Submission #406753

#	Time	Username	Problem	Language	Result	Execution time	Memory
406753		Maqsut_03	Swapping Cities (APIO20_swap)	C++14	13 / 100	161 ms	18916 KiB

swap

#include "swap.h"
#include <bits/stdc++.h>

#define ll int
#define pl pair<ll, ll>
#define llv vector<ll>
#define pv vector<pl>
#define pb push_back
#define ppb(x, y) push_back({x, y})
#define ff first
#define ss second
#define sz size()
using namespace std;
const int NN = 2 * 1e5 + 3, MOD = 1e9 + 7;

pl u0[NN];
pv v[NN];
ll n, m, k, d, u[NN];
bool f, f1, f2, f3;

void init(int N, int M, vector<int> U, vector<int> V, vector<int> W) 
{
	n = N;
	m = M;
	for (int i=0; i<m; i++)
	{
		v[V[i]].ppb(U[i], W[i]);
		v[U[i]].ppb(V[i], W[i]);
		k = max(k, W[i]);
		
		u0[i] = {W[i], V[i]};
	}
	sort(u0, u0 + m);
	for (int i=0; i<m; i++) u[u0[i].ss] = u0[i].ff;
	d = u0[2].ff;
	int p = 0, q = 0;
	for (int i=0; i<n; i++)
	{
		if (v[i].sz == 1) q++;
		if (v[i].sz == 2) p++;
	}
	if (q == 2 && q + p == n) f = 1;
	
	if (m == n - 1 && v[0].sz == m) f1 = 1;
	f2 = 1;
	for (int i=0; i<n; i++)
	{
		if(v[i].sz != 2)
		{
			f2 = 0;
			break;
		}
	}
	return ;
}

int getMinimumFuelCapacity(int X, int Y) 
{
	if (f) return -1;
	if (f2) return k;
	if (f1) return max({d, u[X], u[Y]});
}

Compilation message (stderr)

swap.cpp: In function 'void init(int, int, std::vector<int>, std::vector<int>, std::vector<int>)':
swap.cpp:44:28: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   44 |  if (m == n - 1 && v[0].sz == m) f1 = 1;
      |                    ~~~~~~~~^~~~
swap.cpp: In function 'int getMinimumFuelCapacity(int, int)':
swap.cpp:62:1: warning: control reaches end of non-void function [-Wreturn-type]
   62 | }
      | ^

• Subtask 1: 6 / 6
• Subtask 2: 7 / 7
• Subtask 3: 0 / 17
• Subtask 4: 0 / 20
• Subtask 5: 0 / 23
• Subtask 6: 0 / 27