Submission

Score: 0

User: vachirasawin

Problemset: ซื้อขายหุ้นซีเค

Language: cpp

Time: 0.000 second

Submitted On: 2026-03-13 18:13:34

// grader-chan
// c2_st66_stock.cpp | c2_st66_stock

#include <bits/stdc++.h>
using namespace std;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);

    int N;
    cin >> N;

    vector<int> P(N);
    for (int i = 0; i <= N; i++) cin >> P[i];

    long long ans = 0;
    for (int i = 1; i < N - 1; i++) ans += max(0LL, P[i + 1] - P[i]);

    cout << ans << "\n";

    return 0;
}