Submission #854566

#	Time	Username	Problem	Language	Result	Execution time	Memory
854566		becaido	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	78 ms	5716 KiB

foehn_phenomena

#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx,popcnt,sse4,abm")
#include <bits/stdc++.h>
using namespace std;

#ifdef WAIMAI
#define debug(HEHE...) cout << "[" << #HEHE << "] : ", dout(HEHE)
void dout() {cout << '\n';}
template<typename T, typename...U>
void dout (T t, U...u) {cout << t << (sizeof... (u) ? ", " : ""), dout (u...);}
#else
#define debug(...) 7122
#endif

#define ll long long
#define Waimai ios::sync_with_stdio(false), cin.tie(0)
#define FOR(x,a,b) for (int x = a, I = b; x <= I; x++)
#define pb emplace_back
#define F first
#define S second

const int SIZE = 2e5 + 5;

int n, q, s, t;
ll d[SIZE], sum[2];

void solve() {
    cin >> n >> q >> s >> t;
    FOR (i, 0, n) cin >> d[i];
    for (int i = n; i >= 1; i--) d[i] -= d[i - 1];
    FOR (i, 1, n) {
        if (d[i] > 0) sum[0] += d[i];
        else sum[1] += -d[i];
    }
    while (q--) {
        int l, r, k;
        cin >> l >> r >> k;

        if (d[l] > 0) sum[0] -= d[l];
        else sum[1] -= -d[l];
        if (r < n) {
            if (d[r + 1] > 0) sum[0] -= d[r + 1];
            else sum[1] -= -d[r + 1];
        }

        d[l] += k, d[r + 1] -= k;

        if (d[l] > 0) sum[0] += d[l];
        else sum[1] += -d[l];
        if (r < n) {
            if (d[r + 1] > 0) sum[0] += d[r + 1];
            else sum[1] += -d[r + 1];
        }

        cout << -sum[0] * s + sum[1] * t << '\n';
    }
}

int main() {
    Waimai;
    solve();
}

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