Submission #933730

#	Time	Username	Problem	Language	Result	Execution time	Memory
933730		Irate	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	100 / 100	86 ms	12420 KiB

foehn_phenomena

#include<bits/stdc++.h>
using namespace std;
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n, q, s, t;
    cin >> n >> q >> s >> t;
    s = -s;
    vector<int>v(n + 1);
    for(int i = 0;i <= n;++i){
        cin >> v[i];
    }
    vector<long long>diff(n + 5);
    long long temper = 0;
    for(int i = 1;i <= n;++i){
        diff[i] = v[i] - v[i - 1];
        if(diff[i] < 0){
            temper += (long long)t * -diff[i];
        }
        else{
            temper += (long long)s * diff[i];
        }
    }
    while(q--){
        int l, r, x;
        cin >> l >> r >> x;
        if(diff[l] < 0){
            temper -= (long long)t * -diff[l];
        }
        else{
            temper -= (long long)s * diff[l];
        }
        if(diff[r + 1] < 0){
            temper -= (long long)t * -diff[r + 1];
        }
        else{
            temper -= (long long)s * diff[r + 1];
        }
        diff[l] += x;
        if(r + 1 <= n)diff[r + 1] -= x;
        if(diff[l] < 0){
            temper += (long long)t * -diff[l];
        }
        else{
            temper += (long long)s * diff[l];
        }
        if(diff[r + 1] < 0){
            temper += (long long)t * -diff[r + 1];
        }
        else{
            temper += (long long)s * diff[r + 1];
        }
        cout << temper << '\n';
    }
}

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