Submission #548343

#	Time	Username	Problem	Language	Result	Execution time	Memory
548343		ToroTN	Swapping Cities (APIO20_swap)	C++14	0 / 100	123 ms	13032 KiB

swap

#include<bits/stdc++.h>
using namespace std;
#include "swap.h"
#define X first
#define Y second
#define pb push_back

#include <vector>
int n,m,dg[100005],u_i,v_i,w_i,x,y,type=-1,flag=-1;
int node,w,deter=2;
vector<pair<int,int> > g[100005];
vector<pair<int,pair<int,int> > > v;

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++)
    {
        u_i=U[i]+1;
        v_i=V[i]+1;
        w_i=W[i];
        g[u_i].pb({v_i,w_i});
        g[v_i].pb({u_i,w_i});
        ++dg[u_i];
        ++dg[v_i];
        v.push_back({-w_i,{u_i,v_i}});
        if(u_i!=1)flag=0;
    }
    sort(v.begin(),v.end());
    for(int i=1;i<=n;i++)
    {
        if(dg[i]>2)
        {
            type=0;
        }
    }
    if(type==-1)
    {
        deter=0;
        for(int i=1;i<=n;i++)if(dg[i]!=2)deter=-1;
    }
}

int getMinimumFuelCapacity(int X, int Y)
{
    x=X+1;
    y=Y+1;
    if(type==-1)
    {
        if(deter==0)return v[v.size()-1].X;
        return -1;
    }
    if(m==n-1&&flag==-1)
    {
        if(x==1)return -1;
        if(n<=3)return -1;
        if(x==v[0].Y.Y&&y==v[1].Y.Y||x==v[1].Y.Y&&y==v[0].Y.Y)
        {
            return -v[2].X;
        }
        return max(g[x][0].Y,g[y][0].Y);
    }
}

Compilation message (stderr)

swap.cpp: In function 'int getMinimumFuelCapacity(int, int)':
swap.cpp:59:23: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   59 |         if(x==v[0].Y.Y&&y==v[1].Y.Y||x==v[1].Y.Y&&y==v[0].Y.Y)
      |                       ^
swap.cpp:65:1: warning: control reaches end of non-void function [-Wreturn-type]
   65 | }
      | ^

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