Submission #38039

#	Time	Username	Problem	Language	Result	Execution time	Memory
38039		MatheusLealV	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	0 / 100	0 ms	2192 KiB

foehn_phenomena

#include <bits/stdc++.h>
#define inf 2000000000
#define N 2050
using namespace std;

int n, q, S, T, A[N], bit[N], ans;

void upd(int l, int r, int x)
{
	if(1 <= l && l <= n + 1) for(int i = l; i < N; i += (i&-i)) bit[i] += x;

	if(1 <= r && r <= n + 1) for(int i = r + 1; i < N; i += (i&-i)) bit[i] -= x;
}

int query(int x)
{
	int aux = 0;

	if(x <= 0 || x > n + 1) return inf;

	for(int i = x; i > 0; i -= (i&-i)) aux += bit[i];

	return aux;
}

 main()
{
	ios::sync_with_stdio(false); cin.tie(0);

	cin>>n>>q>>S>>T;

	for(int i = 1; i <= n + 1; i++) cin>>A[i], upd(i, i, A[i]);

	for(int i = 1; i <= n; i++) ans += (A[i] <= A[i + 1] ? (- A[i + 1] + A[i])*S : (A[i] - A[i + 1])*T);

	for(int i = 1; i <= q; i++)
	{
		int li, ri, xi;

		cin>>li>>ri>>xi;

		li ++, ri ++;

		int Hl = query(li);

		int Hr = query(ri);

		int H_depois = query(ri + 1);

		int H_antes = query(li - 1);

		upd(li, ri, xi);

		int dl = 0, dr = 0;

		if(H_antes != inf && H_antes <= Hl) dl -= abs(Hl - H_antes)*S ;

		else if(H_antes  != inf) dl += abs(Hl - H_antes)*T;

		if(Hr <= H_depois && H_depois != inf) dr -= abs(H_depois - Hr)*S ;

		else if(H_depois != inf) dr += abs(H_depois - Hr)*T;

		ans = ans - dl - dr;

		//cout<<"H :: "<<H_antes<<" "<<H_depois<<"\n";

		//cout<<"DIMINUINDO "<<dl<<" "<<dr<<"\n";

		Hl += xi, Hr += xi;

		dl = 0, dr = 0;

		if(H_antes <= Hl&& H_antes != inf) dl -= abs(Hl - H_antes)*S ;

		else if(H_antes != inf) dl += abs(Hl - H_antes)*T;

		if(Hr <= H_depois && H_depois != inf) dr -= abs(H_depois - Hr)*S ;

		else if(H_depois != inf) dr += abs(H_depois - Hr)*T;

		ans += dl + dr;

		//cout<<"ADICIONANDO "<<dl<<" "<<dr<<"\n";

		cout<<ans<<"\n";
	}
}

Compilation message (stderr)

foehn_phenomena.cpp:26:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  main()
       ^

• Subtask 1: 0 / 30
• Subtask 2: 0 / 10
• Subtask 3: 0 / 60