oj.uz

Submission #106217

# Submission time Handle Problem Language Result Execution time Memory
106217 2019-04-17T12:53:37 Z polyfish Travelling Merchant (APIO17_merchant) C++14
Compilation error
 0 ms 0 KB 
//Pantyhose(black) + glasses = infinity

#include <bits/stdc++.h>
using namespace std;
 
#define debug(x) cerr << #x << " = " << x << '\n';
#define BP() cerr << "OK!\n";
#define PR(A, n) {cerr << #A << " = "; for (int64_t _=1; _<=n; ++_) cerr << A[_] << ' '; cerr << '\n';}
#define PR0(A, n) {cerr << #A << " = "; for (int64_t _=0; _<n; ++_) cerr << A[_] << ' '; cerr << '\n';}
#define FILE_NAME "merchant"

const int64_t MAX_N = 102;
const int64_t MAX_K = 1002;
const int64_t INF = 1e9+1e8;

struct edge {
	int64_t u, v;
	double w;

	edge() {}

	edge(int64_t u, int64_t v, double w): u(u), v(v), w(w) {}
};

int64_t n, m, k, b[MAX_N][MAX_K], s[MAX_N][MAX_K], c[MAX_N][MAX_N], mx[MAX_N][MAX_N];
vector<edge> g[MAX_N]; 
double d[MAX_N];

void read_input() {
	cin >> n >> m >> k;

	for (int64_t i=1; i<=n; ++i) {
		for (int64_t j=1; j<=k; ++j)
			cin >> b[i][j] >> s[i][j];
	}
}

void floyd() {
	for (int64_t i=1; i<=n; ++i) {
		for (int64_t j=1; j<=n; ++j)
			c[i][j] = INF;
	}

	for (int64_t i=1; i<=n; ++i)
		c[i][i] = 0;

	for (int64_t i=1; i<=m; ++i) {
		int64_t u, v;
		cin >> u >> v;
		cin >> c[u][v];
	}

	for (int64_t k=1; k<=n; ++k) {
		for (int64_t i=1; i<=n; ++i) {
			for (int64_t j=1; j<=n; ++j) {
				c[i][j] = min(c[i][j], c[i][k] + c[k][j]);
				assert(c[i][j]>=0);
			}
		}
	}

	// debug(c[4][1]);
}

void init() {
	for (int64_t i=1; i<=n; ++i) {
		for (int64_t j=1; j<=n; ++j) {
			mx[i][j] = -INF;

			for (int64_t t=1; t<=k; ++t) {
				if (b[i][t]!=-1 && s[j][t]!=-1)
					mx[i][j] = max(mx[i][j], -b[i][t] + s[j][t]);
			}
		}
	}

	// debug(mx[1][4]);
}

bool relax(edge e) {
	if (d[e.v]>d[e.u] + e.w) {
		d[e.v] = d[e.u] + e.w;
		return true;
	}

	return false;
}

bool check_negative_cycle(double x) {
	vector<edge> E;

	for (int64_t i=1; i<=n; ++i) {
		for (int64_t j=1; j<=n; ++j)
			E.push_back(edge(i, j, x*c[i][j] - max(0LL, mx[i][j])));
	}

	memset(d, 0, sizeof(d));

	for (int64_t i=0; i<=n; ++i) {
		if (i==n)
			return true;

		bool stop = true;

		for (auto e : E) {
			if (relax(e))
				stop = false;
		}

		if (stop)
			break;
	}

	return false;
}

double bisect() {
	double l = 0, r = INF;

	while (abs(l-r)>1e-2) {
		double mid = (l + r) / 2;

		if (check_negative_cycle(mid))
			l = mid;
		else
			r = mid;
	}

	return r;
}

int main() {
	freopen(FILE_NAME".inp", "r", stdin);
	freopen(FILE_NAME".out", "w", stdout);
	ios::sync_with_stdio(0); cin.tie(0);

	read_input();
	floyd();
	init();
	// debug(check_negative_cycle(1.9));
	cout << int64_t(bisect());
	// for (int64_t i=1; i<=n; ++i) {
	// 	for (int64_t j=1; j<=n; ++j) {
	// 		if (mx[i][j]==-INF)
	// 			cout << -1 << " \n"[j==n];
	// 		else
	// 			cout << mx[i][j] << " \n"[j==n];
	// 	}
	// }
}

Compilation message

merchant.cpp: In function 'bool check_negative_cycle(double)':
merchant.cpp:94:56: error: no matching function for call to 'max(long long int, int64_t&)'
    E.push_back(edge(i, j, x*c[i][j] - max(0LL, mx[i][j])));
                                                        ^
In file included from /usr/include/c++/7/bits/char_traits.h:39:0,
                 from /usr/include/c++/7/ios:40,
                 from /usr/include/c++/7/istream:38,
                 from /usr/include/c++/7/sstream:38,
                 from /usr/include/c++/7/complex:45,
                 from /usr/include/c++/7/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
                 from merchant.cpp:3:
/usr/include/c++/7/bits/stl_algobase.h:219:5: note: candidate: template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)
     max(const _Tp& __a, const _Tp& __b)
     ^~~
/usr/include/c++/7/bits/stl_algobase.h:219:5: note:   template argument deduction/substitution failed:
merchant.cpp:94:56: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int64_t {aka long int}')
    E.push_back(edge(i, j, x*c[i][j] - max(0LL, mx[i][j])));
                                                        ^
In file included from /usr/include/c++/7/bits/char_traits.h:39:0,
                 from /usr/include/c++/7/ios:40,
                 from /usr/include/c++/7/istream:38,
                 from /usr/include/c++/7/sstream:38,
                 from /usr/include/c++/7/complex:45,
                 from /usr/include/c++/7/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
                 from merchant.cpp:3:
/usr/include/c++/7/bits/stl_algobase.h:265:5: note: candidate: template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)
     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
     ^~~
/usr/include/c++/7/bits/stl_algobase.h:265:5: note:   template argument deduction/substitution failed:
merchant.cpp:94:56: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int64_t {aka long int}')
    E.push_back(edge(i, j, x*c[i][j] - max(0LL, mx[i][j])));
                                                        ^
In file included from /usr/include/c++/7/algorithm:62:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:65,
                 from merchant.cpp:3:
/usr/include/c++/7/bits/stl_algo.h:3462:5: note: candidate: template<class _Tp> constexpr _Tp std::max(std::initializer_list<_Tp>)
     max(initializer_list<_Tp> __l)
     ^~~
/usr/include/c++/7/bits/stl_algo.h:3462:5: note:   template argument deduction/substitution failed:
merchant.cpp:94:56: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
    E.push_back(edge(i, j, x*c[i][j] - max(0LL, mx[i][j])));
                                                        ^
In file included from /usr/include/c++/7/algorithm:62:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:65,
                 from merchant.cpp:3:
/usr/include/c++/7/bits/stl_algo.h:3468:5: note: candidate: template<class _Tp, class _Compare> constexpr _Tp std::max(std::initializer_list<_Tp>, _Compare)
     max(initializer_list<_Tp> __l, _Compare __comp)
     ^~~
/usr/include/c++/7/bits/stl_algo.h:3468:5: note:   template argument deduction/substitution failed:
merchant.cpp:94:56: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
    E.push_back(edge(i, j, x*c[i][j] - max(0LL, mx[i][j])));
                                                        ^
merchant.cpp: In function 'int main()':
merchant.cpp:133:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
  freopen(FILE_NAME".inp", "r", stdin);
  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
merchant.cpp:134:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
  freopen(FILE_NAME".out", "w", stdout);
  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~