves the famous drink "Beecola", which can be bought in n different shops in the city. It's known that the price of one bottle in the shop i is equal to xi coins.

    Vasiliy plans to buy his favorite drink for q consecutive days. He knows, that on the i-th day he will be able to spent mi coins. Now, for each of the days he want to know in how many different shops he can buy a bottle of "Beecola".

    Input

    The first line of the input contains a single integer n (1 ≤ n ≤ 100 000) — the number of shops in the city that sell Vasiliy's favourite drink.

    The second line contains n integers xi (1 ≤ xi ≤ 100 000) — prices of the bottles of the drink in the i-th shop.

    The third line contains a single integer q (1 ≤ q ≤ 100 000) — the number of days Vasiliy plans to buy the drink.

    Then follow q lines each containing one integer mi (1 ≤ mi ≤ 109) — the number of coins Vasiliy can spent on the i-th day.

    Output

    Print q integers. The i-th of them should be equal to the number of shops where Vasiliy will be able to buy a bottle of the drink on the i-th day.

    Example
    input
    5
    3 10 8 6 11
    4
    1
    10
    3
    11
    
    output
    0
    4
    1
    5
    
    Note

    On the first day, Vasiliy won't be able to buy a drink in any of the shops.

    On the second day, Vasiliy can buy a drink in the shops 123 and 4.

    On the third day, Vasiliy can buy a drink only in the shop number 1.

    Finally, on the last day Vasiliy can buy a drink in any shop.

    lower_bound(k)寻找  k <= ? 并返回 ,upper_bound(k)寻找 k < ? 并返回。

    #include <cmath>
    #include <cstdio>
    #include <set>
    #include <vector>
    #include <cstring>
    #include <iostream>
    #include <algorithm>
    //#define LOCAL
    #define space " "
    using namespace std;
    //typedef __int64 Int;
    //typedef long long Long;
    const int INF = 0x3f3f3f3f;
    const int MAXN = 100000 + 10;
    const double Pi = acos(-1.0);
    const double ESP = 1e-5;
    int main() {
        int n, ar[MAXN], m, a;
        while (scanf("%d", &n) != EOF) {
            for (int i = 0; i < n; i++) {
                scanf("%d", &ar[i]);
            }
            sort(ar, ar + n); scanf("%d", &m);
            for (int i = 0; i < m; i++) {
                scanf("%d", &a);
                int ans = upper_bound(ar, ar + n, a) - ar;
                printf("%d
    ", ans);
            }
        }
        return 0;
    }

     

     

    
    


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  • 原文地址:https://www.cnblogs.com/cniwoq/p/6770820.html
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