Submission #209149

#	Time	Username	Problem	Language	Result	Execution time	Memory
209149		bensonlzl	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	100 / 100	142 ms	7416 KiB

foehn_phenomena

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

ll N, Q, S, T, X, L, R, diff[200005], cont[200005], init = 0;

int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cin >> N >> Q >> S >> T;
	S = -S;
	T = -T;
	for (int i = 0; i <= N; ++i){
		cin >> diff[i];
	}
	for (int i = N; i >= 1; --i){
		diff[i] -= diff[i-1];
	}
	for (int i = 1; i <= N; ++i){
		if (diff[i] < 0) cont[i] = T*diff[i];
		else cont[i] = S*diff[i];
		init += cont[i];
	}
	for (int i = 1; i <= Q; ++i){
		cin >> L >> R >> X;
		init -= cont[L];
		if (R < N) init -= cont[R+1];
		diff[L] += X;
		if (R < N) diff[R+1] -= X;


		if (diff[L] < 0) cont[L] = T*diff[L];
		else cont[L] = S*diff[L];


		if (diff[R+1] < 0) cont[R+1] = T*diff[R+1];
		else cont[R+1] = S*diff[R+1];


		init += cont[L];
		if (R < N) init += cont[R+1];

		cout << init << '\n';
		/*
		for (int j = 1; j <= N; ++j){
			cout << diff[j] << ' ';
		}
		cout << '\n';
		*/
	}
}

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