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답안 #236254

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
236254 2020-05-31T20:13:58 Z rajarshi_basu Candies (JOI18_candies) C++14
100 / 100
 529 ms 35760 KB 
#include <stdio.h>     
#include <stdlib.h>    
#include <iostream>
#include <vector>
#include <algorithm>
#include <fstream>
#include <queue>
#include <deque>
#include <iomanip>
#include <cmath>
#include <set>
#include <stack>
#include <map>
#include <unordered_map>
 
#define FOR(i,n) for(int i=0;i<n;i++)
#define FORE(i,a,b) for(int i=a;i<=b;i++)
#define ll long long 
#define ld long double
//#define int short
#define vi vector<int>
#define pb push_back
#define ff first
#define ss second
#define ii pair<int,int>
#define iii pair<ll,ii>
#define pll pair<ll,ll>
#define plll pair<ll,pll>
//#define mp make_pair
#define vv vector
#define endl '\n'
 
using namespace std;

const ll INF = 1e18;
const int MAXN = 3*100*1000;
 
int main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
 
	int n;
	cin >> n;
	int arr[n];
	FOR(i,n)cin >> arr[i];
 
	set<iii, greater<iii> > all;
	unordered_map<int,ll> values;
	values.reserve(1024);
    values.max_load_factor(0.25);

	int beforeLink[n];
	int afterLink[n];
	FOR(i,n){
		beforeLink[i] = i-1;
		afterLink[i]=i+1;
		values[i*MAXN+i+1] = arr[i];
		all.insert({arr[i],{i,i+1}});
	}
	ll cost = 0;
	FOR(i,(n+1)/2){
		iii item = *(all.begin());
		//cout << " =========== " << endl;
		/*for(auto e: all){
			//cout << e.ff << "   : " << e.ss.ff << " " << e.ss.ss << endl; 
		}*/ 

		cost += item.ff;
		all.erase(item);

		if(item.ss.ff > 0){
			ll acost = values[beforeLink[item.ss.ff]*MAXN+item.ss.ff];
			all.erase({acost,{beforeLink[item.ss.ff],item.ss.ff}});
		}else{
			ll bcost = values[item.ss.ss*MAXN+ afterLink[item.ss.ss]];
			all.erase({bcost,{item.ss.ss,afterLink[item.ss.ss]}});
			beforeLink[afterLink[item.ss.ss]] = item.ss.ff;
			afterLink[item.ss.ff] = afterLink[item.ss.ss];

			iii nc = {-INF, {item.ss.ff,afterLink[item.ss.ss]}};
			values[nc.ss.ff*MAXN+nc.ss.ss] = nc.ff;
			all.insert(nc);
			cout << cost << endl;
			continue;
		}
		if(item.ss.ss < n){
			ll bcost = values[item.ss.ss*MAXN+afterLink[item.ss.ss]];
			all.erase({bcost,{item.ss.ss,afterLink[item.ss.ss]}});
		}else{
			ll acost = values[beforeLink[item.ss.ff]*MAXN+item.ss.ff];
			all.erase({acost,{beforeLink[item.ss.ff],item.ss.ff}});
			beforeLink[item.ss.ss] = beforeLink[item.ss.ff];
			afterLink[beforeLink[item.ss.ff]] = item.ss.ss;

			iii nc = {-INF, {beforeLink[item.ss.ff],item.ss.ss}};
			values[nc.ss.ff*MAXN+nc.ss.ss] = nc.ff;
			all.insert(nc);
			cout << cost << endl;
			continue;
		}

		if(item.ss.ff > 0 and item.ss.ss < n){
			ll acost = values[beforeLink[item.ss.ff]*MAXN+item.ss.ff];
			ll bcost = values[item.ss.ss*MAXN+afterLink[item.ss.ss]];
			beforeLink[afterLink[item.ss.ss]] = beforeLink[item.ss.ff];
			afterLink[beforeLink[item.ss.ff]] = afterLink[item.ss.ss];

			iii nc = {acost + bcost - item.ff, {beforeLink[item.ss.ff],afterLink[item.ss.ss]}};
			values[nc.ss.ff*MAXN+nc.ss.ss] = nc.ff;
			all.insert(nc);
		}
		cout << cost << endl;
	}
 
	return 0;
}

Subtask #1
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 768 KB Output is correct
2 Correct 6 ms 768 KB Output is correct
3 Correct 8 ms 768 KB Output is correct
4 Correct 6 ms 768 KB Output is correct
5 Correct 6 ms 896 KB Output is correct
6 Correct 6 ms 768 KB Output is correct
7 Correct 7 ms 768 KB Output is correct
8 Correct 6 ms 768 KB Output is correct
9 Correct 6 ms 768 KB Output is correct
10 Correct 6 ms 768 KB Output is correct
11 Correct 6 ms 768 KB Output is correct
12 Correct 6 ms 768 KB Output is correct
13 Correct 6 ms 896 KB Output is correct
14 Correct 7 ms 768 KB Output is correct
15 Correct 7 ms 768 KB Output is correct
16 Correct 6 ms 896 KB Output is correct
17 Correct 6 ms 768 KB Output is correct
18 Correct 6 ms 768 KB Output is correct
19 Correct 6 ms 768 KB Output is correct
20 Correct 6 ms 768 KB Output is correct

Subtask #2
92.0 / 92.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 768 KB Output is correct
2 Correct 6 ms 768 KB Output is correct
3 Correct 8 ms 768 KB Output is correct
4 Correct 6 ms 768 KB Output is correct
5 Correct 6 ms 896 KB Output is correct
6 Correct 6 ms 768 KB Output is correct
7 Correct 7 ms 768 KB Output is correct
8 Correct 6 ms 768 KB Output is correct
9 Correct 6 ms 768 KB Output is correct
10 Correct 6 ms 768 KB Output is correct
11 Correct 6 ms 768 KB Output is correct
12 Correct 6 ms 768 KB Output is correct
13 Correct 6 ms 896 KB Output is correct
14 Correct 7 ms 768 KB Output is correct
15 Correct 7 ms 768 KB Output is correct
16 Correct 6 ms 896 KB Output is correct
17 Correct 6 ms 768 KB Output is correct
18 Correct 6 ms 768 KB Output is correct
19 Correct 6 ms 768 KB Output is correct
20 Correct 6 ms 768 KB Output is correct
21 Correct 518 ms 33904 KB Output is correct
22 Correct 508 ms 35532 KB Output is correct
23 Correct 515 ms 35760 KB Output is correct
24 Correct 258 ms 35408 KB Output is correct
25 Correct 257 ms 35404 KB Output is correct
26 Correct 258 ms 35316 KB Output is correct
27 Correct 281 ms 35664 KB Output is correct
28 Correct 278 ms 35576 KB Output is correct
29 Correct 284 ms 35660 KB Output is correct
30 Correct 293 ms 35532 KB Output is correct
31 Correct 306 ms 35532 KB Output is correct
32 Correct 294 ms 35532 KB Output is correct
33 Correct 392 ms 35276 KB Output is correct
34 Correct 387 ms 35276 KB Output is correct
35 Correct 393 ms 35500 KB Output is correct
36 Correct 501 ms 35532 KB Output is correct
37 Correct 515 ms 35532 KB Output is correct
38 Correct 529 ms 35544 KB Output is correct
39 Correct 258 ms 35312 KB Output is correct
40 Correct 264 ms 35408 KB Output is correct
41 Correct 262 ms 35316 KB Output is correct
42 Correct 280 ms 35532 KB Output is correct
43 Correct 282 ms 35532 KB Output is correct
44 Correct 285 ms 35532 KB Output is correct
45 Correct 300 ms 35740 KB Output is correct
46 Correct 296 ms 35532 KB Output is correct
47 Correct 315 ms 35568 KB Output is correct
48 Correct 381 ms 35276 KB Output is correct
49 Correct 394 ms 35444 KB Output is correct
50 Correct 396 ms 35192 KB Output is correct