Submission #1154027

#	Time	Username	Problem	Language	Result	Execution time	Memory
1154027		Webbly	Evacuation plan (IZhO18_plan)	C++20	35 / 100	4051 ms	511000 KiB

plan

// Problem: A - Maximum Subset Sum
// Contest: Virtual Judge - XOR basis
// URL: https://vjudge.net/contest/694928#problem/A
// Memory Limit: 64 MB
// Time Limit: 1000 ms
// 
// Powered by CP Editor (https://cpeditor.org)

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//
//                  Solution
//                    Webbly, 27.01.2023
//
//
//                    Arsen ne katai
//
//
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////



#include<bits/stdc++.h>

/**
#include <algorithm>
#include <iostream>
#include <vector>
#include <queue>
#include <cmath>
#include <map>
#include <set>
#include <time.h>
*/
//#pragma GCC optimize("O3")
//#pragma GCC optimize("fast-loops")
//#pragma comment(linker, "/stack:200000000")
//#pragma GCC optimize("Ofast")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
/**
#pragma GCC optimize("-funsafe-loop-optimizations")
#pragma GCC optimize("-funroll-loops")
#pragma GCC optimize("-fwhole-program")
#pragma GCC optimize("Ofast,no-stack-protector")
#pragma GCC optimize("-fthread-jumps")
#pragma GCC optimize("-falign-functions")
#pragma GCC optimize("-falign-jumps")
#pragma GCC optimize("-falign-loops")
#pragma GCC optimize("-falign-labels")
#pragma GCC optimize("-fcaller-saves")
#pragma GCC optimize("-fcrossjumping")
#pragma GCC optimize("-fcse-follow-jumps")
#pragma GCC optimize("-fcse-skip-blocks")
#pragma GCC optimize("-fdelete-null-pointer-checks")
#pragma GCC optimize("-fdevirtualize")
#pragma GCC optimize("-fexpensive-optimizations")
#pragma GCC optimize("-fgcse")
#pragma GCC optimize("-fgcse-lm")
#pragma GCC optimize("-fhoist-adjacent-loads")
#pragma GCC optimize("-finline-small-functions")
#pragma GCC optimize("-findirect-inlining")
#pragma GCC optimize("-fipa-sra")
#pragma GCC optimize("-foptimize-sibling-calls")
#pragma GCC optimize("-fpartial-inlining")
#pragma GCC optimize("-fpeephole2")
#pragma GCC optimize("-freorder-blocks")
#pragma GCC optimize("-freorder-functions")
#pragma GCC optimize("-frerun-cse-after-loop")
#pragma GCC optimize("-fsched-interblock")
#pragma GCC optimize("-fsched-spec")
#pragma GCC optimize("-fschedule-insns")
#pragma GCC optimize("-fschedule-insns2")
#pragma GCC optimize("-fstrict-aliasing")
#pragma GCC optimize("-fstrict-overflow")
#pragma GCC optimize("-ftree-switch-conversion")
#pragma GCC optimize("-ftree-tail-merge")
#pragma GCC optimize("-ftree-pre")
#pragma GCC optimize("-ftree-vrp")
#pragma GCC target("avx")
*/
#define ll long long
#define ull unsigned long long
#define kebzaro ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0);
#define pb push_back
#define mp make_pair
#define all(x) x.begin(),x.end()
#define flush cout.flush()

using namespace std;

const ll mod = (ll)1e9 + 7, mod3 = 998244353, inf = (ll)2e15, P = 31;

void judge(string name){
	if (name.size()){
		freopen((name + ".in").c_str(), "r", stdin);
		freopen((name + "out").c_str(), "w", stdout);
	}
}

ll rnd(){
    ll x = rand();

    return rand() ^ x;
}

ll binpow (ll a, ll b){
    ll ans = 1;
    while(b){
        if (b & 1){
            ans *= a;

            ans %= mod;
        }

        b >>= 1;
        a *= a;

        a %= mod;
    }
    return ans;
}
ll gcd(ll a, ll b){
    return (b ? gcd(b, a % b) : a);
}
ll lcm(ll a, ll b){
    return a / gcd(a, b) * b;
}

struct tr{
    ll four, seven, inc, dec;
};

struct T{
    ll l, x, ind;
};

ll n, m, k, a[500005], b[500005], d[500005];

vector <pair <ll, ll> > g[100005];

queue <pair <ll, ll> > q;

ll used[100005];

void bfs(){
	while(!q.empty()){
		ll v = q.front().first, cost = q.front().second;
		
		q.pop();
		
		if (d[v] < cost) continue;
		
		for (auto i : g[v]){
			if (d[i.first] > cost + i.second){
				d[i.first] = cost + i.second;
				
				q.push({i.first, d[i.first]});
			}
		}
	}
}

ll naive(ll x, ll y){
	queue <pair <ll, ll> > t;
	
	ll mx = inf;
	
	t.push({x, d[x]});
	
	for (ll i = 1; i <= n; i++){
		used[i] = 0;
	}
	
	while(!t.empty()){
		ll v = t.front().first, cost = t.front().second;
		
		t.pop();
		
		if (used[v] > cost) continue;
		
		for (auto i : g[v]){
			if (used[i.first] < cost){
				used[i.first] = min(d[i.first], cost);
				
				t.push({i.first, min(d[i.first], cost)});
			}
		}
	}
	
	return used[y];
}

void sarsen(){
    cin >> n >> m;
    
    for (ll i = 1; i <= n; i++){
		d[i] = inf;
	}
    
    for (ll i = 1, x, y, z; i <= m; i++){
    	cin >> x >> y >> z;
    	
    	g[x].pb({y, z});
    	g[y].pb({x, z});
    }
    
    cin >> k;
    
    for (ll i = 1, x; i <= k; i++){
    	cin >> x;
    	
    	q.push({x, 0ll});
    	
    	d[x] = 0;
    }
    
    bfs();
    
    cin >> k;
    
    for (ll i = 1, x, y; i <= k; i++){
    	cin >> x >> y;
    	
    	if (n <= 15 || k == 1){
    		cout << naive(x, y) << '\n';	
    	}
    	
    	else{
    		cout << min(d[x], d[y]) << '\n';
    	}
    }
}

int main(){
    kebzaro

    judge("");

    ll TT = 1, tests = 1;

    //cin >> TT;

    while(TT--){
        //cout << "Case " << tests << ": ";

        sarsen();

        //tests++;
    }

    return 0;
}
/**

1001
1011
0101

*/

Compilation message (stderr)

plan.cpp: In function 'void judge(std::string)':
plan.cpp:96:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   96 |                 freopen((name + ".in").c_str(), "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
plan.cpp:97:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   97 |                 freopen((name + "out").c_str(), "w", stdout);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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