Submission #973139

#	Time	Username	Problem	Language	Result	Execution time	Memory
973139		hihihah	Potatoes and fertilizers (LMIO19_bulves)	C++14	100 / 100	145 ms	20928 KiB

bulves

#include<bits/stdc++.h>

using namespace std;

#define ll long long
#define all(x) x.begin(), x.end()
#define pii pair<int, int>

int n;
int a[500009];
int b[500009];
int64_t pre[500009];

void hihihah()
{
    cin >> n;
    for(int i = 1; i <= n; i ++)
        cin >> a[i] >> b[i];

    for(int i = 1; i <= n; i ++)
    {
        pre[i] = pre[i - 1] + a[i] - b[i];
    }

    priority_queue<int64_t> p;

    int64_t ans = 0;
    p.push(0);

    for(int i = 1; i <= n; i ++)
    {
        if(pre[i] < 0)
        {
            ans += -pre[i];
            pre[i] = 0;
        }
        if(p.top() > pre[i]) ans += p.top() - pre[i];
        p.push(pre[i]);
        p.push(pre[i]);
        p.pop();
    }

    while(p.top() > pre[n])
    {
        ans += p.top() - pre[n];
        p.pop();
    }

    cout << ans;
}

int32_t main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);

    #define orz "mo"
    if(fopen(orz".inp", "r"))
    {
        freopen(orz".inp", "r", stdin);
//        freopen(orz".out", "w", stdout);
    }

    int t = 1;
//    cin >> t;
    while(t --)
    {
        hihihah();
    }
    return 0;
}

Compilation message (stderr)

bulves.cpp: In function 'int32_t main()':
bulves.cpp:60:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   60 |         freopen(orz".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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