Submission #697040

#	Time	Username	Problem	Language	Result	Execution time	Memory
697040		vjudge1	Toll (BOI17_toll)	C++17	0 / 100	230 ms	524288 KiB

toll

#include<bits/stdc++.h>

using namespace std;

#define mems(a, v) memset(a, v, sizeof(a))
#define all(v) v.begin(), v.end()
#define f first
#define sc second
#define pb push_back
#define mp make_pair
#define speed() ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define pi 3.14159265358979323846
#define BFS_BLACK 1
#define BFS_WHITE -1
#define BFS_GREY 2
#define DFS_BLACK 1
#define DFS_WHITE -1
#define DFS_GREY 2
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
typedef pair<ll, ll> ii;
typedef vector<ll> vi;
typedef vector<pair<ll,ll>> vii;
typedef vector<vi> vvi;
const ll LOG = 17;
const ll maxn = 5e5 + 5;
const ll mod = 1e9 + 7;
const ll inf = 1e9;

struct Matrix
{
	ll a[5][5];
	Matrix()
	{
		for(ll i=0; i<5; i++)
        {
			for (ll j=0; j<5; j++)
			{
				a[i][j] = inf;
			}
		}
	}
};

Matrix up[maxn][18];

Matrix calc(Matrix x, Matrix y)
{
    Matrix c;
    for (ll i=0; i<5; i++)
    {
        for (ll j=0; j<5; j++)
        {
            c.a[i][j] = inf;
            for (ll k=0; k<5; k++)
            {
                c.a[i][j] = min(c.a[i][j], x.a[i][k] + y.a[k][j]);
            }
        }
    }
    return c;
}
signed main()
{
	ll k, n, m, o;
    cin >> k >> n >> m >> o;
    for(ll i=0; i<m; i++)
    {
    	ll u, v, w;
    	cin >> u >> v >> w;
    	up[u/k][0].a[u%k][v%k] = w;
    }
    for(ll i=1; (1<<i)<=n; i++)
    {
    	for(ll j=0; j+(1<<i)-1<=n; j++)
    	{
    		up[j][i] = calc(up[j][i-1], up[j+(1<<(i-1))][i-1]);
    	}
    }
    for(ll i=0; i<o; i++)
    {
    	ll a, b;
    	cin >> a >> b;
    	Matrix res;
    	for(ll j=0; j<5; j++)
    	{
    		res.a[j][j] = 0;
    	}
    	if(a == b)
    	{
    		cout << 0 << endl;
    		continue;
    	}
    	ll div1 = a/k, div2 = b/k;
    	ll dist = div2 - div1;
    	for(ll j=16; j>=0; j--)
    	{
    		if(dist & (1 << j))
    		{
    			res = calc(res, up[div1][j]);
    			div1 += (1 << j);
    		}
    	}
    	if(res.a[a%k][b%k] == inf)
    	{
    	    cout << -1 << endl;
    	}
    	else
        {
            cout << res.a[a%k][b%k] << endl;
        }
    }
}

• Subtask 1: 0 / 7
• Subtask 2: 0 / 10
• Subtask 3: 0 / 8
• Subtask 4: 0 / 31
• Subtask 5: 0 / 44