Submission #532084

#	Time	Username	Problem	Language	Result	Execution time	Memory
532084		fhvirus	Naan (JOI19_naan)	C++17	5 / 100	1 ms	332 KiB

naan

// Knapsack DP is harder than FFT.
#include <bits/stdc++.h>
using namespace std;
typedef int64_t ll; typedef pair<int, int> pii;
#define pb emplace_back
#define AI(x) begin(x),end(x)
#define ff first
#define ss second
#ifdef OWO
#define debug(args...) LKJ("\033[1;32m[ " + string(#args) + " ]\033[0m", args)
template <class I> void LKJ(I&&x) { cerr << x << endl; }
template <class I, class...T> void LKJ(I&&x, T&&...t) { cerr << x << ", "; LKJ(t...); }
template <class I> void OI(I a, I b) { while (a != b) cerr << *a << " \n"[(a = next(a)) == b]; }
#else
#define debug(...) 0
#define OI(...) 0
#endif

const int kN = 2002;
const int kC = 100000;
int N, L, V[kN][kN];
ll ori[kN];

bool solve(const vector<int>& perm) {
	int k = 0;
	ll sum = 0;

	while (k < L and (sum + V[perm[0]][k + 1]) * N < ori[perm[0]]) {
		sum += V[perm[0]][k + 1];
		++k;
	}

	ll la = ori[perm[0]] - sum * N;
	ll lb = N * V[perm[0]][k + 1];

	ll left = 0;
	for (int i = 1; i <= L; ++i)
		left += V[perm[1]][i];
	left = (left - sum) * lb - V[perm[1]][k + 1] * la;

	if (left * N < ori[perm[1]]) return false;

	cout << k * lb + la << ' ' << lb << '\n';
	for (const int& i: perm)
		cout << i << " \n"[i == perm.back()];
	return true;
}

signed main() {
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

	cin >> N >> L;
	for (int i = 1; i <= N; ++i)
		for (int j = 1; j <= L; ++j) {
			cin >> V[i][j];
			ori[i] += V[i][j];
		}

	vector<int> perm(N);
	iota(AI(perm), 1);

	do if (solve(perm)) exit(0);
	while (next_permutation(AI(perm)));

	assert(0);
	cout << -1 << '\n';
	return 0;
}

• Subtask 1: 5 / 5
• Subtask 2: 0 / 24
• Subtask 3: 0 / 71