Submission #951102

#	Time	Username	Problem	Language	Result	Execution time	Memory
951102		star	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	100 / 100	491 ms	13224 KiB

foehn_phenomena

#include <bits/stdc++.h>
using namespace std;
#define LL long long
#define N 200010
int n, m, s, t;
LL a[N], d[N], L;
LL sum = 0;

LL p (LL x)
{
    return x*(x>0 ?s :t);
}

int main()
{
    cin >> n >> m >> s >> t;
    cin >> L;
    for(int i=1;i<=n;i ++)
    {
        cin >> a[i];
        d[i]=a[i]-L;
        L=a[i];
        sum+=p(d[i]);
    }
    for(int i=1;i<=m;i++)
    {
        int l, r;
        LL x;
        cin >> l >> r >> x;
        sum-=p(d[l]);
        d[l]+=x;
        sum+=p(d[l]);

        if(r == n)
        {
            cout << -sum << '\n';
            continue;
        }
        sum-=p(d[r+1]);
        d[r+1]-=x;
        sum+=p(d[r+1]);
        cout << -sum << '\n';
    }
    return 0;
}

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