Submission #81116

#	Time	Username	Problem	Language	Result	Execution time	Memory
81116		ToadDaveski	Evacuation plan (IZhO18_plan)	C++14	0 / 100	427 ms	15488 KiB

plan

#include <bits/stdc++.h>
#define ll long long
#define fr first
#define sc second
using namespace std;
vector <pair <ll,ll> > v[100001];
ll dp[100001];
priority_queue <pair <ll,ll> > q;
int main()
{
    ll n,m,Q,k,i,j;
    cin>>n>>m;
    for(i=1;i<=n;i++)
        dp[i]=1e9;
    for(i=1;i<=m;i++)
    {
        ll x,y,z;
        cin>>x>>y>>z;
        v[x].push_back({y,z});
        v[y].push_back({x,z});
    }
    cin>>k;
    for(i=1;i<=k;i++)
    {
        ll x,y;
        cin>>x;
        q.push({0,x});
        dp[x]=0;
    }
    while(!q.empty())
    {
        ll from=q.top().sc;
        ll weight=-q.top().fr;
        q.pop();
        if (dp[from]<weight)
            continue;
        for(auto to : v[from])
        {
            if (dp[to.fr]>dp[from]+to.sc)
            {
                dp[to.fr]=dp[from]+to.sc;
                q.push({-(dp[from]+to.sc),to.fr});
            }
        }
    }
    /*for(i=1;i<=n;i++)
    cout<<dp[i]<<" ";
    return 0;*/
    cin>>Q;
    for(i=1;i<=Q;i++)
    {
        ll x,y;
        cin>>x>>y;
        cout<<max(dp[x],dp[y])<<endl;
    }
    return 0;
}
/*
9 12
1 9 4
1 2 5
2 3 7
2 4 3
4 3 6
3 6 4
8 7 10
6 7 5
5 8 1
9 5 7
5 4 12
6 8 2
2
4 7


*/

Compilation message (stderr)

plan.cpp: In function 'int main()':
plan.cpp:25:14: warning: unused variable 'y' [-Wunused-variable]
         ll x,y;
              ^
plan.cpp:11:18: warning: unused variable 'j' [-Wunused-variable]
     ll n,m,Q,k,i,j;
                  ^

• Subtask 1: 0 / 10
• Subtask 2: 0 / 13
• Subtask 3: 0 / 12
• Subtask 4: 0 / 19
• Subtask 5: 0 / 46