Submission #569763

#	Time	Username	Problem	Language	Result	Execution time	Memory
569763		sumit_kk10	Swapping Cities (APIO20_swap)	C++17	13 / 100	121 ms	33508 KiB

swap

#include "swap.h"
#include<bits/stdc++.h>
#include <vector>
#define pb push_back
using namespace std;
const int N = 1e6 + 5;
vector<pair<int, int> > g[N];
int mx, n, m;
bool sb2 = 1;

void init(int N, int M,
          std::vector<int> U, std::vector<int> V, std::vector<int> W) {
	n = N;
	m = M;
	for(int i = 0; i < M; ++i){
		int u = U[i], v = V[i], w = W[i];
		if(u != 0 and v != 0)
			sb2 = false;
		g[u].pb({w, v});
		g[v].pb({w, u});
		mx = max(mx, w);
	}
	for(int i = 0; i < n; ++i)
		sort(g[i].begin(), g[i].end());
}
 
int getMinimumFuelCapacity(int X, int Y) {
	if(sb2 and m == n - 1){
		if(n <= 3) return -1;
		if(X == 0){
			int x = g[Y][0].first, xx, dest, mn;
			if(g[0][0].second != Y){
				xx = g[0][0].first;
				dest = g[0][0].second;
			}else{
				xx = g[0][1].first;
				dest = g[0][1].second;
			}
			if(g[0][1].second != Y and g[0][1].second != dest)
				mn = g[0][1].first;
			else
				mn = g[0][2].first;
			return max({x, xx, mn});
		}
		int x = g[X][0].first, xx = g[Y][0].first, mn;
		if(g[0][0].second != X and g[0][0].second != Y)
			mn = g[0][0].first;
		else if(g[0][1].second != X and g[0][1].second != Y)
			mn = g[0][1].first;
		else
			mn = g[0][2].first;
		return max({x, xx, mn});
	}
	if(m == n - 1)
		return -1;
	else
		return mx;
}

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