Submission #33265

#	Time	Username	Problem	Language	Result	Execution time	Memory
33265		user202729	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	100 / 100	466 ms	6708 KiB

foehn_phenomena

// https://oj.uz/problem/view/JOI17_foehn_phenomena

#ifndef _GLIBCXX_DEBUG
#define NDEBUG
#endif // _GLIBCXX_DEBUG

#include <iostream>
#include <vector>
#include <cassert>


using ll = int64_t;

int main() {
	int JOIhome, nMove, decTempPerAlt, incTempPerAlt;
	std::cin >> JOIhome >> nMove >> decTempPerAlt >> incTempPerAlt;
	std::vector<ll> height (JOIhome + 1);
	for (ll& h : height) std::cin >> h;

	ll temperature = 0; // temperature at 0
	std::vector<ll> diff (JOIhome);

	auto add_diff = [&temperature, decTempPerAlt, incTempPerAlt](ll diff){
		if (diff > 0) {
			temperature -= decTempPerAlt * diff;
		} else {
			temperature += incTempPerAlt * (-diff);
		}
	};

	auto remove_diff = [&temperature, decTempPerAlt, incTempPerAlt](ll diff){
		if (diff > 0) {
			temperature += decTempPerAlt * diff;
		} else {
			temperature -= incTempPerAlt * (-diff);
		}
	};

	for (int spot = 1; spot <= JOIhome; ++spot) {
		// now temperature @ spot - 1
		diff[spot - 1] = height[spot] - height[spot - 1];
		add_diff(diff[spot - 1]);
	}

	std::vector<ll> result;
	result.reserve(nMove);

	while (nMove --> 0) {
		int leftBound, rightBound, delta;
		std::cin >> leftBound >> rightBound >> delta;

		assert(leftBound != 0);

		remove_diff(diff[leftBound - 1]);
		diff[leftBound - 1] += delta;
		add_diff(diff[leftBound - 1]);

		if (rightBound != JOIhome) {
			remove_diff(diff[rightBound]);
			diff[rightBound] -= delta;
			add_diff(diff[rightBound]);
		}

		result.push_back(temperature);
	}

	for (ll x : result) std::cout << x << '\n';
}

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