oj.uz

Submission #1067927

# Submission time Handle Problem Language Result Execution time Memory
1067927 2024-08-21T05:38:32 Z sleepntsheep Archery (IOI09_archery) C++17
16 / 100
 2000 ms 444 KB 
#pragma GCC optimize("O3,unroll-loops")
#include <cstdio>
#include <map>
#include <array>
using namespace std;

using ll = long long;
using ull = unsigned long long;

#define N 1000
#define N_ (2*N)

int n, r, s[N_], ans = 1e9, q[N_], opt;

ull hsh(array<int, N_> &a, int n) {
	constexpr ll BASE = 10001;
	ll z = 0, bp = 1;
	for (int i = 0; i < n; ++i)
		z = (z + bp * a[i]), bp *= BASE;
	return z;
}

array<int, N_> p, e;
int check() {
	for (int i = 0; i < n * 2; ++i) p[i] = q[i];

	map<ull, int> mp;

	for (int ii = 0, jj = 0; jj < r; ++ii, ++jj) {
		ull hh = hsh(p, 2 * n);
		if (mp.count(hh)) {
			int gap = jj - mp[hh];
			int left = r - jj;
			jj += left / gap * gap;
		} else {
			mp[hh] = jj;
		}

		int u = p[0], v = p[1];
		if (s[u] < s[v]) e[0] = u, e[n * 2 - 1] = v;
		else e[0] = v, e[n * 2 - 1] = u;

		for (int j = 2; j < n * 2; j += 2) {
			int u = p[j], v = p[j + 1];
			if (s[u] < s[v]) {
				e[(j - 2) + 1] = u;
				e[j] = v;
			} else {
				e[1 + (j - 2)] = v;
				e[j] = u;
			}
		}
		swap(p, e);
	}

	for (int i = 0; i < N_; ++i) if (e[i] == 0) return (i + 1) / 2;
	__builtin_unreachable();
}

int main() {
	scanf("%d%d", &n, &r);
	if(n>N)return 1;
	for (int i = 0; i < n * 2; ++i)
		scanf("%d", s + i), q[i] = i;

	if (ans >= check()) ans = check(), opt = 1;

	for (int i = 1; i < n * 2; ++i) {
		int o = 0;
		for (int j = 1; j <= i; ++j) q[o++] = j;
		q[o++] = 0;
		for (int j = i + 1; j < n * 2; ++j) q[o++] = j;

		if (ans >= check()) ans = check(), opt = (i + 2) / 2;
	}

	printf("%d", opt);
}

Compilation message

archery.cpp: In function 'int main()':
archery.cpp:61:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   61 |  scanf("%d%d", &n, &r);
      |  ~~~~~^~~~~~~~~~~~~~~~
archery.cpp:64:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   64 |   scanf("%d", s + i), q[i] = i;
      |   ~~~~~^~~~~~~~~~~~~

Subtask #1
4.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
3 Correct 81 ms 348 KB Output is correct
4 Runtime error 1 ms 344 KB Execution failed because the return code was nonzero
5 Correct 1 ms 344 KB Output is correct
6 Correct 181 ms 348 KB Output is correct

Subtask #2
12.0 / 94.0

# Verdict Execution time Memory Grader output
1 Incorrect 10 ms 348 KB Output isn't correct
2 Correct 244 ms 444 KB Output is correct
3 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
4 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
5 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
6 Correct 267 ms 348 KB Output is correct
7 Execution timed out 2077 ms 348 KB Time limit exceeded
8 Runtime error 0 ms 344 KB Execution failed because the return code was nonzero
9 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
10 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
11 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
12 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
13 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
14 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
15 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
16 Incorrect 325 ms 348 KB Output isn't correct
17 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
18 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
19 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
20 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
21 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
22 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
23 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
24 Correct 260 ms 444 KB Output is correct
25 Execution timed out 2071 ms 348 KB Time limit exceeded
26 Runtime error 1 ms 344 KB Execution failed because the return code was nonzero
27 Runtime error 0 ms 344 KB Execution failed because the return code was nonzero
28 Runtime error 1 ms 348 KB Execution failed because the return code was nonzero
29 Runtime error 0 ms 344 KB Execution failed because the return code was nonzero
30 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
31 Runtime error 1 ms 348 KB Execution failed because the return code was nonzero
32 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
33 Correct 306 ms 348 KB Output is correct
34 Correct 195 ms 444 KB Output is correct
35 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
36 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
37 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
38 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
39 Correct 344 ms 444 KB Output is correct
40 Execution timed out 2027 ms 344 KB Time limit exceeded
41 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
42 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
43 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
44 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
45 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
46 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
47 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero