Submission #392921

#	Time	Username	Problem	Language	Result	Execution time	Memory
392921		vishesh312	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	137 ms	13144 KiB

foehn_phenomena

#include "bits/stdc++.h"
using namespace std;
/*
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
using ordered_set = tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update>;
*/

#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
#define sz(x) (int)x.size()

using ll = long long;
#define int ll
const int mod = 1e9+7;

int calc(int a, int s, int t) {
    return (a > 0 ? -a*s : -a*t);
}

void solve(int tc) {
    int n, q, s, t;
    cin >> n >> q >> s >> t;
    int ans = 0;
    vector<int> v(n+1);
    for (auto &x : v) cin >> x;
    vector<int> d(n+1);
    for (int i = 1; i <= n; ++i) {
        d[i] = v[i] - v[i-1];
        ans += calc(d[i], s, t);
    }
    while (q--) {
        int l, r, x;
        cin >> l >> r >> x;
        ans += calc(d[l] + x, s, t) - calc(d[l], s, t);
        d[l] += x;
        if (r != n) {
            ans += calc(d[r+1]-x, s, t) - calc(d[r+1], s, t);
            d[r+1] -= x;
        }
        cout << ans << '\n';
    }
}

signed main() {
    ios_base::sync_with_stdio(false); cin.tie(NULL);
    int tc = 1;
    //cin >> tc;
    for (int i = 1; i <= tc; ++i) solve(i);
    return 0;
}

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