Submission #237673

#	Time	Username	Problem	Language	Result	Execution time	Memory
237673		zaneyu	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	100 / 100	721 ms	24312 KiB

foehn_phenomena

/*input
7 8 8 13
0
4
-9
4
-2
3
10
-9
1 4 8
3 5 -2
3 3 9
1 7 4
3 5 -1
5 6 3
4 4 9
6 7 -10
*/
#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;

#pragma GCC optimize("unroll-loops,no-stack-protector")
//order_of_key #of elements less than x
// find_by_order kth element
#define ll long long 
#define ld long double
#define pii pair<double,double>
typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;
#define f first
#define s second
#define pb push_back
#define REP(i,n) for(int i=0;i<n;i++)
#define REP1(i,n) for(int i=1;i<=n;i++)
#define FILL(n,x) memset(n,x,sizeof(n))
#define ALL(_a) _a.begin(),_a.end()
#define sz(x) (int)x.size()
#define SORT_UNIQUE(c) (sort(c.begin(),c.end()), c.resize(distance(c.begin(),unique(c.begin(),c.end()))))
#define MP make_pair
const ll INF64=4e12;
const int INF=0x3f3f3f3f;
const ll MOD=1e9+7;
const ld PI=acos(-1);
const ld eps=1e-9;
#define lowb(x) x&(-x)
#define MNTO(x,y) x=min(x,(__typeof__(x))y)
#define MXTO(x,y) x=max(x,(__typeof__(x))y)
ll mult(ll a,ll b){
    return ((a%MOD)*(b%MOD))%MOD;
}
ll mypow(ll a,ll b){
    if(b<=0) return 1;
    ll res=1LL;
    while(b){
        if(b&1){
            res=(res*a)%MOD;
        }
        a=(a*a)%MOD;
        b>>=1;
    }
    return res;
}
const ll maxn=2e5+5;
const ll maxlg=__lg(maxn)+2;
#define int ll
int arr[maxn];
struct node{
    ll mx,lazy=0;

}seg[4*maxn];
node pull(node a,node b){
    node x;
    x.mx=max(a.mx,b.mx);
    return x;
}
void pushdown(int idx,int l,int r){
    if(!seg[idx].lazy) return;
    seg[idx].mx+=seg[idx].lazy;
    if(l==r){
        seg[idx].lazy=0;
        return;
    }
    seg[idx*2].lazy+=seg[idx].lazy;
    seg[idx*2+1].lazy+=seg[idx].lazy;
    seg[idx].lazy=0;
}
void build(int idx,int l,int r){
    if(l==r){
        seg[idx].mx=arr[l];
        return;
    }
    int mid=(l+r)/2;
    build(idx*2,l,mid);
    build(idx*2+1,mid+1,r);
    seg[idx]=pull(seg[idx*2],seg[idx*2+1]);    
}
void upd(int idx,int l,int r,int ql,int qr,int x){
    pushdown(idx,l,r);
    if(r<ql or l>qr) return;
    if(ql<=l and r<=qr){
        seg[idx].lazy+=x;
        pushdown(idx,l,r);
        return;
    }
    int mid=(l+r)/2;
    upd(idx*2,l,mid,ql,qr,x);
    upd(idx*2+1,mid+1,r,ql,qr,x);
    seg[idx]=pull(seg[idx*2],seg[idx*2+1]);
}
ll query(int idx,int l,int r,int ql,int qr){
    if(r<ql or l>qr) return -INF64;
    pushdown(idx,l,r);
    if(ql<=l and r<=qr){
        return seg[idx].mx;
    }
    int mid=(l+r)/2;
    return max(query(idx*2,l,mid,ql,qr),query(idx*2+1,mid+1,r,ql,qr));
}
int n;
ll get(int i){
    return query(1,0,n-1,i,i);
}
ll ssum=0,tsum=0;
int32_t main(){
    ios::sync_with_stdio(false),cin.tie(0);
    int q,s,t;
    cin>>n>>q>>s>>t;
    ++n;
    REP(i,n){
        cin>>arr[i];
        if(i){
            if(arr[i]>arr[i-1]) ssum+=(arr[i]-arr[i-1]);
            else tsum+=(arr[i-1]-arr[i]);
        }
    }
    build(1,0,n-1);
    REP(i,q){
        int l,r,x;
        cin>>l>>r>>x;
        int tl=get(l),tl1=get(l-1);
        if(tl>tl1) ssum-=(tl-tl1);
        else tsum-=(tl1-tl);
        if(r!=(n-1)){
            tl1=get(r),tl=get(r+1);
            if(tl>tl1) ssum-=(tl-tl1);
            else tsum-=(tl1-tl);            
        }
        upd(1,0,n-1,l,r,x);
        tl=get(l),tl1=get(l-1);
        if(tl>tl1) ssum+=(tl-tl1);
        else tsum+=(tl1-tl);
        if(r!=(n-1)){
            tl1=get(r),tl=get(r+1);
            if(tl>tl1) ssum+=(tl-tl1);
            else tsum+=(tl1-tl);            
        }
        //cout<<tsum<<' '<<ssum<<' ';
        cout<<tsum*t-ssum*s<<'\n';
    }
}

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