Submission #973110

#	Time	Username	Problem	Language	Result	Execution time	Memory
973110		hihihah	Potatoes and fertilizers (LMIO19_bulves)	C++14	34 / 100	134 ms	262144 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];
    }

    vector<vector<int64_t>> dp(n + 3, vector<int64_t>(pre[n] + 3, 0));

    for(int i = 1; i <= n; i ++)
    {
        for(int j = 0; j <= pre[n]; j ++)
        {
            dp[i][j] = dp[i - 1][j] + abs(j - pre[i]);
            if(j > 0)
                dp[i][j] = min(dp[i][j - 1], dp[i][j]);
        }
    }

    cout << dp[n][pre[n]];
}

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:48:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |         freopen(orz".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 24 / 24
• Subtask 2: 10 / 10
• Subtask 3: 0 / 20
• Subtask 4: 0 / 10
• Subtask 5: 0 / 36