Submission #399116

#	Time	Username	Problem	Language	Result	Execution time	Memory
399116		Antekb	버섯 세기 (IOI20_mushrooms)	C++14	80.43 / 100	13 ms	456 KiB

mushrooms

#include "mushrooms.h"
#include<bits/stdc++.h>
#define st first
#define nd second
#define pb(x) push_back(x)
using namespace std;
int count_mushrooms(int n) {
	vector<int> A, B, C(n-1);
	A.pb(0);
	iota(C.begin(), C.end(), 1);
	int k=141;
	for(int i=0; i<2 && C.size(); i++){
		int c1 = use_machine({0, C.back()});
		if(c1==1)B.pb(C.back());
		else A.pb(C.back());
		C.pop_back();
	}
	bool swa=0;
	if(A.size()<B.size()){
		swap(A, B);
		swa=1;
	}
	for(int i=0; i<n/max(A.size(), B.size()) && C.size()>1; i++){
		int c1 = use_machine({A[0], C.back(), A[1], C[C.size()-2]});
		if(c1>=2)B.pb(C.back());
		else A.pb(C.back());
		C.pop_back();
		if(c1&1)B.pb(C.back());
		else A.pb(C.back());
		C.pop_back();
	}
	if(A.size()<B.size()){
		swap(A, B);
		swa^=1;
	}
	int a=A.size(),b=B.size();
	while(C.size()){
		int t=min(A.size(), C.size());
		vector<int> V;
		for(int i=0; i<t; i++){
			V.pb(A[i]);
			V.pb(C.back());
			C.pop_back();
		}
		int c=use_machine(V);
		b+=(c+1)/2;
		a+=t-(c+1)/2;
	}
	if(swa)swap(a, b);
	return a;
}

Compilation message (stderr)

mushrooms.cpp: In function 'int count_mushrooms(int)':
mushrooms.cpp:23:16: warning: comparison of integer expressions of different signedness: 'int' and 'long unsigned int' [-Wsign-compare]
   23 |  for(int i=0; i<n/max(A.size(), B.size()) && C.size()>1; i++){
      |               ~^~~~~~~~~~~~~~~~~~~~~~~~~~
mushrooms.cpp:11:6: warning: unused variable 'k' [-Wunused-variable]
   11 |  int k=141;
      |      ^

• Subtask 1: 80.427 / 100