제출 #544708

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
544708		SavicS	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	149 ms	12360 KiB

foehn_phenomena

#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <bits/stdc++.h>
 
using namespace std;
using namespace __gnu_pbds;
 
typedef long long ll;
typedef long double ld;
 
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef pair<ld,ld> pdd;
 
#define ff(i,a,b) for(int i = a; i <= b; i++)
#define fb(i,b,a) for(int i = b; i >= a; i--)
#define trav(a,x) for (auto& a : x)
 
#define sz(a) (int)(a).size()
#define pb push_back
#define fi first
#define se second
#define lb lower_bound
#define ub upper_bound
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
 
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

template<typename T>
using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

// os.order_of_key(k) the number of elements in the os less than k
// *os.find_by_order(k)  print the k-th smallest number in os(0-based)

const int mod = 1000000007;
const int inf = 1e9 + 5;
const int mxN = 200005; 

int n, q, S, T;
int niz[mxN];

ll P[mxN];

int main() {
    cin.tie(0)->sync_with_stdio(0);

    cin >> n >> q >> S >> T;
    ff(i,0,n)cin >> niz[i];

    ff(i,1,n)P[i] = niz[i] - niz[i - 1];

    ll uk = 0;
    ff(i,1,n){
        if(P[i] >= 0)uk -= 1ll * P[i] * S;
        else uk -= 1ll * P[i] * T;
    }    

    while(q--){
        int l, r, val;
        cin >> l >> r >> val;

        if(P[l] >= 0)uk += 1ll * P[l] * S;
        else uk += 1ll * P[l] * T;

        if(r != n){
            if(P[r + 1] >= 0)uk += 1ll * P[r + 1] * S;
            else uk += 1ll * P[r + 1] * T;
        }

        P[l] += val; if(r != n)P[r + 1] -= val;

        if(P[l] >= 0)uk -= 1ll * P[l] * S;
        else uk -= 1ll * P[l] * T;

        if(r != n){
            if(P[r + 1] >= 0)uk -= 1ll * P[r + 1] * S;
            else uk -= 1ll * P[r + 1] * T;
        }

        cout << uk << '\n';

    }

    return 0;
}
/*
 
3 5 1 2 
0 4 1 8
1 2 2 
1 1 -2 
2 3 5 
1 2 -1
1 3 5
 
// probati bojenje sahovski
*/
 
 
 
 
 

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