oj.uz

Submission #236252

# Submission time Handle Problem Language Result Execution time Memory
236252 2020-05-31T20:05:06 Z rajarshi_basu Candies (JOI18_candies) C++14
8 / 100
 5000 ms 29736 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;
 
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;
	map<ii,ll> values;


	int beforeLink[n];
	int afterLink[n];
	FOR(i,n){
		beforeLink[i] = i-1;
		afterLink[i]=i+1;
		values[{i,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],item.ss.ff}];
			all.erase({acost,{beforeLink[item.ss.ff],item.ss.ff}});
		}else{
			ll bcost = values[{item.ss.ss,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] = nc.ff;
			all.insert(nc);
			cout << cost << endl;
			continue;
		}
		if(item.ss.ss < n){
			ll bcost = values[{item.ss.ss,afterLink[item.ss.ss]}];
			all.erase({bcost,{item.ss.ss,afterLink[item.ss.ss]}});
		}else{
			ll acost = values[{beforeLink[item.ss.ff],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] = 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],item.ss.ff}];
			ll bcost = values[{item.ss.ss,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] = nc.ff;
			all.insert(nc);
		}
		cout << cost << endl;
	}
 
	return 0;
}

Compilation message

candies.cpp: In function 'int main()':
candies.cpp:63:12: warning: variable 'e' set but not used [-Wunused-but-set-variable]
   for(auto e: all){
            ^

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 640 KB Output is correct
2 Correct 18 ms 640 KB Output is correct
3 Correct 17 ms 640 KB Output is correct
4 Correct 18 ms 640 KB Output is correct
5 Correct 18 ms 640 KB Output is correct
6 Correct 18 ms 640 KB Output is correct
7 Correct 18 ms 640 KB Output is correct
8 Correct 18 ms 640 KB Output is correct
9 Correct 16 ms 768 KB Output is correct
10 Correct 15 ms 640 KB Output is correct
11 Correct 18 ms 640 KB Output is correct
12 Correct 18 ms 640 KB Output is correct
13 Correct 18 ms 640 KB Output is correct
14 Correct 18 ms 640 KB Output is correct
15 Correct 18 ms 640 KB Output is correct
16 Correct 18 ms 640 KB Output is correct
17 Correct 18 ms 640 KB Output is correct
18 Correct 18 ms 640 KB Output is correct
19 Correct 15 ms 640 KB Output is correct
20 Correct 15 ms 768 KB Output is correct

Subtask #2
0 / 92.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 640 KB Output is correct
2 Correct 18 ms 640 KB Output is correct
3 Correct 17 ms 640 KB Output is correct
4 Correct 18 ms 640 KB Output is correct
5 Correct 18 ms 640 KB Output is correct
6 Correct 18 ms 640 KB Output is correct
7 Correct 18 ms 640 KB Output is correct
8 Correct 18 ms 640 KB Output is correct
9 Correct 16 ms 768 KB Output is correct
10 Correct 15 ms 640 KB Output is correct
11 Correct 18 ms 640 KB Output is correct
12 Correct 18 ms 640 KB Output is correct
13 Correct 18 ms 640 KB Output is correct
14 Correct 18 ms 640 KB Output is correct
15 Correct 18 ms 640 KB Output is correct
16 Correct 18 ms 640 KB Output is correct
17 Correct 18 ms 640 KB Output is correct
18 Correct 18 ms 640 KB Output is correct
19 Correct 15 ms 640 KB Output is correct
20 Correct 15 ms 768 KB Output is correct
21 Execution timed out 5055 ms 29736 KB Time limit exceeded
22 Halted 0 ms 0 KB -