Submission #548490

#	Time	Username	Problem	Language	Result	Execution time	Memory
548490		Um_nik	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	135 ms	11500 KiB

foehn_phenomena

#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <algorithm>
#include <cmath>
#include <vector>
#include <set>
#include <map>
#include <unordered_set>
#include <unordered_map>
#include <queue>
#include <ctime>
#include <cassert>
#include <complex>
#include <string>
#include <cstring>
#include <chrono>
#include <random>
#include <bitset>
using namespace std;

#ifdef LOCAL
	#define eprintf(...) fprintf(stderr, __VA_ARGS__);fflush(stderr);
#else
	#define eprintf(...) 42
#endif

using ll = long long;
using ld = long double;
using uint = unsigned int;
using ull = unsigned long long;
template<typename T>
using pair2 = pair<T, T>;
using pii = pair<int, int>;
using pli = pair<ll, int>;
using pll = pair<ll, ll>;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
ll myRand(ll B) {
	return (ull)rng() % B;
}

#define pb push_back
#define mp make_pair
#define all(x) (x).begin(),(x).end()
#define fi first
#define se second

clock_t startTime;
double getCurrentTime() {
	return (double)(clock() - startTime) / CLOCKS_PER_SEC;
}

const int N = (int)1e6 + 5;
int n, q;
ll s, t;
ll a[N];
ll ans;

ll getVal(ll x) {
	if (x >= 0) return -x * s;
	return -x * t;
}

int main()
{
	startTime = clock();
//	freopen("input.txt", "r", stdin);
//	freopen("output.txt", "w", stdout);

	scanf("%d%d%lld%lld", &n, &q, &s, &t);
	ll lst = 0;
	scanf("%lld", &lst);
	for (int i = 0; i < n; i++) {
		ll x;
		scanf("%lld", &x);
		a[i] = x - lst;
		ans += getVal(a[i]);
		lst = x;
	}
	while(q--) {
		int l, r;
		ll x;
		scanf("%d%d%lld", &l, &r, &x);
		l--;
		ans -= getVal(a[l]);
		a[l] += x;
		ans += getVal(a[l]);
		if (r < n) {
			ans -= getVal(a[r]);
			a[r] -= x;
			ans += getVal(a[r]);
		}
		printf("%lld\n", ans);
	}

	return 0;
}

Compilation message (stderr)

foehn_phenomena.cpp: In function 'int main()':
foehn_phenomena.cpp:70:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   70 |  scanf("%d%d%lld%lld", &n, &q, &s, &t);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
foehn_phenomena.cpp:72:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   72 |  scanf("%lld", &lst);
      |  ~~~~~^~~~~~~~~~~~~~
foehn_phenomena.cpp:75:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   75 |   scanf("%lld", &x);
      |   ~~~~~^~~~~~~~~~~~
foehn_phenomena.cpp:83:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   83 |   scanf("%d%d%lld", &l, &r, &x);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

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