oj.uz

Submission #781121

# Submission time Handle Problem Language Result Execution time Memory
781121 2023-07-12T18:15:39 Z JoenPoenMan Xylophone (JOI18_xylophone) C++17
100 / 100
 93 ms 724 KB 
#include "xylophone.h"
#include <bits/stdc++.h>

using namespace std;
typedef pair<int, int> ii;

#define ALL(arr) begin(arr), end(arr)
#define CONTAINS(arr, val) (find(begin(arr), end(arr), val) != end(arr))

vector<vector<int>> poss;
vector<int> found;
vector<int> foundvals;

int binSearch(int bot, int top, int diff) {
	int mid;
	int low = bot, high = top;
	while (low != high) {
		mid = (low+high)/2;
		int res = high;
		if (mid != high)
			res = query(bot, mid);
		if (res == diff) high = mid;
		else low = mid+1;
	}
	return low;
}


void solve(int N) {
	poss.resize(N+1);
	int n = 1;
	int res = binSearch(1, N, N-1);
	poss[res] = {N};
	found.push_back(res);
    answer(res, N);
	foundvals.push_back(N);
	while (n < N) {
		int tmp = 0;
		for (int iii = 0; iii < found.size(); iii++) {
			int i = found[iii];
			if (i != N && poss[i+1].size() == 0) {
				tmp++;
				int low, high;
				int diff = query(i, i+1);
				low = poss[i][0]-diff, high = poss[i][0]+diff;
				int c = 0;
				if (low >= 1 && !CONTAINS(foundvals, low)) {
					c++;
					poss[i+1].push_back(low);
				}
				if (high <= N && !CONTAINS(foundvals, high)) {
					c++;
					poss[i+1].push_back(high);
				}
				if (c == 1) {
                    answer(i+1, poss[i+1][0]);
					found.push_back(i+1);
					foundvals.push_back(poss[i+1][0]);
					n++;
				}
			}
			if (i != 1 && poss[i-1].size() == 0) {
				tmp++;
				int low, high;
				int diff = query(i-1, i);
				low = poss[i][0]-diff, high = poss[i][0]+diff;
				int c = 0;
				if (low >= 1 && !CONTAINS(foundvals, low)) {
					c++;
					poss[i-1].push_back(low);
				}
				if (high <= N && !CONTAINS(foundvals, high)) {
					c++;
					poss[i-1].push_back(high);
				}
				if (c == 1) {
                    answer(i-1, poss[i-1][0]);
					found.push_back(i-1);
					foundvals.push_back(poss[i-1][0]);
					n++;
				}
			}
		}
		if (!tmp) {
			for (int iii = 0; iii < found.size(); iii++) {
			    int i = found[iii];
				if (i != 1 && i != N && (poss[i-1].size() > 1 ^ poss[i+1].size() > 1)) {
					bool below = poss[i-1].size() > 1;
					int res = query(i-1, i+1);
					int i0 = i + (below ? 1 : -1);
					int i0i = abs(poss[i][0] - poss[i + (below ? 1 : -1)][0]);
					int ii1 = abs(poss[i][0] - poss[i + (below ? -1 : 1)][0]);
					int corr;
					if (res == i0i || ii1 == res) {
						if (poss[i0][0] > poss[i][0]) 
							corr = max(poss[i + (below ? -1 : 1)][0], poss[i + (below ? -1 : 1)][1]);
						else corr = min(poss[i + (below ? -1 : 1)][0], poss[i + (below ? -1 : 1)][1]);
						
					}
					else {
						if (poss[i0][0] > poss[i][0]) 
							corr = min(poss[i + (below ? -1 : 1)][0], poss[i + (below ? -1 : 1)][1]);
						else corr = max(poss[i + (below ? -1 : 1)][0], poss[i + (below ? -1 : 1)][1]);
					}
					poss[i + (below ? -1 : 1)].clear();
					poss[i + (below ? -1 : 1)].push_back(corr);
					foundvals.push_back(corr);
					found.push_back(i + (below ? -1 : 1));
                    answer(i + (below ? -1 : 1), corr);
					n++;
					break;
				}
			}
		}
	}
}

Compilation message

xylophone.cpp: In function 'void solve(int)':
xylophone.cpp:40:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |   for (int iii = 0; iii < found.size(); iii++) {
      |                     ~~~~^~~~~~~~~~~~~~
xylophone.cpp:86:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   86 |    for (int iii = 0; iii < found.size(); iii++) {
      |                      ~~~~^~~~~~~~~~~~~~
xylophone.cpp:88:47: warning: suggest parentheses around comparison in operand of '^' [-Wparentheses]
   88 |     if (i != 1 && i != N && (poss[i-1].size() > 1 ^ poss[i+1].size() > 1)) {
      |                              ~~~~~~~~~~~~~~~~~^~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB Output is correct
2 Correct 0 ms 208 KB Output is correct
3 Correct 1 ms 208 KB Output is correct
4 Correct 1 ms 208 KB Output is correct
5 Correct 1 ms 300 KB Output is correct
6 Correct 2 ms 208 KB Output is correct
7 Correct 1 ms 208 KB Output is correct
8 Correct 1 ms 208 KB Output is correct
9 Correct 1 ms 208 KB Output is correct
10 Correct 1 ms 304 KB Output is correct
11 Correct 1 ms 208 KB Output is correct
12 Correct 2 ms 208 KB Output is correct
13 Correct 2 ms 208 KB Output is correct
14 Correct 2 ms 208 KB Output is correct
15 Correct 1 ms 208 KB Output is correct

Subtask #2
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB Output is correct
2 Correct 0 ms 208 KB Output is correct
3 Correct 1 ms 208 KB Output is correct
4 Correct 1 ms 208 KB Output is correct
5 Correct 1 ms 300 KB Output is correct
6 Correct 2 ms 208 KB Output is correct
7 Correct 1 ms 208 KB Output is correct
8 Correct 1 ms 208 KB Output is correct
9 Correct 1 ms 208 KB Output is correct
10 Correct 1 ms 304 KB Output is correct
11 Correct 1 ms 208 KB Output is correct
12 Correct 2 ms 208 KB Output is correct
13 Correct 2 ms 208 KB Output is correct
14 Correct 2 ms 208 KB Output is correct
15 Correct 1 ms 208 KB Output is correct
16 Correct 3 ms 208 KB Output is correct
17 Correct 6 ms 316 KB Output is correct
18 Correct 9 ms 348 KB Output is correct
19 Correct 13 ms 356 KB Output is correct
20 Correct 14 ms 344 KB Output is correct
21 Correct 8 ms 344 KB Output is correct
22 Correct 12 ms 344 KB Output is correct
23 Correct 8 ms 356 KB Output is correct
24 Correct 8 ms 336 KB Output is correct
25 Correct 10 ms 356 KB Output is correct
26 Correct 13 ms 336 KB Output is correct
27 Correct 14 ms 340 KB Output is correct
28 Correct 9 ms 336 KB Output is correct
29 Correct 13 ms 340 KB Output is correct
30 Correct 13 ms 352 KB Output is correct

Subtask #3
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB Output is correct
2 Correct 0 ms 208 KB Output is correct
3 Correct 1 ms 208 KB Output is correct
4 Correct 1 ms 208 KB Output is correct
5 Correct 1 ms 300 KB Output is correct
6 Correct 2 ms 208 KB Output is correct
7 Correct 1 ms 208 KB Output is correct
8 Correct 1 ms 208 KB Output is correct
9 Correct 1 ms 208 KB Output is correct
10 Correct 1 ms 304 KB Output is correct
11 Correct 1 ms 208 KB Output is correct
12 Correct 2 ms 208 KB Output is correct
13 Correct 2 ms 208 KB Output is correct
14 Correct 2 ms 208 KB Output is correct
15 Correct 1 ms 208 KB Output is correct
16 Correct 3 ms 208 KB Output is correct
17 Correct 6 ms 316 KB Output is correct
18 Correct 9 ms 348 KB Output is correct
19 Correct 13 ms 356 KB Output is correct
20 Correct 14 ms 344 KB Output is correct
21 Correct 8 ms 344 KB Output is correct
22 Correct 12 ms 344 KB Output is correct
23 Correct 8 ms 356 KB Output is correct
24 Correct 8 ms 336 KB Output is correct
25 Correct 10 ms 356 KB Output is correct
26 Correct 13 ms 336 KB Output is correct
27 Correct 14 ms 340 KB Output is correct
28 Correct 9 ms 336 KB Output is correct
29 Correct 13 ms 340 KB Output is correct
30 Correct 13 ms 352 KB Output is correct
31 Correct 30 ms 360 KB Output is correct
32 Correct 23 ms 428 KB Output is correct
33 Correct 54 ms 492 KB Output is correct
34 Correct 69 ms 560 KB Output is correct
35 Correct 56 ms 532 KB Output is correct
36 Correct 50 ms 576 KB Output is correct
37 Correct 36 ms 568 KB Output is correct
38 Correct 39 ms 608 KB Output is correct
39 Correct 93 ms 608 KB Output is correct
40 Correct 63 ms 556 KB Output is correct
41 Correct 66 ms 576 KB Output is correct
42 Correct 46 ms 604 KB Output is correct
43 Correct 36 ms 584 KB Output is correct
44 Correct 45 ms 576 KB Output is correct
45 Correct 76 ms 556 KB Output is correct
46 Correct 84 ms 724 KB Output is correct
47 Correct 72 ms 512 KB Output is correct
48 Correct 80 ms 536 KB Output is correct
49 Correct 70 ms 516 KB Output is correct
50 Correct 91 ms 604 KB Output is correct
51 Correct 79 ms 588 KB Output is correct
52 Correct 78 ms 564 KB Output is correct
53 Correct 63 ms 552 KB Output is correct
54 Correct 76 ms 556 KB Output is correct
55 Correct 78 ms 528 KB Output is correct
56 Correct 70 ms 548 KB Output is correct
57 Correct 78 ms 592 KB Output is correct
58 Correct 63 ms 596 KB Output is correct
59 Correct 67 ms 712 KB Output is correct
60 Correct 65 ms 512 KB Output is correct