oj.uz

Submission #1067910

# Submission time Handle Problem Language Result Execution time Memory
1067910 2024-08-21T05:28:49 Z sleepntsheep Archery (IOI09_archery) C++17
20 / 100
 816 ms 600 KB 
#pragma GCC optimize("O3,unroll-loops")
#include <cstdio>
#include <map>
#include <array>
using namespace std;

using ll = long long;

#define N 400
#define N_ (2*N)

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

ll hsh(array<int, N_> &a, int n) {
	constexpr ll BASE = 10001, MOD = 1000000007;
	ll z = 0, bp = 1;
	for (int i = 0; i < n; ++i) {
		z = (z + bp * a[i] % MOD) % MOD;
		(bp *= BASE) %= MOD;
	}
	return z;
}

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

	map<ll, int> mp;

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

		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;
			}
		}
		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:64:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   64 |  scanf("%d%d", &n, &r);
      |  ~~~~~^~~~~~~~~~~~~~~~
archery.cpp:67:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   67 |   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 133 ms 432 KB Output is correct
4 Runtime error 1 ms 348 KB Execution failed because the return code was nonzero
5 Correct 1 ms 348 KB Output is correct
6 Correct 433 ms 432 KB Output is correct

Subtask #2
16.0 / 94.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 348 KB Output is correct
2 Correct 580 ms 432 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 344 KB Execution failed because the return code was nonzero
6 Correct 654 ms 348 KB Output is correct
7 Runtime error 0 ms 344 KB Execution failed because the return code was nonzero
8 Runtime error 0 ms 344 KB Execution failed because the return code was nonzero
9 Runtime error 0 ms 344 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 600 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 Correct 816 ms 432 KB Output is correct
17 Runtime error 0 ms 344 KB Execution failed because the return code was nonzero
18 Runtime error 0 ms 344 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 630 ms 432 KB Output is correct
25 Runtime error 0 ms 344 KB Execution failed because the return code was nonzero
26 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
27 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
28 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
29 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
30 Runtime error 1 ms 348 KB Execution failed because the return code was nonzero
31 Runtime error 0 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 729 ms 428 KB Output is correct
34 Correct 467 ms 344 KB Output is correct
35 Runtime error 0 ms 344 KB Execution failed because the return code was nonzero
36 Runtime error 0 ms 344 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 1 ms 348 KB Execution failed because the return code was nonzero
39 Correct 770 ms 348 KB Output is correct
40 Runtime error 0 ms 348 KB Execution failed because the return code was nonzero
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