Submission #259052

#	Time	Username	Problem	Language	Result	Execution time	Memory
259052		Fidisk	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	100 / 100	149 ms	13296 KiB

foehn_phenomena

#include <bits/stdc++.h>
using namespace std;

#define oo 1e9
#define fi first
#define se second
#define sp(iiii) setprecision(iiii)
#define IO ios_base::sync_with_stdio(false); cin.tie(0)
#define ms(aaaa,xxxx) memset(aaaa,xxxx,sizeof(aaaa))
#define cntbit(xxxx) __builtin_popcount(xxxx)
#define getbit(xxxx,aaaa) ((xxxx>>(aaaa-1))&1)
#define _cos(xxxx) cos(xxxx*acos(-1)/180)
#define _sin(xxxx) sin(xxxx*acos(-1)/180)
#define _tan(xxxx) tan(xxxx*acos(-1)/180)
#define PE cout<<fixed

typedef long double ld;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef pair<pair<int,int>,int> piii;
typedef pair<long long,long long> pll;
typedef pair<pair<long long,long long>,long long> plll;

const ld pi=acos(-1);

ll n,q,s,t,i,a[500009],b[500009],res,l,r,x,tmp1,tmp2;

int main(){
    IO;
    cin>>n>>q>>s>>t;
    for (i=0;i<=n;i++) {
        cin>>a[i];
    }
    for (i=1;i<=n;i++) {
        b[i]=a[i]-a[i-1];
    }
    for (i=1;i<=n;i++) {
        res+=(b[i]>0)?(-b[i]*s):(-b[i]*t);
    }
    //cout<<res<<'\n';
    for (i=1;i<=q;i++) {
        cin>>l>>r>>x;
        tmp1=b[l]+x;
        tmp2=b[r+1]-x;
        res+=(b[l]>0)?(b[l]*s):(b[l]*t);
        res+=(tmp1>0)?(-tmp1*s):(-tmp1*t);
        if (r!=n) {
            res+=(b[r+1]>0)?(b[r+1]*s):(b[r+1]*t);
            res+=(tmp2>0)?(-tmp2*s):(-tmp2*t);
        }
        b[l]=tmp1;
        b[r+1]=tmp2;
        cout<<res<<'\n';
    }
}
 

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