Submission #51341

#	Time	Username	Problem	Language	Result	Execution time	Memory
51341		Nicksechko	Money (IZhO17_money)	C++11	100 / 100	975 ms	57192 KiB

money

#include<bits/stdc++.h>

using namespace std;

typedef long long ll;

int n;
int ans = 0;
bitset<1000502> s;
ll a[1000500];
int t[4000500];
int p[1000500];
int sz = 1000001;

inline void upd(int v, int tl, int tr, int p)
{
	if(tl == tr)
	{
		t[v] = 1;
		return;
	}
	int tm = tl + tr >> 1;
	if(p <= tm) upd(v << 1, tl, tm, p);
	else upd((v << 1) + 1, tm + 1, tr, p);	
	t[v] = t[v << 1] + t[(v << 1) + 1];
}

inline int get(int v, int tl , int tr, int l, int r)
{
	if(l > r) return 0;
	if(tl == l && tr == r)
		return t[v];
	int tm = tl + tr >> 1;
	return get((v << 1), tl, tm, l, min(r, tm)) + get((v << 1) + 1, tm + 1, tr, max(tm + 1, l), r);
}

inline int fnd(int v, int tl, int tr, int need)
{
	if(tl == tr)
		return tl;
	int tm = tl + tr >> 1;
	if(need <= t[(v << 1)])
		return fnd((v << 1), tl, tm, need);
	else
		return fnd((v << 1) + 1, tm + 1, tr, need- t[(v << 1)]);
}

int main()
{
//	freopen("money.in", "r", stdin);
//	freopen("money.out", "w", stdout);
	scanf("%d", &n);
	for(int i = 1; i <= n; ++i)
		scanf("%lld", a + i);
	upd(1, 1, sz, sz);
	for(int i = 1; i <= n;)
	{
		int f = get(1, 1, sz, 1, a[i]) + 1;
		int nxt = fnd(1, 1, sz, f);
		ll last = a[i];
		while(i <= n && a[i] <= nxt && a[i] >= last)
			upd(1, 1, sz, a[i]), last = a[i], i++;
		ans++;
	}
	printf("%d\n", ans);
	return 0;
}

Compilation message (stderr)

money.cpp: In function 'void upd(int, int, int, int)':
money.cpp:22:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int tm = tl + tr >> 1;
           ~~~^~~~
money.cpp: In function 'int get(int, int, int, int, int)':
money.cpp:33:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int tm = tl + tr >> 1;
           ~~~^~~~
money.cpp: In function 'int fnd(int, int, int, int)':
money.cpp:41:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int tm = tl + tr >> 1;
           ~~~^~~~
money.cpp: In function 'int main()':
money.cpp:52:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ~~~~~^~~~~~~~~~
money.cpp:54:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld", a + i);
   ~~~~~^~~~~~~~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 16 / 16
• Subtask 3: 20 / 20
• Subtask 4: 55 / 55