Submission #1265036

#	Time	Username	Problem	Language	Result	Execution time	Memory
1265036		icebear	Candies (JOI18_candies)	C++20	100 / 100	62 ms	8332 KiB

candies

// ~~ icebear ~~
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> ii;
typedef pair<int, ii> iii;

template<class T>
    bool minimize(T &a, const T &b) {
        if (a > b) return a = b, true;
        return false;
    }

template<class T>
    bool maximize(T &a, const T &b) {
        if (a < b) return a = b, true;
        return false;
    }

#define FOR(i,a,b) for(int i=(a); i<=(b); ++i)
#define FORR(i,a,b) for(int i=(a); i>=(b); --i)
#define REP(i, n) for(int i=0; i<(n); ++i)
#define RED(i, n) for(int i=(n)-1; i>=0; --i)
#define MASK(i) (1LL << (i))
#define BIT(S, i) (((S) >> (i)) & 1)
#define mp make_pair
#define pb push_back
#define fi first
#define se second
#define all(x) x.begin(), x.end()
#define task "icebear"

const int MOD = 1e9 + 7;
const int inf = 1e9 + 27092008;
const ll INF = 1e18 + 27092008;
const int N = 2e5 + 5;
int n, l[N], r[N];
priority_queue<pair<ll, int>> Q;
ll a[N];

void init(void) {
    cin >> n;
    a[0] = a[n + 1] = -INF;
    FOR(i, 1, n) {
        cin >> a[i];
        l[i] = i - 1;
        r[i] = i + 1;
        Q.push(mp(a[i], i));
    }
}

void process(void) {
    ll ans = 0;
    vector<bool> choose(n + 5, false);
    FOR(j, 1, (n + 1) / 2) {
        while(!Q.empty() && choose[Q.top().se]) Q.pop();
        int i = Q.top().se; Q.pop();
        ans += a[i];
        cout << ans << '\n';

        a[i] = a[l[i]] + a[r[i]] - a[i];
        choose[l[i]] = choose[r[i]] = true;
        Q.push(mp(a[i], i));

        l[i] = l[l[i]];
        r[l[i]] = i;

        r[i] = r[r[i]];
        l[r[i]] = i;
    }
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    if (fopen(task".inp", "r")) {
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }
    int tc = 1;
//     cin >> tc;
    while(tc--) {
        init();
        process();
    }
    return 0;
}

Compilation message (stderr)

candies.cpp: In function 'int main()':
candies.cpp:78:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   78 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
candies.cpp:79:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   79 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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