oj.uz

Submission #673266

# Submission time Handle Problem Language Result Execution time Memory
673266 2022-12-20T04:09:19 Z Cutebol Schools (IZhO13_school) C++17
95 / 100
 2000 ms 20508 KB 
#include <bits/stdc++.h>
 
using namespace std;
 
void fopn(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
#define Scaramouche ios_base::sync_with_stdio(0) ; cin.tie(0) ; cout.tie(0);
#define int long long
#define itn int
#define endl "\n"
#define ff first
#define ss second
   
const int N = 3e5 + 5 ;
const int mod = 1e9 + 7 ;
const int inf = 1e12 ;

int n , k , m , sum ;
int	pref[N] , suf[N] ;
int a[N] , b[N] ;
multiset <int> st ;

void solve(){
	
	cin >> n >> m >> k ;
	for ( int i = 0 ; i < n ; i ++ ) cin >> a[i] >> b[i] ;
	vector < pair <int , pair <int , int> > > vec ;
	for ( int i = 0 ; i < n ; i ++ )
		vec.push_back({a[i]-b[i],{a[i],b[i]}}) ;
	sort ( vec.rbegin() , vec.rend() ) ;
	for ( int i = 0 ; i < m ; i ++ ){
		st.insert(vec[i].ss.ff) ;
		sum += vec[i].ss.ff ;
	}
	pref[m-1] = sum ;
	for ( int i = m ; i < n ; i ++ ){
		if ( vec[i].ss.ff > *st.begin() ){
			sum -= *st.begin() ;
			st.erase(st.begin()) ;
			st.insert(vec[i].ss.ff) ;
			sum += vec[i].ss.ff ;
		}
		pref[i] = sum ;
	}
	st.clear() ;
	sum = 0 ;
	for ( int i = n - 1 ; i >= n - k ; i -- ){
		st.insert(vec[i].ss.ss) ;
		sum += vec[i].ss.ss ;
	}
	suf[n-k] = sum ;
	for ( int i = n - k - 1 ; i >= 0 ; i -- ){
		if ( vec[i].ss.ss > *st.begin() ){
			sum -= *st.begin() ;
			st.erase(st.begin()) ;
			st.insert(vec[i].ss.ss) ;
			sum += vec[i].ss.ss ;
		}
		suf[i] = sum ;
	}
	int ans = 0 ;
	for ( int i = m-1 ; i < n ; i ++ ) ans = max ( ans , pref[i]+suf[i+1] ) ;
	cout << ans << endl ;
//	for ( int i = 0 ; i < n ; i ++ ) cerr << vec[i].ff << ' ' << vec[i].ss.ff << ' ' << vec[i].ss.ss << endl ;
//	for ( int i = 0 ; i < n ; i ++ ) cerr << pref[i] << ' ' << suf[i] << endl ;
}
 
signed main(){
//  fopn("blocks") ;
    Scaramouche ;
    int t = 1 ;
//    	cin >> t ;
    while ( t -- ) solve() ; 
}

Compilation message

school.cpp: In function 'void fopn(std::string)':
school.cpp:5:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | void fopn(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
      |                        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
school.cpp:5:72: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | void fopn(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
      |                                                                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
95.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Execution timed out 2086 ms 340 KB Time limit exceeded
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 2 ms 660 KB Output is correct
8 Correct 2 ms 680 KB Output is correct
9 Correct 3 ms 660 KB Output is correct
10 Correct 2 ms 660 KB Output is correct
11 Correct 2 ms 660 KB Output is correct
12 Correct 2 ms 660 KB Output is correct
13 Correct 17 ms 3556 KB Output is correct
14 Correct 30 ms 5308 KB Output is correct
15 Correct 46 ms 9228 KB Output is correct
16 Correct 110 ms 16184 KB Output is correct
17 Correct 122 ms 15804 KB Output is correct
18 Correct 126 ms 16448 KB Output is correct
19 Correct 138 ms 17776 KB Output is correct
20 Correct 166 ms 20508 KB Output is correct