Submission #1258704

#	Time	Username	Problem	Language	Result	Execution time	Memory
1258704		pntmatchalatte0309	Foehn Phenomena (JOI17_foehn_phenomena)	C++20	100 / 100	61 ms	7364 KiB

foehn_phenomena

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

const long long N = 2000005;
long long a[N], d[N];
long long n, q, s, t;

int main () {
    ios_base :: sync_with_stdio(0);
    cin.tie(0);
    cin >> n >> q >> s >> t;
    d[0] = 0;
    for (int i = 0; i <= n; i++) {
        cin >> a[i];
    }
    for (int i = 1; i <= n; i++) {
        d[i] = a[i] - a[i-1];
    }
    long long res = 0;
    for (int i = 1; i <= n; i++) {
        if (d[i] <= 0) res += t * abs(d[i]);
        else res -= s * abs(d[i]);
    }
    while (q--) {
        long long l, r, x;
        cin >> l >> r >> x;
        if (d[l] <= 0) res -= t * abs(d[l]);
        else res += s * abs (d[l]);
        d[l] += x;
        if (d[l] <= 0) res += t * abs(d[l]);
        else res -= s * abs(d[l]);
        if (r>=n) {
            cout << res << '\n';
            continue;
        }
        if (d[r+1] <= 0) res -= t * abs (d[r+1]);
        else res += s * abs (d[r+1]) ;
        d[r+1] -= x;
        if (d[r+1] <= 0) res += t * abs (d[r+1]);
        else res -= s * abs (d[r+1]) ;
        cout << res << '\n';
    }
    return 0;
}

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