Submission #771826

#	Time	Username	Problem	Language	Result	Execution time	Memory
771826		kirakaminski968	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	107 ms	13120 KiB

foehn_phenomena

#include <bits/stdc++.h>
#define ll long long
using namespace std;
int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int N,Q; ll S,T; cin >> N >> Q >> S >> T;
    vector<ll> arr(N+1);
    for(auto &x : arr) cin >> x;
    vector<ll> wind(N);
    for(int i = 0;i<N;++i) wind[i] = arr[i]-arr[i+1];
    auto upd = [&](int ind){
		if(wind[ind] < 0) return S*wind[ind];
		else return T*wind[ind];
	};
    ll ans = 0;
    for(int i = 0;i<N;++i) ans += upd(i);
    while(Q--){
        int l,r; ll val; cin >> l >> r >> val;
        ans -= upd(l-1);
        wind[l-1] -= val;
        ans += upd(l-1);
        if(r < N){
            ans -= upd(r);
            wind[r] += val;
            ans += upd(r);
        }
        cout << ans << "\n";
    }
    return 0;
}

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