Submission #639717

#	Time	Username	Problem	Language	Result	Execution time	Memory
639717		ghostwriter	Travelling Merchant (APIO17_merchant)	C++14	100 / 100	84 ms	3388 KiB

merchant

#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
#include <debug.h>
#endif
#define st first
#define nd second
#define pb push_back
#define pf push_front
#define _pb pop_back
#define _pf pop_front
#define lb lower_bound
#define ub upper_bound
#define mtp make_tuple
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()
typedef long long ll; typedef unsigned long long ull;
typedef double db; typedef long double ldb;
typedef pair<int, int> pi; typedef pair<ll, ll> pll;
typedef vector<int> vi; typedef vector<ll> vll; typedef vector<pi> vpi; typedef vector<pll> vpll;
typedef string str;
template<typename T> T gcd(T a, T b) { return (b == 0? a : gcd(b, a % b)); }
template<typename T> T lcm(T a, T b) { return a / gcd(a, b) * b; }
#define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
#define FOS(i, r, l) for (int (i) = (r); (i) >= (l); --(i))
#define EACH(i, x) for (auto &(i) : (x))
#define WHILE while
#define file "TEST"
mt19937 rd(chrono::steady_clock::now().time_since_epoch().count());
ll rand(ll l, ll r) { return uniform_int_distribution<ll>(l, r)(rd); }
/*
    Tran The Bao
    CTL - Da Lat
    Cay ngay cay dem nhung deo duoc cong nhan
*/
const ll oo = 1e18;
const int N = 105;
const int K = 1005;
int n, m, k, b[N][K], s[N][K], c[N][N];
ll d[N][N], g[N][N];
bool check(int x) {
	FOR(i, 1, n)
	FOR(j, 1, n) {
		if (i == j) {
			g[i][j] = -oo;
			continue;
		}
		if (d[i][j] == oo) {
			g[i][j] = -oo;
			continue;
		}
		g[i][j] = -x * d[i][j] + c[i][j];
	}
	FOR(z, 1, n)
	FOR(i, 1, n)
	FOR(j, 1, n)
		g[i][j] = max(g[i][j], g[i][z] + g[z][j]);
	FOR(i, 1, n)
		if (g[i][i] >= 0)
			return 1;
	return 0;
}
signed main() {
    ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
    // freopen(file".inp", "r", stdin);
    // freopen(file".out", "w", stdout);
    cin >> n >> m >> k;
    FOR(i, 1, n)
    FOR(j, 1, k)
    	cin >> b[i][j] >> s[i][j];
    FOR(i, 1, n)
    FOR(j, 1, n)
    	d[i][j] = (i == j? 0 : oo);
    FOR(i, 1, m) {
    	int v, w, t;
    	cin >> v >> w >> t;
    	d[v][w] = t;
    }
    FOR(z, 1, n)
    FOR(i, 1, n)
    FOR(j, 1, n)
    	d[i][j] = min(d[i][j], d[i][z] + d[z][j]);
    FOR(i, 1, n)
    FOR(j, 1, n)
	FOR(z, 1, k)
		if (b[i][z] != -1 && s[j][z] != -1)
			c[i][j] = max(c[i][j], -b[i][z] + s[j][z]);
    int l = 1, r = 1e9, ans = 0;
    WHILE(l <= r) {
    	int mid = l + (r - l) / 2;
    	if (check(mid)) {
    		ans = mid;
    		l = mid + 1;
    	}
    	else r = mid - 1;
    }
    cout << ans;
    return 0;
}
/*
4 5 2
10 9 5 2
6 4 20 15
9 7 10 9
-1 -1 16 11
1 2 3
2 3 3
1 4 1
4 3 1
3 1 1
*/

Compilation message (stderr)

merchant.cpp: In function 'bool check(int)':
merchant.cpp:24:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   24 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
merchant.cpp:42:2: note: in expansion of macro 'FOR'
   42 |  FOR(i, 1, n)
      |  ^~~
merchant.cpp:24:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   24 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
merchant.cpp:43:2: note: in expansion of macro 'FOR'
   43 |  FOR(j, 1, n) {
      |  ^~~
merchant.cpp:24:31: warning: unnecessary parentheses in declaration of 'z' [-Wparentheses]
   24 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
merchant.cpp:54:2: note: in expansion of macro 'FOR'
   54 |  FOR(z, 1, n)
      |  ^~~
merchant.cpp:24:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   24 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
merchant.cpp:55:2: note: in expansion of macro 'FOR'
   55 |  FOR(i, 1, n)
      |  ^~~
merchant.cpp:24:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   24 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
merchant.cpp:56:2: note: in expansion of macro 'FOR'
   56 |  FOR(j, 1, n)
      |  ^~~
merchant.cpp:24:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   24 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
merchant.cpp:58:2: note: in expansion of macro 'FOR'
   58 |  FOR(i, 1, n)
      |  ^~~
merchant.cpp: In function 'int main()':
merchant.cpp:24:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   24 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
merchant.cpp:68:5: note: in expansion of macro 'FOR'
   68 |     FOR(i, 1, n)
      |     ^~~
merchant.cpp:24:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   24 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
merchant.cpp:69:5: note: in expansion of macro 'FOR'
   69 |     FOR(j, 1, k)
      |     ^~~
merchant.cpp:24:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   24 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
merchant.cpp:71:5: note: in expansion of macro 'FOR'
   71 |     FOR(i, 1, n)
      |     ^~~
merchant.cpp:24:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   24 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
merchant.cpp:72:5: note: in expansion of macro 'FOR'
   72 |     FOR(j, 1, n)
      |     ^~~
merchant.cpp:24:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   24 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
merchant.cpp:74:5: note: in expansion of macro 'FOR'
   74 |     FOR(i, 1, m) {
      |     ^~~
merchant.cpp:24:31: warning: unnecessary parentheses in declaration of 'z' [-Wparentheses]
   24 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
merchant.cpp:79:5: note: in expansion of macro 'FOR'
   79 |     FOR(z, 1, n)
      |     ^~~
merchant.cpp:24:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   24 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
merchant.cpp:80:5: note: in expansion of macro 'FOR'
   80 |     FOR(i, 1, n)
      |     ^~~
merchant.cpp:24:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   24 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
merchant.cpp:81:5: note: in expansion of macro 'FOR'
   81 |     FOR(j, 1, n)
      |     ^~~
merchant.cpp:24:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   24 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
merchant.cpp:83:5: note: in expansion of macro 'FOR'
   83 |     FOR(i, 1, n)
      |     ^~~
merchant.cpp:24:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   24 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
merchant.cpp:84:5: note: in expansion of macro 'FOR'
   84 |     FOR(j, 1, n)
      |     ^~~
merchant.cpp:24:31: warning: unnecessary parentheses in declaration of 'z' [-Wparentheses]
   24 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
merchant.cpp:85:2: note: in expansion of macro 'FOR'
   85 |  FOR(z, 1, k)
      |  ^~~

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