oj.uz

Submission #96223

# Submission time Handle Problem Language Result Execution time Memory
96223 2019-02-07T08:55:55 Z Retro3014 Schools (IZhO13_school) C++17
100 / 100
 160 ms 11232 KB 
#include <iostream>
#include <vector>
#include <algorithm>
#include <stdio.h>
#include <queue>

using namespace std;
typedef long long ll;
#define MAX_N 300000

int N, M, S;
struct ST{
	ST (int x, int y) : x(x), y(y) {}
	int x, y;
	bool operator <(const ST &a)const{
		if(x==a.x)	return y<a.y;
		return x>a.x;
	}
};
vector<ST> v;
priority_queue<ll> pq;
struct S2{
	S2 (ll x, int y) : x(x), y(y) {}
	ll x;
	int y;
	bool operator <(const S2 &a)const{
		if(a.x==x)	return y>a.y;
		return a.x<x;
	}
};
priority_queue<S2> pq2, pq3;
ll ans;


bool chk[MAX_N+1];

int main(){
	scanf("%d%d%d", &N, &M, &S);
	for(int i=0; i<N; i++){
		int a, b;
		scanf("%d%d", &a, &b);
		v.push_back({a, b});
	}sort(v.begin(), v.end());
	//for(int i=0; i<N; i++){
	//	cout<<v[i].x<<' '<<v[i].y<<endl;
	//}cout<<endl;
	ll sum = 0;
	for(int i=0; i<M; i++){
		sum+=v[i].x;
		pq.push((ll)(v[i].y-v[i].x));
	}
	ll sum2 = 0;
	for(int i=M; i<N; i++){
		if(S==0)	continue;
		if(pq2.size()<S){
			pq2.push({(ll)v[i].y, i});	sum2+=(ll)v[i].y;
			chk[i] = true;
		}
		else{
			if(pq2.top().x<v[i].y){
				sum2-=pq2.top().x; sum2+=(ll)v[i].y;
				chk[pq2.top().y] = false; chk[i] = true;
				pq2.pop(); pq2.push({v[i].y, i});
			}
		}
	}
	for(int i=0; i<=S; i++){
		ans = max(ans, sum+sum2);
		if(i==S)	continue;
		sum += (ll)v[M+i].x;
		pq.push((ll)(v[M+i].y-v[M+i].x));
		//cout<<'&'<<pq.top()<<endl;
		sum += pq.top(); pq.pop();
		if(chk[M+i]){
			sum2 -= (ll)v[M+i].y;
			pq3.push({(ll)v[M+i].y, M+i});
		}else{
			//cout<<'*'<<pq2.top().x<<endl;
			while(!pq2.empty() && !pq3.empty() && pq2.top().x==pq3.top().x && pq2.top().y==pq3.top().y)	{
				pq2.pop(); pq3.pop();
			}
			sum2 -= pq2.top().x;
			chk[pq2.top().y] = false;
			pq2.pop();
		}
	}
	printf("%lld", ans);
	return 0;
}

Compilation message

school.cpp: In function 'int main()':
school.cpp:55:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(pq2.size()<S){
      ~~~~~~~~~~^~
school.cpp:38:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d", &N, &M, &S);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~
school.cpp:41:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &a, &b);
   ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 380 KB Output is correct
6 Correct 2 ms 128 KB Output is correct
7 Correct 3 ms 504 KB Output is correct
8 Correct 3 ms 504 KB Output is correct
9 Correct 3 ms 504 KB Output is correct
10 Correct 4 ms 376 KB Output is correct
11 Correct 5 ms 504 KB Output is correct
12 Correct 4 ms 504 KB Output is correct
13 Correct 14 ms 1140 KB Output is correct
14 Correct 36 ms 1944 KB Output is correct
15 Correct 56 ms 2540 KB Output is correct
16 Correct 81 ms 11232 KB Output is correct
17 Correct 121 ms 6500 KB Output is correct
18 Correct 114 ms 6372 KB Output is correct
19 Correct 136 ms 6944 KB Output is correct
20 Correct 160 ms 7516 KB Output is correct