CF 2021-11-26

本文主要是介绍CF 2021-11-26，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！

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



int main() {
	int t, n, l, r, k,a;
	vector<int>v;
	cin >> t;
	while (t--) {
		cin >> n>>l>>r>>k;
		for (int i = 0; i < n; ++i) {
			cin >> a;
			if (a <= r && a >= l) {
				v.push_back(a);
			}
		}
		vector<int>::iterator it = v.begin();
		sort(v.begin(), v.end());
		int i = 0;
		while (i<v.size()&&k >= 0) {
			k -= v[i];
			++i;
		}
		if (k < 0)
			cout << i - 1 << endl;
		else
			cout << i << endl;
		v.clear();
	}
}

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

struct node {
	int num;
	long long  val;
}a;

bool cmp(node& a, node& b) {
	return a.val > b.val;
}
int main() {
	int t,n;
	vector<node>v;
	cin >> t;
	while (t--) {
		cin >> n;
		for (int i = 0; i < n; ++i) {
			cin >> a.val; a.num = i;
			v.push_back(a);
		}
		sort(v.begin(), v.end(), cmp);
		int* s = new int[n]; int j = 1, k = -1;
		long long sum = 0, z = 0;
		for (int i = 0; i < n; ++i) {
			if (i % 2 == 0)
				s[v[i].num] = j, j += 1,z++;
			else
				s[v[i].num] = k, k -= 1;
//这里！原本sum是longlong,v[i].val , z都是int，会造成算术溢出，结果错误！
			sum =sum+ v[i].val * z;
		}
		cout << sum*2 << endl; cout << 0 << " ";
		for (int i = 0; i < n; ++i)
			cout << s[i] << " ";
		cout << endl;
		v.clear();

	}

}

赛后一定补题，下周若没补题每人发个红包（逃

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