Submission #321649

#	Time	Username	Problem	Language	Result	Execution time	Memory
321649		Kevin_Zhang_TW	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	529 ms	57068 KiB

foehn_phenomena

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define pb emplace_back
//#undef KEV
#ifdef KEV
#define DE(args...) kout("[ " + string(#args) + " ] = ", args)
void kout() { cerr << endl; }
template <class T, class ...U> 
void kout(T a, U ...b) { cerr << a << ' ', kout(b...); }
template <class T>
void debug(T l, T r) { while (l != r) cerr << *l << " \n"[next(l) == r], ++l; }
#else
#define DE(...) 0
#define debug(...) 0
#endif
template <class T>
bool chmin(T &a, T b) { return b < a ? (a = b, true) : false; }
template <class T>
bool chmax(T &a, T b) { return a < b ? (a = b, true) : false; }

const int MAX_N = 200010;
const ll inf = 1ll << 58;
#define int ll
int n, q, s, t;
struct node {
	ll lh, rh, sum, tg;
	node(ll v) : 
		lh(v), rh(v), sum(0), tg(0) {}
	node(node a, node b) :
		lh(a.lh), rh(b.rh), sum(a.sum + b.sum + (a.rh < b.lh ? (a.rh - b.lh) * s : (a.rh - b.lh) * t)), 
			   	tg(0) {}
	node() :
		lh(0), rh(0), sum(0), tg(0) {}
	void operator += (int val) {
		lh += val, rh += val, tg += val;
	}
	void dbg() {
		//DE(lh, rh, sum);
	}
}val[MAX_N << 3];

int a[MAX_N];

void push(int i, int l, int r) {
	if (l == r || val[i].tg == 0) return;
	int m = l + r >> 1;
	val[i<<1] += val[i].tg, val[i<<1|1] += val[i].tg;
	val[i].tg = 0;
}
void update(int i, int l, int r) {
	if (l == r) return;
	push(i, l, r);
	val[i] = node(val[i<<1], val[i<<1|1]);
}

void modify(int ml, int mr, int nv, int l = 0, int r = n, int i = 1) {
	if (ml > r || mr < l) return;
	assert(l <= r);
	push(i, l, r);
	if (ml <= l && mr >= r) {
		val[i] += nv;
		return;
	}
	int m = l + r >> 1;
	modify(ml, mr, nv, l, m, i<<1);
	modify(ml, mr, nv,m+1,r, i<<1|1);

	val[i] = node(val[i<<1], val[i<<1|1]);

	DE(l, r);
	val[i].dbg();
}
ll qry() {
	val[1].dbg();
	//cerr << '\n';
	return val[1].sum;
}
void init() {
	debug(a, a+n+1);
	for (int i = 0;i <= n;++i)
		modify(i, i, a[i]);
	cerr << "Init done\n";
}
void solve() {
	while (q--) {
		int l, r, x;
		cin >> l >> r >> x;
		modify(l, r, x);
		cout << qry() << '\n';
	}
}
int32_t main() {
	ios_base::sync_with_stdio(0), cin.tie(0);
	cin >> n >> q >> s >> t;
	for (int i = 0;i <= n;++i)
		cin >> a[i];

	init();
	solve();
}

Compilation message (stderr)

foehn_phenomena.cpp: In function 'void push(ll, ll, ll)':
foehn_phenomena.cpp:47:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   47 |  int m = l + r >> 1;
      |          ~~^~~
foehn_phenomena.cpp:47:6: warning: unused variable 'm' [-Wunused-variable]
   47 |  int m = l + r >> 1;
      |      ^
foehn_phenomena.cpp: In function 'void modify(ll, ll, ll, ll, ll, ll)':
foehn_phenomena.cpp:65:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   65 |  int m = l + r >> 1;
      |          ~~^~~
foehn_phenomena.cpp:14:17: warning: statement has no effect [-Wunused-value]
   14 | #define DE(...) 0
      |                 ^
foehn_phenomena.cpp:71:2: note: in expansion of macro 'DE'
   71 |  DE(l, r);
      |  ^~
foehn_phenomena.cpp: In function 'void init()':
foehn_phenomena.cpp:15:20: warning: statement has no effect [-Wunused-value]
   15 | #define debug(...) 0
      |                    ^
foehn_phenomena.cpp:80:2: note: in expansion of macro 'debug'
   80 |  debug(a, a+n+1);
      |  ^~~~~

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