Submission #1062781

#	Time	Username	Problem	Language	Result	Execution time	Memory
1062781		vjudge1	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	79 ms	13904 KiB

foehn_phenomena

#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#define fi first
#define se second
#define for1(i,j,k) for(int i=j;i<=k;i++)
#define for2(i,j,k) for(int i=j;i>=k;i--)
#define for3(i,j,k,l) for(int i=j;i<=k;i+=l)
#define bit(n,i) ((n>>i)&1)
#define all(x) x.begin(),x.end()
#define int long long
typedef long long ll;
typedef pair<int,int> pii;
typedef double ld;
typedef pair<ld,ld> pdd;
typedef pair<ll,ll> pll;
const ll maxn=3e5+5;
const ll offset=2e5;
const ll inf=1e18;
const int base=350;
const ll mod=998244353;
int n,q,s,t,res,a[maxn],b[maxn];
int f(int u)
{
    if (u<0) return u*s;
    else return u*t;
}
void sol()
{
    cin >> n >> q >> s >> t;
    for1(i,0,n) cin  >> b[i];
    for1(i,1,n)
    {
        a[i]=b[i-1]-b[i];
        res+=f(a[i]);
    }
    for1(i,1,q)
    {
        int l,r,x; cin >> l>> r>> x;
        res-=f(a[l]);
        a[l]-=x;
        res+=f(a[l]);
        if (r!=n)
        {
            res-=f(a[r+1]);
            a[r+1]+=x;
            res+=f(a[r+1]);
        }
        cout << res<<'\n';
    }


}
int32_t main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
//    freopen("1017G.inp","r",stdin);
//    freopen("1017G.out","w",stdout);

    int t=1;//cin >> t;
    while (t--) {
        sol();
    }
}

/*
4 12
1 2 3
1 3
2 3
2 1
1 2
1 2
1 4
1 1
1 1
2 4
2 3
1 1
3 4



*/

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