Submission #696603

#	Time	Username	Problem	Language	Result	Execution time	Memory
696603		SanguineChameleon	Autobus (COCI22_autobus)	C++17	70 / 70	177 ms	10024 KiB

Main

// BEGIN BOILERPLATE CODE

#include <bits/stdc++.h>
using namespace std;

#ifdef KAMIRULEZ
	const bool kami_loc = true;
	const long long kami_seed = 69420;
#else
	const bool kami_loc = false;
	const long long kami_seed = chrono::steady_clock::now().time_since_epoch().count();
#endif

const string kami_fi = "kamirulez.inp";
const string kami_fo = "kamirulez.out";
mt19937_64 kami_gen(kami_seed);

long long rand_range(long long rmin, long long rmax) {
	uniform_int_distribution<long long> rdist(rmin, rmax);
	return rdist(kami_gen);
}

long double rand_real(long double rmin, long double rmax) {
	uniform_real_distribution<long double> rdist(rmin, rmax);
	return rdist(kami_gen);
}

void file_io(string fi, string fo) {
	if (fi != "" && (!kami_loc || fi == kami_fi)) {
		freopen(fi.c_str(), "r", stdin);
	}
	if (fo != "" && (!kami_loc || fo == kami_fo)) {
		freopen(fo.c_str(), "w", stdout);
	}
}

void set_up() {
	if (kami_loc) {
		file_io(kami_fi, kami_fo);
	}
	ios_base::sync_with_stdio(0);
	cin.tie(0);
}

void just_do_it();

void just_exec_it() {
	if (kami_loc) {
		auto pstart = chrono::steady_clock::now();
		just_do_it();
		auto pend = chrono::steady_clock::now();
		long long ptime = chrono::duration_cast<chrono::milliseconds>(pend - pstart).count();
		string bar(50, '=');
		cout << '\n' << bar << '\n';
		cout << "Time: " << ptime << " ms" << '\n';
	}
	else {
		just_do_it();
	}
}

int main() {
	set_up();
	just_exec_it();
	return 0;
}

// END BOILERPLATE CODE

// BEGIN MAIN CODE

const long long inf = 1e18L + 20;
const int ms = 75;
long long dp[ms][ms][ms];

void just_do_it() {
	fill_n(&dp[0][0][0], ms * ms * ms, inf);
	int n, m;
	cin >> n >> m;
	for (int i = 1; i <= n; i++) {
		dp[i][i][0] = 0;
	}
	for (int i = 0; i < m; i++) {
		int u, v;
		long long w;
		cin >> u >> v >> w;
		dp[u][v][1] = min(dp[u][v][1], w);
	}
	for (int k = 1; k <= n; k++) {
		for (int u = 1; u <= n; u++) {
			for (int v = 1; v <= n; v++) {
				dp[u][v][k] = min(dp[u][v][k], dp[u][v][k - 1]);
				for (int x = 1; x <= n; x++) {
					dp[u][v][k] = min(dp[u][v][k], dp[u][x][k - 1] + dp[x][v][1]);
				}
			}
		}
	}
	int K, Q;
	cin >> K >> Q;
	K = min(K, n);
	for (int i = 0; i < Q; i++) {
		int u, v;
		cin >> u >> v;
		long long res = dp[u][v][K];
		if (res == inf) {
			cout << -1 << '\n';
		}
		else {
			cout << res << '\n';
		}
	}
}

// END MAIN CODE

Compilation message (stderr)

Main.cpp: In function 'void file_io(std::string, std::string)':
Main.cpp:30:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |   freopen(fi.c_str(), "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:33:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |   freopen(fo.c_str(), "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 15 / 15
• Subtask 2: 15 / 15
• Subtask 3: 25 / 25
• Subtask 4: 15 / 15