Submission #121270

#	Time	Username	Problem	Language	Result	Execution time	Memory
121270		onjo0127	Exhibition (JOI19_ho_t2)	C++11	100 / 100	342 ms	10328 KiB

joi2019_ho_t2

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

vector<int> T[100009];
int S[100009], V[100009], C[100009];

int main() {
	int N, M; scanf("%d%d",&N,&M);
	for(int i=1; i<=N; i++) scanf("%d%d",&S[i],&V[i]);
	for(int i=1; i<=M; i++) scanf("%d",&C[i]);
	sort(C+1, C+M+1);
	for(int i=1; i<=N; i++) {
		S[i] = lower_bound(C+1, C+M+1, S[i]) - C;
		if(S[i] <= M) T[S[i]].push_back(i);
	}
	int l = 0, r = M;
	while(l <= r) {
		bool f = 1;
		int m = l+r >> 1, p = -1e9;
		priority_queue<int> pq;
		for(int i=1; i<=M; i++) {
			for(auto &it: T[i]) pq.push(-V[it]);
			if(M-i+1 <= m) {
				while(pq.size() && p > -pq.top()) pq.pop();
				if(pq.size() == 0) {f = 0; break;}
				p = -pq.top();
				pq.pop();
			}
		}
		if(f) l = m+1;
		else r = m-1;
	}
	printf("%d", l-1);
	return 0;
}

Compilation message (stderr)

joi2019_ho_t2.cpp: In function 'int main()':
joi2019_ho_t2.cpp:19:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int m = l+r >> 1, p = -1e9;
           ~^~
joi2019_ho_t2.cpp:8:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  int N, M; scanf("%d%d",&N,&M);
            ~~~~~^~~~~~~~~~~~~~
joi2019_ho_t2.cpp:9:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=1; i<=N; i++) scanf("%d%d",&S[i],&V[i]);
                          ~~~~~^~~~~~~~~~~~~~~~~~~~
joi2019_ho_t2.cpp:10:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=1; i<=M; i++) scanf("%d",&C[i]);
                          ~~~~~^~~~~~~~~~~~

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