Submission #1051579

#	Time	Username	Problem	Language	Result	Execution time	Memory
1051579		VahanAbraham	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	400 ms	13136 KiB

foehn_phenomena

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <string>
#include <algorithm>
#include <cstring>
#include <cstdio>
#include <sstream>
#include <map>
#include <stack>
#include <set>
#include <queue>
#include <list>
#include <unordered_set>
#include <unordered_map>
#include <math.h>
#include <bitset>
#include <cmath>
#include <vector>
#include <iomanip>
#include <random>
#include <chrono>
#include <cassert>

using namespace std;

#define ll long long
#define fr first
#define sc second
#define pb push_back
#define US freopen(".in", "r", stdin); freopen("j.out", "w", stdout);

ll gcd(ll a, ll b)
{
    if (a == 0 || b == 0) {
        return  max(a, b);
    }
    if (a <= b) {
        return gcd(a, b % a);
    }
    else {
        return gcd(a % b, b);
    }
}
ll lcm(ll a, ll b) {
    return (a / gcd(a, b)) * b;
}

const int N = 300005;
const ll oo = 100000000000000000, MOD = 1000000007;

ll a[N], b[N];
ll t[4 * N];


void ubd1(int l, int r,ll val, int lx, int rx, int x) {
    if (lx > r || rx<l) {
        return;
    }
    if (l <= lx && rx <= r) {
        t[x] += val;
        return;
    }
    int m = (lx + rx) / 2;
    ubd1(l, r, val, lx, m, 2 * x);
    ubd1(l, r, val, m + 1, rx, 2 * x + 1);
}

ll get1(int ind, int l, int r, int x) {
    if (l == r) {
        return t[x] + a[l];
    }
    int m = (l + r) / 2;
    if (ind <= m) {
        return t[x] + get1(ind, l, m, 2 * x);
    }
    else {
        return t[x] + get1(ind, m + 1, r, 2 * x + 1);
    }
}

//void build(int l, int r, int x) {
//    if (l == r) {
//        t1[x].v = 0;
//        t1[x].ans = b[l];
//        t1[x].size = 1;
//        return;
//    }
//    int m = (l + r) / 2;
//    build(l, m, 2 * x);
//    build(m + 1, r, 2 * x + 1);
//    t1[x].v = 0;
//    t1[x].ans = t1[2 * x].ans + t1[2 * x + 1].ans;
//    t1[x].size = t1[2 * x].size + t1[2 * x + 1].size;
//}
//
//void ubd1(int l,int r,)

void solve() {
    int n, q;
    ll s, t;
    cin >> n >> q >> s >> t;;
    for (int i = 0; i <= n; ++i) {
        cin >> a[i];
    }
    ll sum = 0;
    for (int i = 1; i <= n; ++i) {
        if (a[i] <= a[i - 1]) {
            b[i] = t * (a[i - 1] - a[i]);
        }
        else {
            b[i] = -((a[i] - a[i - 1]) * s);
        }
        sum += b[i];
    }
    while (q--) {
        int l, r, x;
        cin >> l >> r >> x;
        ll val1 = get1(l, 0, n, 1);
        ll val2 = get1(l - 1, 0, n, 1);
        //cout << l << " " << val1 << " " << val2 << endl;
        if (val1 > val2) {
            sum -= -((val1 - val2) * s);
        }
        else {
            sum -= (val2 - val1) * t;
        }
        if (r < n) {
            val1 = get1(r, 0, n, 1);
            val2 = get1(r + 1, 0, n, 1);
            //cout <<"RR "<< r << " " << val1 << " " << val2 << endl;
            if (val1 < val2) {
                sum -= -((val2 - val1) * s);
            }
            else {
                sum -= ((val1 - val2) * t);
            }
        }
        ubd1(l, r, x, 0, n, 1);
        val1 = get1(l, 0, n, 1);
        val2 = get1(l - 1, 0, n, 1);
        if (val1 > val2) {
            sum += -((val1 - val2) * s);
        }
        else {
            sum += ((val2 - val1) * t);
        }
        if (r < n) {
            val1 = get1(r, 0, n, 1);
            val2 = get1(r + 1, 0, n, 1);
            if (val1 < val2) {
                sum += -((val2 - val1) * s);
            }
            else {
                sum += ((val1 - val2) * t);
            }
        }
        cout << sum << endl;
    }
}

int main() {
    ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
    //US
    int tt = 1;
    //cin >> tt;
    while (tt--) {
        solve();
    }
}

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