Submission #659517

#	Time	Username	Problem	Language	Result	Execution time	Memory
659517		franfill	Restore Array (RMI19_restore)	C++17	0 / 100	133 ms	195744 KiB

restore

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

int main()
{
	int n, m;
	cin >> n >> m;
	vector < vector < int > > greater(n, vector < int > (n+1, 0));
	vector < vector < int > > smaller(n, vector < int > (n+1, n));

	for (int i = 0; i < m; i++)
	{
		int l, r, k, value;
		cin >> l >> r >> k >> value;
		r++;
		int len = r-l;
		if (value == 0)
			smaller[l][r] = min(smaller[l][r], len - k);
		else
			greater[l][r] = max(greater[l][r], len - k + 1);
	}
	for (int i = 0; i < n; i++)
		smaller[i][i+1] = min(smaller[i][i+1], 1);

/*
	for (int i = 0; i < n; i++)
		for (int j = i+1; j <= n; j++)
			cerr << i << " -> " << j << " " << smaller[i][j] << " " << greater[i][j] << "\n";
	*/

	vector < int > mi(n+1, 0);
	vector < int > ma(n+1, n);
	ma[0] = 0;
	for (int i = 0; i < n; i++)
	{
		int res = 0;
		/*if (mi[i] > ma[i])
		{
			cout << -1 << "\n";
			return 0;
		}*/
		for (int j = n; j > i; j--)
		{
			res = max(res, greater[i][j]);
			mi[j] = max(mi[j], mi[i] + res);
			ma[j] = min(ma[j], ma[i] + smaller[i][j]);
			if (j != n);
				ma[j] = min(ma[j], ma[j+1]);
			res = max(res-1, 0);
		}
		if (res != 0)
		{
			cout << -1 << "\n";
			return 0;
		}
	}

	for (int i = 0; i < n; i++)
		for (int j = i+1; j <= n; j++)
		{
			if (mi[j] > mi[i] + smaller[i][j])
			{
				cout << -1 << "\n";
				return 0;
			}
		}

	vector < int > res;
	for (int i = 1; i <= n; i++)
	{
		if (mi[i] > ma[i])
		{
			cout << -1 << "\n";
			return 0;
		}
		res.emplace_back(mi[i] - mi[i-1]);
		//assert(res.back() == 1 || res.back() == 0);
	}
	for (auto x : res)
		cout << x << " ";
	cout << "\n";
	return 0;
}

Compilation message (stderr)

restore.cpp: In function 'int main()':
restore.cpp:47:4: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   47 |    if (j != n);
      |    ^~
restore.cpp:48:5: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   48 |     ma[j] = min(ma[j], ma[j+1]);
      |     ^~

• Subtask 1: 0 / 7
• Subtask 2: 0 / 13
• Subtask 3: 0 / 25
• Subtask 4: 0 / 55