Submission #1006389

#	Time	Username	Problem	Language	Result	Execution time	Memory
1006389		AdamGS	Minerals (JOI19_minerals)	C++17	90 / 100	295 ms	3812 KiB

minerals

#include "minerals.h"
#include<bits/stdc++.h>
using namespace std;
#define rep(a, b) for(int a = 0; a < (b); ++a)
#define st first
#define nd second
#define pb push_back
#define all(a) a.begin(), a.end()
const int LIM=5e4+7, INF=1e9+7, C=3000;
int czy[2*LIM], lst=-1;
pair<int,int>dp[LIM];
bool pytaj(int x) {
	czy[x]^=1;
	int a=Query(x+1);
	swap(a, lst);
	return a!=lst;
}
void dc(vector<int>&X, vector<int>&Y) {
	if(X.size()==1) {
		Answer(X[0]+1, Y[0]+1);
		return;
	}
	if(X.size()==2) {
		pytaj(X[0]);
		if(czy[X[0]]) swap(X[0], X[1]);
		if(!pytaj(Y[0])) swap(Y[0], Y[1]);
		Answer(X[0]+1, Y[0]+1);
		Answer(X[1]+1, Y[1]+1);
		return;
	}
	vector<int>AX, AY, BX, BY;
	rep(i, dp[X.size()].nd) {
		pytaj(X[i]);
		AX.pb(X[i]);
	}
	for(int i=dp[X.size()].nd; i<X.size(); ++i) BX.pb(X[i]);
	for(auto i : Y) if(czy[X[0]]==pytaj(i)) BY.pb(i); else AY.pb(i);
	dc(AX, AY);
	dc(BX, BY);
}
void Solve(int n) {
	dp[2]={2, 0};
	for(int i=3; i<=n; ++i) {
		dp[i]={INF, INF};
		for(int k=max(i/2-C, 1); k<min(i, i/2+C); ++k) dp[i]=min(dp[i], {i+k+dp[k].st+dp[i-k].st, k});
	}
	vector<int>X, Y;
	rep(i, 2*n) {
		if(pytaj(i)) X.pb(i);
		else Y.pb(i);
	}
	dc(X, Y);
}

Compilation message (stderr)

minerals.cpp: In function 'void dc(std::vector<int>&, std::vector<int>&)':
minerals.cpp:36:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |  for(int i=dp[X.size()].nd; i<X.size(); ++i) BX.pb(X[i]);
      |                             ~^~~~~~~~~

• Subtask 1: 6 / 6
• Subtask 2: 25 / 25
• Subtask 3: 9 / 9
• Subtask 4: 30 / 30
• Subtask 5: 5 / 5
• Subtask 6: 5 / 5
• Subtask 7: 5 / 5
• Subtask 8: 5 / 5
• Subtask 9: 0 / 10