제출 #495242

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
495242		vinnipuh01	Evacuation plan (IZhO18_plan)	C++17	0 / 100	470 ms	14616 KiB

plan

#include <iostream>
#include <bits/stdc++.h>
#include <cmath>
#include <algorithm>
#include <vector>
#include <deque>
#include <set>
#include <stack>
#include <string>
#include <map>
#include <queue>

using namespace std;

const long long oo = 1000000000000000000;

long long int  sum, ans = 0, mx = 0, mn = 1000000000, num, pos;


/*
    ViHHiPuh

   (( `'-""``""-'` ))
     )-__-_.._-__-(
   / --- (o _ o) --- \
   \ .-* ( .0. ) *-. /
   _'-. ,_ '=' _, .-'_
  / `;#'#'# - #'#'#;` \
 \_)) -----'#'----- ((_/
      # --------- #
  '# ------- ------ #'
  /..-'# ------- #'-.\
  _\...-\'# -- #'/-.../_
  ((____)- '#' -(____))


    cout << fixed << setprecision(6) << x;


    freopen ( "sum.in", "r", stdin )
*/

int d[ 100001 ], p[ 100001 ], dp[ 100001 ][ 20 ], col[ 100001 ];
queue <int> q;
set <pair<int, int> > st;
vector <pair<int, int> > v[ 100001 ], vv;
map <pair<int, int>, int> answer, mp;
map <int, int> dd;


int main () {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
	int n, m;
	cin >> n >> m;
	int x, y, z;
	for ( int i = 1; i <= m; i ++ ) {
		cin >> x >> y >> z;
		v[ x ].push_back( { y, z } );
		v[ y ].push_back( { x, z } );
	}
	for ( int i = 1; i <= n; i ++ )
		d[ i ] = mn;
	int k;
	cin >> k;
	int a;
	for ( int i = 1; i <= k; i ++ ) {
		cin >> a;
		q.push( a );
		d[ a ] = 0;
	}
	while ( q.size() ) {
		num = q.front();
		q.pop();
		for ( auto to : v[ num ] ) {
			if ( d[ to.first ] > d[ num ] + to.second ) {
				d[ to.first ] = d[ num ] + to.second;
				q.push( to.first );
			}
		}
	}
	for ( int i = 1; i <= n; i ++ ) {
		if ( d[ i ] > mx ) {
			mx = d[ i ];
			pos = i;
		}
	}
	dd[ pos ] = d[ pos ];
	st.insert( { d[ pos ], pos } );
	while ( st.size() ) {
		num = st.rbegin()->second;
		st.erase( --st.end() );
		for ( auto to : v[ num ] ) {
			if ( dd[ to.first ] < min( dd[ num ], d[ to.first ] ) ) {
				st.erase( { dd[ to.first ], to.first } );
				dd[ to.first ] = min( dd[ num ], d[ to.first ] );
				st.insert( { dd[ to.first ], to.first } );
			}
		}
	}
	int qq;
	cin >> qq;
	int l, r;
	while ( qq -- ) {
		cin >> l >> r;
		cout << min( dd[ l ], dd[ r ] ) << "\n";
	}
}

/*
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
5
1 6
5 3
4 8
5 8
1 5

*/

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