oj.uz

Submission #569028

# Submission time Handle Problem Language Result Execution time Memory
569028 2022-05-26T13:46:41 Z blue MP3 Player (CEOI10_mp3player) C++17
10 / 100
 1000 ms 6244 KB 
#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

using vi = vector<int>;
using vvi = vector<vi>;
#define sz(x) int(x.size())

int N, Vmax, V2;
vi A, C;
vi D;

const int INF = 2'000'000'005;


struct func
{
	int y1;
	int x1;
	int x2;

	int eval(int x)
	{
		if(x <= x1)
			return y1;
		else
			return y1 + min(x,x2) - x1;
	}
};

func combine(func A, func B)
{
	if(max(A.y1, B.x1) <= min(A.y1 + A.x2 - A.x1, B.x2))
		return {B.eval(A.eval(0)), max(A.y1, B.x1) - A.y1 + A.x1, min(A.y1 + A.x2 - A.x1, B.x2) - A.y1 + A.x1};
	else
		return {B.eval(A.eval(0)), 0, 0};
}

func nothing;
func plusone;
func minusone;

const int lg = 17;
const int Z = (1<<lg);




vector<func> segtree;

void set(int i, func v)
{
	segtree[Z+i] = v;
	for(int j = (Z+i)>>1; j >= 1; j >>= 1)
		segtree[j] = combine(segtree[2*j], segtree[2*j+1]);
}

int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);

	cin >> N >> Vmax >> V2;

	nothing = {0, 0, Vmax};
	plusone = {1, 0, Vmax-1};
	minusone = {0, 1, Vmax};

	A = C = vi(1+N);

	for(int i = 1; i <= N; i++)
	{
		char c;
		cin >> c;
		A[i] = (c == '+' ? +1 : -1);
		cin >> C[i];
	}

	D = vi(1+N);
	D[1] = INF;
	for(int i = 2; i <= N; i++)
		D[i] = C[i] - C[i-1];

	vi I;
	for(int i = 1; i <= N; i++)
		I.push_back(i);


	int T = 0, V1 = V2;

	sort(I.begin(), I.end(), [] (int p, int q)
	{
		return D[p] < D[q];
	});

	int u = 0, v = 0;

	segtree = vector<func>((1<<(lg+1)) + 1, nothing);

	for(int v1 = 0; v1 <= Vmax; v1++)
	{
		for(int y = 2; y <= N; y++)
		{
			int t = D[y]-1;

			// cerr << "\n\n";
			// cerr << t << ' ' << v1 << '\n';

			int cv = v1;
			for(int i = 1; i <= N; i++)
			{
				if(D[i] <= t)
					cv += A[i];

				cv = min(cv, Vmax);
				cv = max(cv, 0);
			}

			if(cv == V2)
			{
				if(t > T || (t == T && v1 > V1))
				{
					T = t;
					V1 = v1;
				}
			}
		}
	}

	if(T > 2'000'000'000)
		cout << "infinity\n";
	else
		cout << T << ' ' << V1 << '\n';

}

Compilation message

mp3player.cpp: In function 'int main()':
mp3player.cpp:97:6: warning: unused variable 'u' [-Wunused-variable]
   97 |  int u = 0, v = 0;
      |      ^
mp3player.cpp:97:13: warning: unused variable 'v' [-Wunused-variable]
   97 |  int u = 0, v = 0;
      |             ^

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 3412 KB Output is correct
2 Correct 2 ms 3392 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1089 ms 3412 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1086 ms 3404 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1084 ms 3460 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1081 ms 4052 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1072 ms 4180 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1090 ms 4308 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1095 ms 4696 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1068 ms 6244 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1086 ms 6216 KB Time limit exceeded
2 Halted 0 ms 0 KB -