Submission #68237

#	Time	Username	Problem	Language	Result	Execution time	Memory
68237		Windazz	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	100 / 100	512 ms	7496 KiB

foehn_phenomena

#include <iostream>
#include <fstream>
#include <cstring>
#include <sstream>
#include <algorithm>
#include <cmath>
#include <iomanip>
#include <vector>
#include <stack>
#include <queue>
#include <deque>
#include <map>
#include <set>
#include <iterator>
#include <ext/pb_ds/assoc_container.hpp>

#define x first
#define y second
#define mp make_pair
#define up_b upper_bound
#define low_b lower_bound
#define sz(x) (int)x.size()
#define bit __builtin_popcount
#define all(x) x.begin(),x.end()

using namespace std;
using namespace __gnu_pbds;

typedef long long ll;
typedef long double ld;
typedef pair<ll,ll> pll;
typedef pair<int,int> pii;
typedef pair<int,ll> pil;
typedef pair<ll,int> pli;
typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> indexed_set;

const ll INF=1e18+123;
const ld EPS=1e-9;
const int inf=1e9+123;
const int MOD=1e9+7;
const int N=2e5+123;
const int dx[]={0ll,0ll,1,-1};
const int dy[]={1,-1,0ll,0ll};

ll a[N],x[N];

int main(){
    ios_base::sync_with_stdio(0ll);
    cin.tie(0ll);
    int n,q;
    ll s,t;
    cin>>n>>q>>s>>t;
    ll ans=0ll;
    cin>>a[0ll];
    for(int i=1;i<=n;i++){
        cin>>a[i];
        x[i]=-a[i]+a[i-1];
        ans+=1ll*s*min(x[i],0ll);
        ans+=1ll*t*max(x[i],0ll);
    }
    int l,r,c;
    while(q--){
        cin>>l>>r>>c;
        r++;
        if(l<=n){
            ans-=s*min(x[l],0ll);
            ans-=t*max(x[l],0ll);
            x[l]-=c;
            ans+=s*min(x[l],0ll);
            ans+=t*max(x[l],0ll);
        }
        if(r<=n){
            ans-=s*min(x[r],0ll);
            ans-=t*max(x[r],0ll);
            x[r]+=c;
            ans+=s*min(x[r],0ll);
            ans+=t*max(x[r],0ll);
        }
        cout<<ans<<endl;
    }
    return 0ll;
}

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