Submission #1053611

#	Time	Username	Problem	Language	Result	Execution time	Memory
1053611		vanea	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	100 / 100	185 ms	30292 KiB

foehn_phenomena

#include <bits/stdc++.h>
using namespace std;
using ll = long long;

const int mxN = 2e6+10;

array<ll, 3> st[mxN];
ll ass[mxN];

ll s, t;

void propagate(int node, int l, int r) {
    if(l == r) return;
    int left = node*2, right = node*2+1;
    ass[left] += ass[node];
    ass[right] += ass[node];
    st[left][1] += ass[node];
    st[left][2] += ass[node];
    st[right][1] += ass[node];
    st[right][2] += ass[node];
    ass[node] = 0;
}

void build(int node, int l, int r, vector<ll>& a) {
    if(l == r) {
        st[node] = {0, a[l], a[l]};
        return ;
    }
    int mid = (l+r)/2;
    build(node*2, l, mid, a);
    build(node*2+1, mid+1, r, a);
    int left = node*2, right = node*2+1;
    st[node][0] = st[left][0] + st[right][0];
    st[node][1] = st[left][1]; st[node][2] = st[right][2];
    if(st[left][2] < st[right][1]) {
        st[node][0] -= s * (st[right][1] - st[left][2]);
    }
    else {
        st[node][0] += t * (st[left][2] - st[right][1]);
    }
}

void upd(int node, int l, int r, int l1, int r1, ll x) {
    propagate(node, l, r);
    if(l1 <= l && r1 >= r) {
        st[node][1] += x;
        st[node][2] += x;
        ass[node] += x;
        propagate(node, l, r);
        return ;
    }
    if(l1 > r || r1 < l) return ;
    int mid = (l+r)/2;
    upd(node*2, l, mid, l1, r1, x);
    upd(node*2+1, mid+1, r, l1, r1, x);
    int left = node*2, right = node*2+1;
    st[node][0] = st[left][0] + st[right][0];
    st[node][1] = st[left][1]; st[node][2] = st[right][2];
    if(st[left][2] < st[right][1]) {
        st[node][0] -= s * (st[right][1] - st[left][2]);
    }
    else {
        st[node][0] += t * (st[left][2] - st[right][1]);
    }
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n, q;
    cin >> n >> q >> s >> t; n++;
    vector<ll> a(n);
    for(int i = 0; i < n; i++) {
        cin >> a[i];
    }
    build(1, 0, n-1, a);
    while(q--) {
        int l, r; ll x;
        cin >> l >> r >> x;
        upd(1, 0, n-1, l, r, x);
        cout << st[1][0] << '\n';
    }
    return 0;
}

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