Submission #444383

#	Time	Username	Problem	Language	Result	Execution time	Memory
444383		arwaeystoamneg	Travelling Merchant (APIO17_merchant)	C++17	100 / 100	494 ms	3532 KiB

merchant

// EXPLOSION!
#define _CRT_SECURE_NO_WARNINGS
#include<bits/stdc++.h>
#include<unordered_set>
#include<unordered_map>
#include<chrono>

using namespace std;
typedef pair<int, int> pii;
typedef long long ll;
typedef pair<ll, ll> pll;
typedef long double ld;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<pair<int, int>> vpi;
typedef vector<pair<ll, ll>> vpll;

#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)
#define R0F(i,a) ROF(i,0,a)
#define trav(a,x) for (auto& a: x)

#define pb push_back
#define mp make_pair
#define rsz resize
#define sz(x) int(x.size())
#define all(x) x.begin(),x.end()
#define f first
#define s second
#define cont continue
#define endl '\n'
//#define ednl '\n'
#define test int testc;cin>>testc;while(testc--)
#define pr(a, b) trav(x,a)cerr << x << b; cerr << endl;
#define message cout << "Hello World" << endl;
const int dx[4] = { 1,0,-1,0 }, dy[4] = { 0,1,0,-1 }; // for every grid problem!!
const ll linf = 4000000000000000000LL;
const ll inf = 1000000007;//998244353    

void pv(vi a) { trav(x, a)cout << x << " "; cout << endl; }void pv(vll a) { trav(x, a)cout << x << " "; cout << endl; }void pv(vector<vi>a) {
	F0R(i, sz(a)) { cout << i << endl; pv(a[i]); cout << endl; }
}void pv(vector<vll>a) { F0R(i, sz(a)) { cout << i << endl; pv(a[i]); }cout << endl; }void pv(vector<string>a) { trav(x, a)cout << x << endl; cout << endl; }
void setIO(string s) {
	ios_base::sync_with_stdio(0); cin.tie(0);
#ifdef arwaeystoamneg
	if (sz(s))
	{
		freopen((s + ".in").c_str(), "r", stdin);
		if (s != "test1")
			freopen((s + ".out").c_str(), "w", stdout);
	}
#endif
}
const int MAX = 111;
int n, m, k, A[MAX][10 * MAX], B[MAX][10 * MAX];
int dist[MAX][MAX];
ll best[MAX][MAX], dp[MAX][MAX];
bool check(int x)
{
	F0R(i, n)
	{
		F0R(j, n)
		{
			ll ans = -(ll)x * dist[i][j];
			F0R(l, k)
			{
				if (A[i][l] == -1 || B[j][l] == -1)continue;
				ans = max(ans, B[j][l] - A[i][l] - (ll)x * dist[i][j]);
			}
			best[i][j] = ans;
		}
	}
	F0R(i, n)fill(dp[i], dp[i] + n, linf);
	F0R(i, n)F0R(j, n)dp[i][j] = -best[i][j];
	F0R(k, n)
	{
		F0R(i, n)
		{
			F0R(j, n)
			{
				if (dp[i][j] > dp[i][k] + dp[k][j])
					dp[i][j] = dp[i][k] + dp[k][j];
			}
		}
	}
	F0R(i, n)if (dp[i][i] <= 0)return 1;
	return 0;
}
int main()
{
	setIO("test1");
	cin >> n >> m >> k;
	F0R(i, n)
	{
		F0R(j, k)cin >> A[i][j] >> B[i][j];
		fill(dist[i], dist[i] + n, inf);
	}
	F0R(i, m)
	{
		int x, y, z;
		cin >> x >> y >> z;
		x--, y--;
		dist[x][y] = min(dist[x][y], z);
	}
	F0R(k, n)
	{
		F0R(i, n)
		{
			F0R(j, n)
			{
				if (dist[i][j] > dist[i][k] + dist[k][j])
				{
					dist[i][j] = dist[i][k] + dist[k][j];
				}
			}
		}
	}
	int l = 0, r = inf;
	while (l < r)
	{
		int m = (l + r + 1) / 2;
		if (check(m))l = m;
		else r = m - 1;
	}
	cout << l << endl;
}

• Subtask 1: 12 / 12
• Subtask 2: 21 / 21
• Subtask 3: 33 / 33
• Subtask 4: 34 / 34