oj.uz

Submission #713684

# Submission time Handle Problem Language Result Execution time Memory
713684 2023-03-22T19:57:15 Z mtxas Potatoes and fertilizers (LMIO19_bulves) C++14
24 / 100
 106 ms 8160 KB 
#include <bits/stdc++.h>
#pragma GCC optimize("O3")
#define int long long
#define DISABLE_PRINTF
#ifdef DISABLE_PRINTF
#define printf(...)
#endif // DISABLE_PRINTF
using namespace std;
void solve()
{
    int n;
    cin >> n;
    vector<int> a(n + 1), b(n + 1);
    for(int i = 1; i <= n; ++i)
    {
        cin >> a[i] >> b[i];
    }
    int A = 0;
    int B = 0;
    for(int i = 1; i <= n; ++i)
    {
        A += a[i], B += b[i];
    }
    if(A == B)
    {
        /// solve it
        int ans = 0;
        int aid = 1, bid = 1;
        for(; bid <= n; ++bid)
        {
            for(; b[bid] > 0; ++aid)
            {
                int take = min(a[aid], b[bid]);
                b[bid] -= take;
                a[aid] -= take;
                ans += take * abs(bid - aid);
                if(b[bid] == 0)
                {
                    break;
                }
            }
        }
        cout << ans;
    }
    else if(A == B + 1)
    {
        vector<int> pref(n + 1), suff(n + 2);
        vector<int> acopy = a, bcopy = b;
        /// calc pref
        int bid = 1;
        for(int i = 1; i <= n; ++i)
        {
            pref[i] = pref[i - 1];
            for(; a[i] > 0; bid += (b[bid] == 0) )
            {
                if(bid == n+1) break;
                int take = min(a[i], b[bid]);
                a[i] -= take;
                b[bid] -= take;
                pref[i] += abs(i - bid) * take;
            }
        }
        a = acopy;
        b = bcopy;
        /// calc suff
        for(int i = n; i >= 1; --i)
        {
            suff[i] = suff[i + 1];
            for(; a[i] > 0; bid -= (b[bid] == 0) )
            {
                if(bid == 0) break;
                int take = min(a[i], b[bid]);
                a[i] -= take;
                b[bid] -= take;
                suff[i] += abs(i - bid) * take;
            }
        }
        int ans = suff[1];
        for(int i = 1; i <= n; ++i)
        {
            ans = min(ans, pref[i] + suff[i + 1]);
        }
        cout << ans << '\n';
    }
}
signed main()
{
#ifdef EVAL
    cin.tie(0);
    cout.tie(0);
    ios_base::sync_with_stdio(false);
#else
    freopen("input_00.txt", "r", stdin);
#endif // EVAL

    solve();
}

Subtask #1
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 7 ms 1108 KB Output is correct
5 Correct 13 ms 1876 KB Output is correct
6 Correct 40 ms 4300 KB Output is correct
7 Correct 106 ms 8148 KB Output is correct
8 Correct 70 ms 8160 KB Output is correct
9 Correct 66 ms 8148 KB Output is correct
10 Correct 49 ms 8148 KB Output is correct
11 Correct 47 ms 8148 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 7 ms 1108 KB Output is correct
5 Correct 13 ms 1876 KB Output is correct
6 Correct 40 ms 4300 KB Output is correct
7 Correct 106 ms 8148 KB Output is correct
8 Correct 70 ms 8160 KB Output is correct
9 Correct 66 ms 8148 KB Output is correct
10 Correct 49 ms 8148 KB Output is correct
11 Correct 47 ms 8148 KB Output is correct
12 Incorrect 28 ms 6216 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Incorrect 0 ms 212 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Incorrect 0 ms 212 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #5
0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Incorrect 0 ms 212 KB Output isn't correct
5 Halted 0 ms 0 KB -