Submission #99016

#	Time	Username	Problem	Language	Result	Execution time	Memory
99016		kriii	Exhibition (JOI19_ho_t2)	C++17	100 / 100	121 ms	1912 KiB

joi2019_ho_t2

#include <stdio.h>
#include <algorithm>
using namespace std;

int N,M,C;
pair<int, int> pic[100100];
int sz[100100],bit[100100];

int out(int x)
{
	int r = 0;
	while (x){
		r = max(r,bit[x]);
		x -= x & (-x);
	}
	return r;
}

void in(int x, int p)
{
	while (x <= C){
		bit[x] = max(bit[x],p);
		x += x & (-x);
	}
}

int main()
{
	scanf ("%d %d",&N,&M);
	for (int i=0;i<N;i++){
		scanf ("%d %d",&pic[i].second,&pic[i].first);
	}
	sort(pic,pic+N);
	reverse(pic,pic+N);
	for (int i=0;i<N;i++){
		int x = C + 1;
		if (pic[i].first != pic[i+1].first) C++;
		pic[i].first = x;
	}
	for (int i=0;i<M;i++) scanf ("%d",&sz[i]);
	sort(sz,sz+M);

	for (int i=0;i<N;i++){
		int u = out(pic[i].first) + 1;
		int v = M - (lower_bound(sz,sz+M,pic[i].second) - sz);
		in(pic[i].first,min(u,v));
	}
	printf ("%d\n",out(C));

	return 0;
}

Compilation message (stderr)

joi2019_ho_t3.cpp: In function 'int main()':
joi2019_ho_t3.cpp:29:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf ("%d %d",&N,&M);
  ~~~~~~^~~~~~~~~~~~~~~
joi2019_ho_t3.cpp:31:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf ("%d %d",&pic[i].second,&pic[i].first);
   ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
joi2019_ho_t3.cpp:40:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for (int i=0;i<M;i++) scanf ("%d",&sz[i]);
                        ~~~~~~^~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 40 / 40
• Subtask 3: 50 / 50