Submission #220578

#	Time	Username	Problem	Language	Result	Execution time	Memory
220578		kshitij_sodani	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	559 ms	8952 KiB

foehn_phenomena

#include <algorithm>
#include <cassert>
#include <cstring>
#include <iostream>
/*
#include <chrono>
#include <cmath>
#include <complex>
#include <cstdio>
#include <cstdlib>
#include <ctime>

#include <functional>
#include <iomanip>
#include <iterator>
#include <limits>
#include <list>
#include <numeric>
#include <random>
#include <ratio>
#include <sstream>
#include <utility>

#include <bitset>
#include <deque>
#include <queue>
#include <map>
#include <vector>
#include <unordered_map>
#include <unordered_set>
#include <stack>
#include <string>
#include <set>*/

using namespace std;
#define a first
#define b second
#define pb push_back
typedef long long llo;
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	llo n,q,s,t;
	cin>>n>>q>>s>>t;
	n+=1;
	llo aa[n];
	llo tot=0;
	llo bb[n][2];

	for(llo i=0;i<n;i++){
		cin>>aa[i];
		bb[i][0]=0;
		bb[i][1]=0;
		if(i>0){
			if(aa[i]>aa[i-1]){
				tot-=s*abs(aa[i]-aa[i-1]);
			}
			else{
				tot+=t*abs(aa[i]-aa[i-1]);
			}
		}
	}
//	cout<<tot<<endl;


	for(llo i=0;i<q;i++){
		llo l,r,x;
		cin>>l>>r>>x;
		if(l>0){
			if(aa[l]+bb[l-1][1]<bb[l][0]+aa[l-1]){
				tot-=t*(abs(aa[l]+bb[l-1][1]-(bb[l][0]+aa[l-1])));
			}
			else{
				tot+=s*(abs(aa[l]+bb[l-1][1]-(bb[l][0]+aa[l-1])));
			}
			bb[l-1][1]+=x;
			if(aa[l]+bb[l-1][1]<bb[l][0]+aa[l-1]){
				tot+=t*(abs(aa[l]+bb[l-1][1]-(bb[l][0]+aa[l-1])));
			}
			else{
				tot-=s*(abs(aa[l]+bb[l-1][1]-(bb[l][0]+aa[l-1])));
			}
		}
		if(r<n-1){
			if(aa[r]+bb[r+1][0]<bb[r][1]+aa[r+1]){
				tot+=s*(abs(aa[r]+bb[r+1][0]-(bb[r][1]+aa[r+1])));
			}
			else{
				tot-=t*(abs(aa[r]+bb[r+1][0]-(bb[r][1]+aa[r+1])));
			}
			bb[r+1][0]+=x;
			if(aa[r]+bb[r+1][0]<bb[r][1]+aa[r+1]){
				tot-=s*(abs(aa[r]+bb[r+1][0]-(bb[r][1]+aa[r+1])));
			}
			else{
				tot+=t*(abs(aa[r]+bb[r+1][0]-(bb[r][1]+aa[r+1])));
			}
		}
		cout<<tot<<endl;
	}

	return 0;
}

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