Submission #273052

#	Time	Username	Problem	Language	Result	Execution time	Memory
273052		T0p_	Global Warming (NOI13_gw)	C++14	6 / 40	282 ms	17532 KiB

gw

#include<bits/stdc++.h>
using namespace std;

int n;
long long h[1001000];

int solve(long long x)
{
	bool ch = x < h[1];
	int ret = 0;
	for(int i=2 ; i<=n ; i++)
	{
		if(x < h[i]) ch = true;
		else
		{
			if(ch)
			{
				ch = false;
				ret++;
			}
		}
	}
	if(ch) ret++;
	return ret;
}

int main()
{
	scanf(" %d",&n);
	for(int i=1 ; i<=n ; i++)
		scanf(" %lld",&h[i]);
	long long l = 0, r = 2e9;
	while(l != r)
	{
		long long mid = (l+r)>>1;
		(solve(mid) >= solve(mid+1)) ? r = mid : l = mid+1;
	}
	printf("%d\n",solve(l));
	return 0;
}

Compilation message (stderr)

gw.cpp: In function 'int main()':
gw.cpp:29:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   29 |  scanf(" %d",&n);
      |  ~~~~~^~~~~~~~~~
gw.cpp:31:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   31 |   scanf(" %lld",&h[i]);
      |   ~~~~~^~~~~~~~~~~~~~~

• Subtask 1: 0 / 6
• Subtask 2: 6 / 6
• Subtask 3: 0 / 7
• Subtask 4: 0 / 10
• Subtask 5: 0 / 11