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Submission #336829

# Submission time Handle Problem Language Result Execution time Memory
336829 2020-12-17T00:45:11 Z thecodingwizard Potatoes and fertilizers (LMIO19_bulves) C++11
0 / 100
 1 ms 364 KB 
#include <bits/stdc++.h>

using namespace std;

using ll = long long;
#define ii pair<int, int>
#define f first
#define s second
#define pb push_back
#define mp make_pair
#define all(x) x.begin(), x.end()
#define sz(x) (int)x.size()
#define F0R(i, n) for (int i = 0; i < n; i++)
#define FOR(i, a, b) for (int i = a; i < b; i++)
#define inf 1000000010

int main() {
    cin.tie(0)->sync_with_stdio(0);

    int n; cin >> n;

    ll dp0 = 0; // y-intercept

    // slope increases by one at each of these points
    priority_queue<ll> slopeChanges;

    ll initialSlope = 0;

    ll totA = 0, totB = 0;
    ll diff;
    F0R(i, n) {
        int a, b; cin >> a >> b; totA += a; totB += b;

        diff = totA - totB;

        dp0 += diff;
        initialSlope--;

        // at x = diff, the function slope changes by two
        slopeChanges.push(diff);
        slopeChanges.push(diff);

        // remove the final slope change that will cause the slope to become positive
        slopeChanges.pop();
    }

    // Want to calculate dp value where x = diff (the final difference)
    vector<ll> changes;
    while (!slopeChanges.empty()) { changes.pb(slopeChanges.top()); slopeChanges.pop(); }
    reverse(all(changes));
    ll curX = 0, slope = initialSlope;
    for (ll x : changes) {
        if (x >= 0) {
            ll dist = x - curX;
            dp0 += slope*dist;
            curX = x;
        }
        slope++;
    }

    cout << dp0 << endl;

    return 0;
}

Subtask #1
0 / 24.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 36.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB Output isn't correct
2 Halted 0 ms 0 KB -