Submission #946956

#	Time	Username	Problem	Language	Result	Execution time	Memory
946956		mariamp1	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	0 / 100	287 ms	3972 KiB

foehn_phenomena

#include <iostream>
#include <vector>
#include <algorithm>
typedef long long int ll;
using namespace std;

const int maxn = 2e5+10;
int n, q, a[maxn];
int sum, dif[maxn], s, t;
 
int main()
{
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cin >> n >> q >> s >> t;
 
    for(int i = 0 ; i <= n; i++) cin >> a[i];
 
    for(int i = 1 ; i <= n ; i++)
    {
        dif[i] = a[i]-a[i-1];
        if(dif[i] <= 0) sum += abs(dif[i]*t);
        else sum -= abs(dif[i]*s);
    }
 
    //cout << sum << endl;
 
    dif[0] = dif[n+1] = 0;
 
    //for(int i = 1 ; i <= n ; i++) cout << dif[i] << ' ';
    //cout << endl;
 
    for(int i = 0 ; i < q ; i++)
    {
        int l, r, x;
        cin >> l >> r >> x;
 
        //cout << dif[l] << ' ' << dif[r+1] << endl;
 
        if(dif[l] <= 0) sum -= abs(dif[l]*t);
        else sum += abs(dif[l]*s);
 
        if(dif[r+1] <= 0) sum -= abs(dif[r+1]*t);
        else sum += abs(dif[r+1]*s);
 
        dif[l] += x;
        if(r+1 <= n) dif[r+1] -= x;
 
        if(dif[l] <= 0) sum += abs(dif[l]*t);
        else sum -= abs(dif[l]*s);
 
        if(dif[r+1] <= 0) sum += abs(dif[r+1]*t);
        else sum -= abs(dif[r+1]*s);
    
        //cout << dif[l] << ' ' << dif[r+1] << endl;
 
        cout << sum << endl;
    
    //    for(int i = 1 ; i <= n ; i++) cout << dif[i] << ' ';
    }
}

• Subtask 1: 0 / 30
• Subtask 2: 0 / 10
• Subtask 3: 0 / 60