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답안 #236253

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
236253 2020-05-31T20:12:54 Z rajarshi_basu Candies (JOI18_candies) C++14
8 / 100
 5000 ms 33636 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;
}

Compilation message

candies.cpp: In function 'int main()':
candies.cpp:65:12: warning: variable 'e' set but not used [-Wunused-but-set-variable]
   for(auto e: all){
            ^

Subtask #1
8.0 / 8.0

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

Subtask #2
0 / 92.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 768 KB Output is correct
2 Correct 18 ms 896 KB Output is correct
3 Correct 17 ms 768 KB Output is correct
4 Correct 17 ms 896 KB Output is correct
5 Correct 17 ms 768 KB Output is correct
6 Correct 18 ms 768 KB Output is correct
7 Correct 17 ms 768 KB Output is correct
8 Correct 17 ms 768 KB Output is correct
9 Correct 15 ms 768 KB Output is correct
10 Correct 15 ms 768 KB Output is correct
11 Correct 18 ms 768 KB Output is correct
12 Correct 17 ms 768 KB Output is correct
13 Correct 18 ms 896 KB Output is correct
14 Correct 17 ms 768 KB Output is correct
15 Correct 17 ms 896 KB Output is correct
16 Correct 17 ms 896 KB Output is correct
17 Correct 17 ms 768 KB Output is correct
18 Correct 17 ms 768 KB Output is correct
19 Correct 15 ms 768 KB Output is correct
20 Correct 15 ms 768 KB Output is correct
21 Execution timed out 5044 ms 33636 KB Time limit exceeded
22 Halted 0 ms 0 KB -