Submission #692029

#	Time	Username	Problem	Language	Result	Execution time	Memory
692029		Cookie197	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	159 ms	13136 KiB

foehn_phenomena

#include<iostream>
#include<vector>
#include<algorithm>
#include<map>
#include<set>
using namespace std;
#define ll long long
#define pii pair<ll,ll>
#define endl "\n"
#define out(x) cout<< #x << " = " << x << endl

int n,q; ll s,t;
ll arr[200005], diff[200005], ans;
signed main(){
    ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    cin>>n>>q>>s>>t;
    for (int i=0;i<=n;i++) cin>>arr[i];
    for (int i=1;i<=n;i++) {
        diff[i] = arr[i] - arr[i-1];
        if (diff[i] > 0) ans -= s*diff[i];
        else ans -= t*diff[i];
    }
    //out(ans);
    
    while(q--){
        int i,j; ll x; cin>>i>>j>>x;
        if (diff[i] > 0) ans += s*diff[i];
        else ans += t*diff[i];
        if (j!=n){
            if (diff[j+1] > 0) ans += s*diff[j+1];
            else ans += t*diff[j+1];
        }

        diff[i] += x; diff[j+1] -= x;

        if (diff[i] > 0) ans -= s*diff[i];
        else ans -= t*diff[i];
        if (j!=n){
            if (diff[j+1] > 0) ans -= s*diff[j+1];
            else ans -= t*diff[j+1];
        }

        //cout<<"#";
        cout<<ans<<endl;
    }
}

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