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답안 #373192

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
373192 2021-03-03T17:01:15 Z LucaDantas Examination (JOI19_examination) C++17
100 / 100
 580 ms 51420 KB 
#include<cstdio>
#include<vector>
#include <algorithm>
#include<utility>

constexpr int maxn = 1e5+10, B = 1000, maxB = 110; // block sz

struct BIT
{
	int bit[maxB][maxn], n; // x, y
	void upd(int x, int y) {
		// puts("A");
		for(int i = x+1; i < maxB; i += i&-i)
			for(int j = y; j < maxn; j += j&-j)
				bit[i][j]++;
		// puts("B");
	}
	int query(int x, int y) {
		int ans = 0;
		for(int i = x+1; i > 0; i -= i&-i)
			for(int j = y; j > 0; j -= j&-j)
				ans += bit[i][j];
		return ans;
	}
} bit;

struct Query
{
	int x, y, z, id;
	Query(int a, int b, int c, int sla) : x(a), y(b), z(c), id(sla) {}
	Query() {}
} queries[maxn];

struct Pt
{
	int x, y, sum;
	Pt(int a, int b) : x(a), y(b), sum(a+b) {}
	Pt() {}
} a[maxn];

std::vector<std::pair<int,int>> comp[2]; // comprimir x e y
std::vector<Pt> bloco[maxB];

int ans[maxn];

int main() {
	int n, q; scanf("%d %d", &n, &q);
	for(int i = 0, x, y; i < n; i++) {
		scanf("%d %d", &x, &y);
		a[i] = Pt(x, y);
		comp[0].push_back({x, i});
		comp[1].push_back({y, i});
	}
	std::sort(comp[0].begin(), comp[0].end());
	std::sort(comp[1].begin(), comp[1].end());
	for(int i = 0; i < q; i++) {
		int x, y, z; scanf("%d %d %d", &x, &y, &z);
		auto l = lower_bound(comp[0].begin(), comp[0].end(), std::pair<int,int>(x, -1));
		x = (int)(l - comp[0].begin() + 1);
		l = lower_bound(comp[1].begin(), comp[1].end(), std::pair<int,int>(y, -1));
		y = (int)(l - comp[1].begin() + 1);
		queries[i] = Query(x, y, z, i);
		// printf("%d %d %d\n", x, y, z);
	}
	for(int i = 0; i < (int)comp[0].size(); i++)
		a[comp[0][i].second].x = i+1;
	for(int i = 0; i < (int)comp[1].size(); i++)
		a[comp[1][i].second].y = i+1;

	std::sort(a, a+n, [](Pt x, Pt y){ return x.sum > y.sum; });
	std::sort(queries, queries+q, [](Query x, Query y){ return x.z > y.z; });
	for(int i = 0, ptr = 0; i < q; i++) {
		for(; ptr < n && a[ptr].sum >= queries[i].z; ptr++)
			bit.upd(a[ptr].x / B, a[ptr].y), bloco[a[ptr].x / B].push_back(a[ptr]);

		// query na bit
		ans[queries[i].id] = ptr + bit.query((queries[i].x / B), queries[i].y-1)
		- bit.query(maxB - 2, queries[i].y-1) - bit.query((queries[i].x / B), maxn-1);
		// // brute no meu block (tem <= 100 elementos)
		for(Pt x : bloco[queries[i].x / B])
			if(x.x >= queries[i].x && x.y >= queries[i].y) ++ans[queries[i].id];
	}

	for(int i = 0; i < q; i++)
		printf("%d\n", ans[i]);
	// debug
	// for(int i = 0; i < n; i++)
	// 	printf("%d %d %d\n", a[i].x, a[i].y, a[i].sum);
}

Compilation message

examination.cpp: In function 'int main()':
examination.cpp:47:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   47 |  int n, q; scanf("%d %d", &n, &q);
      |            ~~~~~^~~~~~~~~~~~~~~~~
examination.cpp:49:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   49 |   scanf("%d %d", &x, &y);
      |   ~~~~~^~~~~~~~~~~~~~~~~
examination.cpp:57:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   57 |   int x, y, z; scanf("%d %d %d", &x, &y, &z);
      |                ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
2.0 / 2.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 620 KB Output is correct
2 Correct 1 ms 620 KB Output is correct
3 Correct 1 ms 620 KB Output is correct
4 Correct 1 ms 620 KB Output is correct
5 Correct 1 ms 620 KB Output is correct
6 Correct 1 ms 620 KB Output is correct
7 Correct 10 ms 1004 KB Output is correct
8 Correct 10 ms 1004 KB Output is correct
9 Correct 10 ms 1004 KB Output is correct
10 Correct 10 ms 1004 KB Output is correct
11 Correct 8 ms 1004 KB Output is correct
12 Correct 8 ms 876 KB Output is correct
13 Correct 14 ms 1004 KB Output is correct
14 Correct 14 ms 1004 KB Output is correct
15 Correct 14 ms 1004 KB Output is correct
16 Correct 7 ms 1004 KB Output is correct
17 Correct 7 ms 1004 KB Output is correct
18 Correct 4 ms 876 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 474 ms 49028 KB Output is correct
2 Correct 474 ms 49112 KB Output is correct
3 Correct 471 ms 49112 KB Output is correct
4 Correct 574 ms 48216 KB Output is correct
5 Correct 373 ms 48344 KB Output is correct
6 Correct 337 ms 30492 KB Output is correct
7 Correct 435 ms 48872 KB Output is correct
8 Correct 580 ms 48984 KB Output is correct
9 Correct 540 ms 48852 KB Output is correct
10 Correct 243 ms 48092 KB Output is correct
11 Correct 285 ms 48088 KB Output is correct
12 Correct 129 ms 10712 KB Output is correct

Subtask #3
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 474 ms 49028 KB Output is correct
2 Correct 474 ms 49112 KB Output is correct
3 Correct 471 ms 49112 KB Output is correct
4 Correct 574 ms 48216 KB Output is correct
5 Correct 373 ms 48344 KB Output is correct
6 Correct 337 ms 30492 KB Output is correct
7 Correct 435 ms 48872 KB Output is correct
8 Correct 580 ms 48984 KB Output is correct
9 Correct 540 ms 48852 KB Output is correct
10 Correct 243 ms 48092 KB Output is correct
11 Correct 285 ms 48088 KB Output is correct
12 Correct 129 ms 10712 KB Output is correct
13 Correct 377 ms 49608 KB Output is correct
14 Correct 458 ms 49312 KB Output is correct
15 Correct 492 ms 49112 KB Output is correct
16 Correct 392 ms 48600 KB Output is correct
17 Correct 311 ms 48764 KB Output is correct
18 Correct 330 ms 30296 KB Output is correct
19 Correct 376 ms 49496 KB Output is correct
20 Correct 422 ms 49496 KB Output is correct
21 Correct 337 ms 49368 KB Output is correct
22 Correct 239 ms 48088 KB Output is correct
23 Correct 293 ms 47976 KB Output is correct
24 Correct 127 ms 10712 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 620 KB Output is correct
2 Correct 1 ms 620 KB Output is correct
3 Correct 1 ms 620 KB Output is correct
4 Correct 1 ms 620 KB Output is correct
5 Correct 1 ms 620 KB Output is correct
6 Correct 1 ms 620 KB Output is correct
7 Correct 10 ms 1004 KB Output is correct
8 Correct 10 ms 1004 KB Output is correct
9 Correct 10 ms 1004 KB Output is correct
10 Correct 10 ms 1004 KB Output is correct
11 Correct 8 ms 1004 KB Output is correct
12 Correct 8 ms 876 KB Output is correct
13 Correct 14 ms 1004 KB Output is correct
14 Correct 14 ms 1004 KB Output is correct
15 Correct 14 ms 1004 KB Output is correct
16 Correct 7 ms 1004 KB Output is correct
17 Correct 7 ms 1004 KB Output is correct
18 Correct 4 ms 876 KB Output is correct
19 Correct 474 ms 49028 KB Output is correct
20 Correct 474 ms 49112 KB Output is correct
21 Correct 471 ms 49112 KB Output is correct
22 Correct 574 ms 48216 KB Output is correct
23 Correct 373 ms 48344 KB Output is correct
24 Correct 337 ms 30492 KB Output is correct
25 Correct 435 ms 48872 KB Output is correct
26 Correct 580 ms 48984 KB Output is correct
27 Correct 540 ms 48852 KB Output is correct
28 Correct 243 ms 48092 KB Output is correct
29 Correct 285 ms 48088 KB Output is correct
30 Correct 129 ms 10712 KB Output is correct
31 Correct 377 ms 49608 KB Output is correct
32 Correct 458 ms 49312 KB Output is correct
33 Correct 492 ms 49112 KB Output is correct
34 Correct 392 ms 48600 KB Output is correct
35 Correct 311 ms 48764 KB Output is correct
36 Correct 330 ms 30296 KB Output is correct
37 Correct 376 ms 49496 KB Output is correct
38 Correct 422 ms 49496 KB Output is correct
39 Correct 337 ms 49368 KB Output is correct
40 Correct 239 ms 48088 KB Output is correct
41 Correct 293 ms 47976 KB Output is correct
42 Correct 127 ms 10712 KB Output is correct
43 Correct 388 ms 51420 KB Output is correct
44 Correct 381 ms 51288 KB Output is correct
45 Correct 502 ms 51288 KB Output is correct
46 Correct 399 ms 49752 KB Output is correct
47 Correct 323 ms 50044 KB Output is correct
48 Correct 178 ms 30168 KB Output is correct
49 Correct 363 ms 51416 KB Output is correct
50 Correct 408 ms 51160 KB Output is correct
51 Correct 390 ms 51160 KB Output is correct
52 Correct 226 ms 49752 KB Output is correct
53 Correct 296 ms 48728 KB Output is correct