Submission #767410

#	Time	Username	Problem	Language	Result	Execution time	Memory
767410		raysh07	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	89 ms	13068 KiB

foehn_phenomena

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define INF (int)1e18
#define f first
#define s second

mt19937_64 RNG(chrono::steady_clock::now().time_since_epoch().count());

void Solve() 
{
    int n, q, s, t;
    cin >> n >> q >> s >> t;
    vector <int> a(n + 1), d(n);
    int c1 = 0, c2 = 0;
    for (int i = 0; i <= n; i++){
        cin >> a[i];
        if (i != 0) {
            d[i - 1] = a[i] - a[i - 1];
            if (d[i - 1] > 0) c1 += d[i - 1];
            else c2 += d[i - 1];
        }
    }
    s = -s;
    
    while (q--){
        int l, r, k; cin >> l >> r >> k;
        
        if (d[l - 1] > 0) c1 -= d[l - 1];
        else c2 -= d[l - 1];
        d[l - 1] += k;
        if (d[l - 1] > 0) c1 += d[l - 1];
        else c2 += d[l - 1];
        
        if (r != n){
            if (d[r] > 0) c1 -= d[r];
            else c2 -= d[r];
            d[r] -= k;
            if (d[r] > 0) c1 += d[r];
            else c2 += d[r];
        }
        
        cout << c1 * s - c2 * t << "\n";
    }
}

int32_t main() 
{
    auto begin = std::chrono::high_resolution_clock::now();
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int t = 1;
  //  cin >> t;
    for(int i = 1; i <= t; i++) 
    {
        //cout << "Case #" << i << ": ";
        Solve();
    }
    auto end = std::chrono::high_resolution_clock::now();
    auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin);
    cerr << "Time measured: " << elapsed.count() * 1e-9 << " seconds.\n"; 
    return 0;
}

• Subtask 1: 30 / 30
• Subtask 2: 10 / 10
• Subtask 3: 60 / 60