Submission #42993

#	Time	Username	Problem	Language	Result	Execution time	Memory
42993		MatheusLealV	Schools (IZhO13_school)	C++14	0 / 100	3 ms	2788 KiB

school

#include <bits/stdc++.h>
#define N 300005
#define f first
#define s second
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pii;

ll used[N], n, m, s;

pair<pii, ll> v[N];

bool cmp4(pair<pii, ll> a, pair<pii, ll> b){
	return a.f.f > b.f.f;
}

bool cmp3(pair<pii, ll> a, pair<pii, ll> b){
	return a.f.s > b.f.s;
}

bool cmp2(pair<pii, ll> a, pair<pii, ll> b){
	return a.f.s - a.f.f > b.f.s - b.f.f;
}

bool cmp(pair<pii, ll> a, pair<pii, ll> b){
	return a.f.f - a.f.s > b.f.f - b.f.s;
}

ll solve1()
{
	ll ans = 0;

	sort(v + 1, v + n + 1, cmp);

	for(int i = 1; i <= m; i++) ans += v[i].f.f, used[v[i].s] = 1;

	sort(v + 1, v + n + 1, cmp3);

	for(int i = 1, cnt = 1; i <= n && cnt <= s; i++) if(!used[v[i].s]) cnt ++, ans += v[i].f.s;

	return ans;
}

ll solve2()
{
	ll ans = 0;

	memset(used, 0, sizeof used);

	sort(v + 1, v + n + 1, cmp2);

	for(int i = 1; i <= s; i++) ans += v[i].f.s, used[v[i].s] = 1;

	sort(v + 1, v + n + 1, cmp4);

	for(int i = 1, cnt = 1; i <= n && cnt <= m; i++) if(!used[v[i].s]) cnt ++, ans += v[i].f.f;

	return ans;
}

int main()
{
	ios::sync_with_stdio(false); cin.tie(0);

	cin>>n>>m>>s;

	for(int i = 1; i <= n; i++) cin>>v[i].f.f>>v[i].f.s, v[i].s = i;

	cout<<max(solve1(), solve2())<<"\n";
}

• Subtask 1: 0 / 100