Submission #1286491

#	Time	Username	Problem	Language	Result	Execution time	Memory
1286491		CrabCNH	Potatoes and fertilizers (LMIO19_bulves)	C++20	100 / 100	163 ms	16416 KiB

bulves

#include <bits/stdc++.h>

#define task   "htgdtctn"

#define int    long long
#define pii    pair <int, int>
#define fi     first
#define se     second
#define szf    sizeof
#define sz(s)  (int)((s).size())
#define all(v) (v).begin(), (v).end()

using namespace std;

template <class T> void minimize (T &t, T f) {if (t > f) t = f;}
template <class T> void maximize (T &t, T f) {if (t < f) t = f;}

const int maxN = 5e5 + 5;
const int inf = 1e18 + 7;
const int mod = 1e9 + 7;

// mt19937_64 rd (chrono :: steady_clock :: now ().time_since_epoch ().count ());
// int Rand (int l, int r) {return uniform_int_distribution <int> (l, r) (rd);}

pii a[maxN];
int b[maxN];

inline void Solve () {
    int n;
    cin >> n;
    for (int i = 1; i <= n; i ++) {
        cin >> a[i].fi >> a[i].se;
        b[i] = a[i].fi - a[i].se + b[i - 1];
    }
    int res = 0;
    priority_queue <int> pq;
    for (int i = 1; i < n; i ++) {
        if (b[i] < 0) {
            res += -b[i];
            b[i] = 0;
        }
        res += b[i];
        pq.push (b[i]);
        pq.push (b[i]);
        pq.pop ();
    }
    while (!pq.empty ()) {
        int val = pq.top ();
        pq.pop ();
        res -= min (val, b[n]);
    }
    cout << res;
    return;
}

signed main () {
    cin.tie (nullptr) -> sync_with_stdio (false);
    if (fopen (task".inp", "r")) {
        freopen (task".inp", "r", stdin);
        freopen (task".out", "w", stdout);
    }
    int t = 1;
    //cin >> t;
    while (t --) {
        Solve ();
    } 
    return 0;
}
// wake me up when September ends

Compilation message (stderr)

bulves.cpp: In function 'int main()':
bulves.cpp:59:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 |         freopen (task".inp", "r", stdin);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
bulves.cpp:60:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   60 |         freopen (task".out", "w", stdout);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 24 / 24
• Subtask 2: 10 / 10
• Subtask 3: 20 / 20
• Subtask 4: 10 / 10
• Subtask 5: 36 / 36