Submission #239110

#	Time	Username	Problem	Language	Result	Execution time	Memory
239110		aggu_01000101	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	100 / 100	662 ms	20004 KiB

foehn_phenomena

#include <bits/stdc++.h>
#define int long long
#define INF 1000000000000000
#define lchild(i) (i*2 + 1)
#define rchild(i) (i*2 + 2)
#define mid(l, u) ((l+u)/2)
#define x(p) p.first
#define y(p) p.second
#define MOD 998244353

using namespace std;
const int N = 200005;
int n, q, s, t;
int a[N];
int seg[4*N];
int laz[4*N];
int build(int l, int u, int i){
    laz[i] = 0;
    if(l==u) return seg[i] = a[l];
    return seg[i] = min(build(l, mid(l, u), lchild(i)),build(mid(l, u) + 1, u, rchild(i)));
}
int query(int l, int u, int i, int uu){
    if(laz[i]!=0){
        seg[i]+=laz[i];
        if(l!=u){
            laz[lchild(i)]+=laz[i];
            laz[rchild(i)]+=laz[i];
        }
        laz[i] = 0;
    }
    if(l>=uu && u<=uu) return seg[i];
    if(l>uu || u<uu) return INF;
    return min(query(l, mid(l, u), lchild(i), uu), query(mid(l, u)+1, u, rchild(i), uu));
}
int update(int l, int u, int i, int ll, int uu, int x){
    if(laz[i]!=0){
        seg[i]+=laz[i];
        if(l!=u){
            laz[lchild(i)]+=laz[i];
            laz[rchild(i)]+=laz[i];
        }
        laz[i] = 0;
    }
    if(l>=ll && u<=uu){
        seg[i]+=x;
        if(l!=u){
            laz[lchild(i)]+=x;
            laz[rchild(i)]+=x;
        }
        return seg[i];
    }
    if(l>uu || u<ll) return seg[i];
    return seg[i] = min(update(l, mid(l, u), lchild(i), ll, uu, x), update(mid(l, u)+1, u, rchild(i), ll, uu, x));
}
int toadd(int a, int b){
    int tr = 0;
    if(b>=a){
        tr = (b-a)*(-s);
    }
    else{
        tr = (a-b)*t;
    }
    return tr;
}
int get(int i){
    return query(0, n, 0, i);
}
signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    cin>>n>>q>>s>>t;
    for(int i = 0;i<=n;i++) cin>>a[i];
    int curr = 0;
    for(int i = 0;i<n;i++){
        curr+=toadd(a[i], a[i+1]);
    }
    build(0, n, 0);
    while(q--){
        int l, r, x;
        cin>>l>>r>>x;
        if(l>0) curr-=(toadd(get(l-1), get(l)));
        if(r<n) curr-=(toadd(get(r), get(r+1)));
        update(0, n, 0, l, r, x);
        if(l>0) curr+=(toadd(get(l-1), get(l)));
        if(r<n) curr+=(toadd(get(r), get(r+1)));
        cout<<curr<<"\n";
    }
}

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