Submission #636905

#	Time	Username	Problem	Language	Result	Execution time	Memory
636905		ghostwriter	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	100 / 100	121 ms	12364 KiB

foehn_phenomena

#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
#include <debug.h>
#endif
#define st first
#define nd second
#define pb push_back
#define pf push_front
#define _pb pop_back
#define _pf pop_front
#define lb lower_bound
#define ub upper_bound
#define mtp make_tuple
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()
typedef long long ll; typedef unsigned long long ull;
typedef double db; typedef long double ldb;
typedef pair<int, int> pi; typedef pair<ll, ll> pll;
typedef vector<int> vi; typedef vector<ll> vll; typedef vector<pi> vpi; typedef vector<pll> vpll;
typedef string str;
template<typename T> T gcd(T a, T b) { return (b == 0? a : gcd(b, a % b)); }
template<typename T> T lcm(T a, T b) { return a / gcd(a, b) * b; }
#define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
#define FOS(i, r, l) for (int (i) = (r); (i) >= (l); --(i))
#define EACH(i, x) for (auto &(i) : (x))
#define WHILE while
#define file "TEST"
mt19937 rd(chrono::steady_clock::now().time_since_epoch().count());
ll rand(ll l, ll r) { return uniform_int_distribution<ll>(l, r)(rd); }
/*
    Tran The Bao
    CTL - Da Lat
    Cay ngay cay dem nhung deo duoc cong nhan
*/
const int N = 2e5 + 5;
int n, q, s, t, a[N];
ll d[N], ans = 0;
#define cost(d) (d > 0? -1LL * s * d : -1LL * t * d)
signed main() {
    ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
    // freopen(file".inp", "r", stdin);
    // freopen(file".out", "w", stdout);
    cin >> n >> q >> s >> t;
    FOR(i, 0, n) cin >> a[i];
    FOR(i, 1, n) d[i] = a[i] - a[i - 1];
    FOR(i, 1, n) ans += cost(d[i]);
    WHILE(q--) {
    	int l, r, x;
    	cin >> l >> r >> x;
    	ans -= cost(d[l]);
    	d[l] += x;
    	ans += cost(d[l]);
    	if (r < n) {
    		ans -= cost(d[r + 1]);
    		d[r + 1] -= x;
    		ans += cost(d[r + 1]);
    	}
    	cout << ans << '\n';
    }
    return 0;
}

Compilation message (stderr)

foehn_phenomena.cpp: In function 'int main()':
foehn_phenomena.cpp:24:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   24 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
foehn_phenomena.cpp:45:5: note: in expansion of macro 'FOR'
   45 |     FOR(i, 0, n) cin >> a[i];
      |     ^~~
foehn_phenomena.cpp:24:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   24 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
foehn_phenomena.cpp:46:5: note: in expansion of macro 'FOR'
   46 |     FOR(i, 1, n) d[i] = a[i] - a[i - 1];
      |     ^~~
foehn_phenomena.cpp:24:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   24 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
foehn_phenomena.cpp:47:5: note: in expansion of macro 'FOR'
   47 |     FOR(i, 1, n) ans += cost(d[i]);
      |     ^~~

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