Submission #857033

#	Time	Username	Problem	Language	Result	Execution time	Memory
857033		arashMLG	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	448 ms	17748 KiB

foehn_phenomena

#include<bits/stdc++.h>
#ifdef LOCAL
#include "Essentials/algo/debug.h"
#else
#define debug(...) 69
#endif
using namespace std;

//#pragma GCC optimize("O3,unroll-loops")
//#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

//https://quera.org/profile/4dykhk

typedef long long     ll;
typedef long double   ldb;
typedef pair<int,int> pii;
typedef pair<ll,ll>   pll;

const int N = 2e5 + 23;
const int sq = 450;
const ll mod = 1e9+7; // 998244353
const int LOG = 23;
const ll inf = 1e18;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

#define F           first
#define S           second
#define pb          push_back
#define ms(x,y)     memset((x) , (y) , sizeof (x))
#define done        return cout<<endl , 0;
#define kill(x)     cout<<x<<endl, exit(0);
#define isIn(x,s,e) ((x) >= (s) && (x) <= e)
#define all(x)      x.begin(),x.end()
#define sz(x)       (int)x.size()
#define pc(x)       __builtin_popcount(x)
#define ctz(x)      __builtin_ctz(x)
#define MinHeap(x)  priority_queue<x, vector<x> , greater<x> >
#define MaxHeap(x)  priority_queue<x, vector<x>>
#define lc          (v << 1)
#define rc          ((v<<1) |1)
#define int      ll

ll pw(ll a, ll b, ll md = mod){ll res = 1; while(b){if(b&1){res=(a*res)%md;}a=(a*a)%md;b>>=1;}return(res);}

int n;
int a[N];
int t[N<<2];

void build(int v=1,int tl=0,int tr=n+1) {
	if(tr-tl ==1) {
		t[v] = a[tl];
		return;
	}
	int mid=(tl+tr)/2;
	build(lc,tl,mid);
	build(rc,mid,tr);
}

void shift(int v) {
	if(t[v] == 0) return;
	t[lc] += t[v];
	t[rc] += t[v];
	t[v] = 0;
}

void upd(int l,int r,int x,int v =1,int tl = 0 ,int tr = n+1) {
	if(l > r) return;
	if(l == tl && r == tr-1) {
		t[v] += x;
		return;
	}
	shift(v);
	int mid=(tl+tr)/2;
	upd(l,min(mid-1,r),x,lc,tl,mid);
	upd(max(l,mid),r,x,rc,mid,tr);
}

int get(int pos,int v=1,int tl = 0, int tr =n+1) {
	if(tr-tl ==1) return t[v];
	shift(v);
	int mid=(tl+tr)/2;
	if(pos<mid)
		return get(pos,lc,tl,mid);
	else
		return get(pos,rc,mid,tr);
}

/*void print(__int128_t x) {
	string s;
	while(x > 0) {
		s.pb(x%10 + '0');
		x/=10;
	}
	if(sz(s) ==0) s.pb('0');
	reverse(all(s));
	cout<<s<<'\n';
}*/

int q,s,l;

int val(int i) {
	if(i == n) return 0;
	if(get(i) < get(i+1)) {
		return -(get(i+1)-get(i))*s;
	} else {
		return (get(i) - get(i+1))*l;
	}
}


int32_t main() {
    cin.tie(nullptr)->sync_with_stdio(false);
	cin>>n>>q>>s>>l;
	for(int i = 0; i <= n ;i ++) cin>>a[i];
	
	build();
	int sum =0;
	for(int i = 0 ; i < n; i ++) {
		if(a[i] < a[i+1]) {
			sum -= (a[i+1]-a[i])*s;
		} else {
			sum += (a[i] - a[i+1])*l;
		}
	}
	debug(sum);
	while(q--) {
		int l,r,x; cin>>l>>r>>x;
		sum -= val(l-1);
		sum -= val(r);
		debug(val(l-1),val(r));
		upd(l,r,x);
		sum += val(l-1);
		sum += val(r);
		cout<<sum << '\n';
	}
    done;
}

Compilation message (stderr)

foehn_phenomena.cpp: In function 'int32_t main()':
foehn_phenomena.cpp:5:20: warning: statement has no effect [-Wunused-value]
    5 | #define debug(...) 69
      |                    ^~
foehn_phenomena.cpp:126:2: note: in expansion of macro 'debug'
  126 |  debug(sum);
      |  ^~~~~
foehn_phenomena.cpp:5:20: warning: statement has no effect [-Wunused-value]
    5 | #define debug(...) 69
      |                    ^~
foehn_phenomena.cpp:131:3: note: in expansion of macro 'debug'
  131 |   debug(val(l-1),val(r));
      |   ^~~~~

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