count_if, any_of, all_of

Lab C++ Intermediate 20 points

Read n integers. Print how many are even (count_if), whether any is negative (any_of) and whether all are below 100 (all_of).

Input

Line 1: n. Line 2: n integers.

Output

Three lines.

Example

Input

6
4 7 -2 10 99 3

Output

3
true
true

Sample input available Sample output available

Editor

C++

Hints

The lambda is a predicate: it returns true or false for each element.

Solution explanation

Named algorithms say what you're checking, which reads better than a loop.

Show solution

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

int main() {
    int n;
    cin >> n;
    vector<int> v(n);
    for (int &x : v) cin >> x;
    cout << count_if(v.begin(), v.end(), [](int x) { return x % 2 == 0; }) << "\n";
    cout << boolalpha << any_of(v.begin(), v.end(), [](int x) { return x < 0; }) << "\n";
    cout << all_of(v.begin(), v.end(), [](int x) { return x < 100; }) << "\n";
    return 0;
}

Output

Answer