Submission #593167

#	Time	Username	Problem	Language	Result	Execution time	Memory
593167		VasLemmy	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	113 ms	13084 KiB

foehn_phenomena

/// slava sovet·skomu soyuzu
#include <bits/stdc++.h>
using namespace std;
using db = long double;

#define int long long
#define ll long long
#define pii pair<int,int>
#define fi first
#define se second
#define pb push_back

const int mod =  1000000007;
const int maxN = 200005;
const int base = 31;
const ll infty = 1000000000000000000;

int n,q,s,t;
int a[maxN];
int b[maxN];

void read()
{
    cin >> n >> q >> s >> t;
    for(int i = 0;i <= n;i++)
    {
        cin >> a[i];
    }
    int res = 0;
    for(int i = 1;i <= n;i++)
    {
        if(a[i] > a[i-1]) res -= s * (a[i] - a[i-1]);
        else res -= t * (a[i] - a[i-1]);
        b[i] = a[i] - a[i-1];
    }

    while(q--)
    {
        int L,R,x;
        cin >> L >> R >> x;
        if(b[L] > 0) res += s * b[L];
        else res += t * b[L];
        if(R < n)
        {
            if(b[R+1] > 0) res += s * b[R+1];
            else res += t * b[R+1];
        }
        b[L] += x;
        b[R+1] -= x;
        if(b[L] > 0) res -= s * b[L];
        else res -= t * b[L];
        if(R < n)
        {
            if(b[R+1] > 0) res -= s * b[R+1];
            else res -= t * b[R+1];
        }

        cout << res <<'\n';
    }

}

void sol()
{

}

int32_t main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    //freopen("test.inp","r",stdin);
    int tests;
    //cin >> tests;
    tests = 1;
    while (tests--)
    {
        read();
        sol();
    }
    return 0;
}

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