Submission #348831

#	Time	Username	Problem	Language	Result	Execution time	Memory
348831		dennisstar	Rail (IOI14_rail)	C++17	8 / 100	85 ms	876 KiB

rail

#include <bits/stdc++.h>
#include "rail.h"
#define gd getDistance
#define eb emplace_back

using namespace std;

void findLocation(int N, int first, int L[], int T[]) {
	T[0]=1;
	L[0]=0;
	
	vector<int> D(N), S;
	int mn=(1e9), mi;
	for (int i=1; i<N; i++) {
		D[i]=gd(0, i);
		if (mn>D[i]) mn=D[i], mi=i;
	}
	T[mi]=2;
	L[mi]=mn;

	int l=0, r=mi;
	for (int i=0; i<N; i++) if (i!=l&&i!=r) S.eb(i);
	sort(S.begin(), S.end(), [&](int x, int y) { return D[x]<D[y]; });
	for (auto &i:S) {
		int d1=gd(l, i), d2=gd(r, i);
		if (d1==d2+L[r]-L[l]) {
			L[i]=L[r]-d2;
			T[i]=1;
			if (L[i]<L[l]) l=i;
		}
		else if (d1+L[r]-L[l]==d2) {
			L[i]=L[l]+d1;
			T[i]=2;
			if (L[i]>L[r]) i=r;
		}
		else assert(false);
	}

	for (int i=0; i<N; i++) L[i]=L[i]+first;
}

Compilation message (stderr)

rail.cpp: In function 'void findLocation(int, int, int*, int*)':
rail.cpp:18:4: warning: 'mi' may be used uninitialized in this function [-Wmaybe-uninitialized]
   18 |  T[mi]=2;
      |    ^~

• Subtask 1: 8 / 8
• Subtask 2: 0 / 22
• Subtask 3: 0 / 26
• Subtask 4: 0 / 44