Submission #654529

#	Time	Username	Problem	Language	Result	Execution time	Memory
654529		hail	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	126 ms	13064 KiB

foehn_phenomena

#include <bits/stdc++.h>
 
using namespace std;
 
#define vi vector<int>
#define vll vector<long long>
#define pb push_back
using ll= long long;
#define fast_io ios::sync_with_stdio(0); cin.tie(0)
#define inpint(x) int x; cin>>x
#define inpll(x) long long x; cin>>x
#define fl(i, n) for(int i=0; i<n; i++)
#define flo(i, n) for(int i=1; i<=n; i++)
#define int long long 
#define pi pair<int, int>
#define mp make_pair
#define ld long double

const int MOD = 7 + (int)1e9;
const int INF = (int)1e18;

//

void solve()
{
    int n, q, s, t;
    cin>>n>>q>>s>>t;

    vector<int> a(n+1, 0);
    vector<int> d(n+1, 0); // a[i+1] - a[i]

    int ans = 0;

    for(int i = 0; i<=n; i++)
    {
        cin>>a[i];
    }
    for(int i=0; i<n; i++)
    {
        d[i] = a[i+1] - a[i];
        if(d[i]>=0) ans -= d[i]*s;
        else ans -= d[i]*t;
    }

    for(int i=1; i<=q; i++)
    {
        int l, r, x;
        cin>>l>>r>>x;


        if(l!=0)
        {
            if(d[l-1]<0) ans += d[l-1]*t;
            else ans += s*d[l-1];
            d[l-1] += x;
            if(d[l-1]>=0) ans -= d[l-1]*s;
            else ans -= d[l-1]*t;
        }
        if(r!=n)
        {
            if(d[r]<0) ans += d[r]*t;
            else ans += d[r]*s;
            d[r] -= x;
            if(d[r]>=0) ans -= d[r]*s;
            else ans -= d[r]*t;            
        }

        cout<<ans<<"\n";
    }


}

signed main()
{
    fast_io;

    int t=1; 
    //cin>>t;
    while(t--)
    {
        solve();
    }
    cout<<endl;
}

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