oj.uz

Submission #1029129

# Submission time Handle Problem Language Result Execution time Memory
1029129 2024-07-20T12:52:05 Z vjudge1 Schools (IZhO13_school) C++17
100 / 100
 150 ms 21020 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp> 
 
#pragma GCC target("avx,avx2,fma")
#pragma GCC optimize("Ofast,unroll-loops")
 
using namespace std;
using namespace __gnu_pbds;
 
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define f first
#define s second
#define int long long
#define pii pair<int,int>
#define ar array
 
template<class T>bool umax(T &a,T b){if(a<b){a=b;return true;}return false;}
template<class T>bool umin(T &a,T b){if(b<a){a=b;return true;}return false;}
 
typedef tree<int, null_type, less_equal<int>, rb_tree_tag,
 tree_order_statistics_node_update> ordered_set;
 
const int inf = 1e17 + 7;
const int mod = 1e9 + 7;
const int N = 3e5 + 5;
const int md = 998244353;

int binpow(int a, int b){
	if(b == 0)return 1;
	if(b % 2 == 0){
		int c = binpow(a,b/2);
		return (c*c)%mod;
	}
	return (binpow(a,b-1)*a)%mod;
}

int divi(int a, int b){
	return (a*(binpow(b,mod-2)))%mod;
}

int n,m,k;
int dp[N][2];

void solve(){
	
	cin >> n >> m >> k;
	
	vector<pair<int,pii>>v(n);
	for(int i = 0;i<n;i++){
		int a,b;
		cin >> a >> b;
		v[i] = {a-b,{a,b}};
	}
	
	sort(rall(v));
	
	int sum = 0;
	multiset <int> st;
	
	for(int i = 0;i<n;i++){
		st.insert(v[i].s.f);
		sum += v[i].s.f;
		if(st.size() > m){
			sum -= *st.begin();
			st.erase(st.begin());
		}
		dp[i+1][0] = sum;
	}
	
	sum = 0;
	st.clear();
	for(int i = n-1;i>=0;i--){
		st.insert(v[i].s.s);
		sum += v[i].s.s;
		if(st.size() > k){
			sum -= *st.begin();
			st.erase(st.begin());
		}
		dp[i+1][1] = sum;
	}
	int ans = 0;
	
	for(int i = m;i<= n - k;i++){
		umax(ans, dp[i][0] + dp[i+1][1]);
	}
	
	cout << ans << "\n";
	
	
	
}
/*
2
2
2 1
4
2 3 1 4

 */
 signed main()
{
//	freopen("seq.in", "r", stdin);
//  freopen("seq.out", "w", stdout);
	ios_base::sync_with_stdio(0);cin.tie(NULL);cout.tie(NULL);
	int tt=1;//cin>>tt;
	while(tt--)solve();
 
}

Compilation message

school.cpp: In function 'void solve()':
school.cpp:65:16: warning: comparison of integer expressions of different signedness: 'std::multiset<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   65 |   if(st.size() > m){
      |      ~~~~~~~~~~^~~
school.cpp:77:16: warning: comparison of integer expressions of different signedness: 'std::multiset<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   77 |   if(st.size() > k){
      |      ~~~~~~~~~~^~~

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 432 KB Output is correct
7 Correct 2 ms 728 KB Output is correct
8 Correct 3 ms 860 KB Output is correct
9 Correct 2 ms 860 KB Output is correct
10 Correct 2 ms 856 KB Output is correct
11 Correct 4 ms 856 KB Output is correct
12 Correct 2 ms 860 KB Output is correct
13 Correct 20 ms 4900 KB Output is correct
14 Correct 42 ms 4316 KB Output is correct
15 Correct 40 ms 6880 KB Output is correct
16 Correct 96 ms 14676 KB Output is correct
17 Correct 109 ms 15572 KB Output is correct
18 Correct 107 ms 15344 KB Output is correct
19 Correct 138 ms 17828 KB Output is correct
20 Correct 150 ms 21020 KB Output is correct