Submission #963736

#	Time	Username	Problem	Language	Result	Execution time	Memory
963736		Cookie	Candies (JOI18_candies)	C++14	0 / 100	2 ms	6492 KiB

candies

#include<bits/stdc++.h>
#include<fstream>
using namespace std;
#define sz(a) (int)a.size()
#define ALL(v) v.begin(), v.end()
#define ALLR(v) v.rbegin(), v.rend()
#define ll long long
#define pb push_back
#define forr(i, a, b) for(int i = a; i < b; i++)
#define dorr(i, a, b) for(int i = a; i >= b; i--)
#define ld long double
#define vt vector
#include<fstream>
#define fi first
#define se second
#define pll pair<ll, ll>
#define pii pair<int, int>
#define mpp make_pair
const ld PI = 3.14159265359, prec = 1e-9;;
//using u128 = __uint128_t;
//const int x[4] = {1, 0, -1, 0};
//const int y[4] = {0, -1, 0, 1};
const ll mod = 1e9 + 7, pr = 31;
const int mxn = 5e5 + 5, mxq = 1e5 + 5, sq = 500, mxv = 5e4 + 1;
//const int base = (1 <<18);
const ll inf = 1e9 + 5, neg = -69420, inf2 = 1e14;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
// have fun!
//JOIIIIIIIIIIIIIII
struct ch{
    ll v, l, r;
};
struct cmp{
    bool operator ()(const ch &a, const ch &b){
        return(a.v < b.v);
    }
};
int n;
ll a[mxn + 1];
int nxt[mxn + 1], last[mxn + 1];
bool vis[mxn + 1];
void solve(){
    cin >> n;
    priority_queue<ch, vt<ch>, cmp>pq;
    for(int i = 1; i <= n; i++){
        cin >> a[i]; last[i] = i - 1; nxt[i] = i + 1; pq.push({a[i], i, i + 1});
    }
    int take = 0;
    ll ans = 0;
    while(!pq.empty()){
        auto [val, l, r] = pq.top(); pq.pop();
        if(vis[l] || vis[r])continue;
        ans += val; take++;
        cout << ans << "\n";
        if(take == (n + 1) / 2)break;
        vis[l] = vis[r] = 1;
        int u = last[l], v = nxt[r];
        
        if(u >= 1 && v <= n + 1){
            nxt[u] = v; last[v] = u; a[u] += a[r] - a[l];
            pq.push({a[u], u, v});
        }
    }
    
}
signed main(){
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    //freopen("DATA.inp", "r", stdin);
    //freopen("DATA.out", "w", stdout);
    int tt; tt = 1;
    while(tt--){
        solve();
 
    }
    return(0);
}

Compilation message (stderr)

candies.cpp: In function 'void solve()':
candies.cpp:51:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   51 |         auto [val, l, r] = pq.top(); pq.pop();
      |              ^

• Subtask 1: 0 / 8
• Subtask 2: 0 / 92