Submission #545644

#	Time	Username	Problem	Language	Result	Execution time	Memory
545644		pokmui9909	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	138 ms	11468 KiB

foehn_phenomena

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

ll N, Q, S, T;
ll A[200005];
ll f(ll k){
    return (A[k] > 0 ? -S * A[k] : -T * A[k]);
}

int main(){
    cin.tie(0) -> sync_with_stdio(false);

    cin >> N >> Q >> S >> T;
    ll r = 0;
    for(int i = 0; i <= N; i++){
        cin >> A[i];
    }
    for(int i = N; i >= 1; i--){
        A[i] -= A[i - 1];
        r += f(i);
    }
    while(Q--){
        ll L, R, X; cin >> L >> R >> X;
        r -= f(L); A[L] += X; r += f(L);
        if(R + 1 <= N) {
            r -= f(R + 1); A[R + 1] -= X; r += f(R + 1);
        }
        cout << r << '\n';
    }
}

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