Submission #51530

#	Time	Username	Problem	Language	Result	Execution time	Memory
51530		vivukhue	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	100 / 100	766 ms	7612 KiB

foehn_phenomena

#include <bits/stdc++.h>

using namespace std;

signed main()
{
    long long n,q,s,t;
    cin>>n>>q>>s>>t;

    long long result = 0;
    long long a[n+1];
    long long b[n+1];

    a[0] = 0;
    for(long long i=0;i<=n;i++)
        cin>>a[i];

    for(long long i=1;i<=n;i++)
    {
        b[i] = a[i-1] - a[i];
        if(b[i]<0)
            result += b[i]*s;
        else
            result += b[i]*t;
    }

    for(long long i=0;i<q;i++)
    {
        long long l,r,x;
        cin>>l>>r>>x;
        if(l)
        {
            if(b[l]<0)
                result -= b[l]*s;
            else
                result -= b[l]*t;
            b[l] -= x;
            if(b[l]<0)
                result += b[l]*s;
            else
                result += b[l]*t;
        }
        if(r<n)
        {
            if(b[r+1]<0)
                result -= b[r+1]*s;
            else
                result -= b[r+1]*t;
            b[r+1] += x;
            if(b[r+1]<0)
                result += b[r+1]*s;
            else
                result += b[r+1]*t;
        }
        cout<<result<<'\n';
    }
}

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