Submission #197054

#	Time	Username	Problem	Language	Result	Execution time	Memory
197054		Juney	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	100 / 100	146 ms	12892 KiB

foehn_phenomena

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

#define fi first
#define se second

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 2e5 + 5;

int N, Q;
ll S, T, A[MAXN], B[MAXN], ans;

int main() {
	ios::sync_with_stdio(0); cin.tie(0);
	cin >> N >> Q >> S >> T;
	for(int i=0; i<=N; i++) cin >> A[i];
	for(int i=1; i<=N; i++) {
		B[i] = A[i] - A[i-1];
		if(B[i] >= 0) ans -= B[i] * S;
		else ans -= B[i] * T;
	}
	while(Q--) {
		int l, r, x; cin >> l >> r >> x;
		if(B[l] >= 0) ans += B[l] * S;
		else ans += B[l] * T;
		if(r < N) {
			if(B[r+1] >= 0) ans += B[r+1] * S;
			else ans += B[r+1] * T;
		}
		B[l] += x;
		if(r < N) B[r+1] -= x;
		if(B[l] >= 0) ans -= B[l] * S;
		else ans -= B[l] * T;
		if(r < N) {
			if(B[r+1] >= 0) ans -= B[r+1] * S;
			else ans -= B[r+1] * T;
		}
		cout << ans << '\n';
	}
}

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