oj.uz

Submission #372970

# Submission time Handle Problem Language Result Execution time Memory
372970 2021-03-02T18:44:57 Z luciocf Examination (JOI19_examination) C++14
2 / 100
 3000 ms 265060 KB 
#include <bits/stdc++.h>

#define ff first
#define ss second

using namespace std;

typedef pair<int, int> pii;

const int maxn = 2e5+10;

struct BIT2D
{
	unordered_map<int, int> bit[maxn];

	void upd(int x, int y, int v)
	{
		for (int i = x; i < maxn; i += (i&-i))
			for (int j = y; j < maxn; j += (j&-j))
				bit[i][j] += v;
	}

	int soma(int x, int y)
	{
		int ans = 0;

		for (int i = x; 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, ind;
} query[maxn];

pii a[maxn];
int ans[maxn];

int main(void)
{
	int n, q;
	scanf("%d %d", &n, &q);

	map<int, int> mpx, mpy;

	for (int i = 1; i <= n; i++)
	{
		scanf("%d %d", &a[i].ff, &a[i].ss);

		mpx[a[i].ff] = 0;
		mpy[a[i].ss] = 0;
	}

	for (int i = 1; i <= q; i++)
	{
		scanf("%d %d %d", &query[i].x, &query[i].y, &query[i].z);
		query[i].ind = i;

		mpx[query[i].x] = 0;
		mpy[query[i].y] = 0;
	}

	int aux = 0;
	for (auto &x: mpx)
		x.second = ++aux;

	aux = 0;
	for (auto &x: mpy)
		x.second = ++aux;

	sort(a+1, a+n+1, [&] (pii a, pii b) {return a.ff+a.ss > b.ff+b.ss;});
	sort(query+1, query+q+1, [&] (Query a, Query b) {return a.z > b.z;});

	int ptr = 1;

	for (int i = 1; i <= q; i++)
	{
		while (ptr <= n && a[ptr].ff+a[ptr].ss >= query[i].z)
		{
			BIT.upd(maxn-mpx[a[ptr].ff], maxn-mpy[a[ptr].ss], 1);
			ptr++;
		}

		ans[query[i].ind] = BIT.soma(maxn-mpx[query[i].x], maxn-mpy[query[i].y]);
	}

	for (int i = 1; i <= q; i++)
		printf("%d\n", ans[i]);
}

Compilation message

examination.cpp: In function 'int main()':
examination.cpp:46:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   46 |  scanf("%d %d", &n, &q);
      |  ~~~~~^~~~~~~~~~~~~~~~~
examination.cpp:52:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   52 |   scanf("%d %d", &a[i].ff, &a[i].ss);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
examination.cpp:60:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   60 |   scanf("%d %d %d", &query[i].x, &query[i].y, &query[i].z);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
2.0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 11372 KB Output is correct
2 Correct 8 ms 11372 KB Output is correct
3 Correct 9 ms 11372 KB Output is correct
4 Correct 8 ms 11372 KB Output is correct
5 Correct 8 ms 11372 KB Output is correct
6 Correct 8 ms 11372 KB Output is correct
7 Correct 61 ms 19692 KB Output is correct
8 Correct 61 ms 19692 KB Output is correct
9 Correct 67 ms 19564 KB Output is correct
10 Correct 25 ms 13804 KB Output is correct
11 Correct 25 ms 13824 KB Output is correct
12 Correct 15 ms 11372 KB Output is correct
13 Correct 64 ms 19692 KB Output is correct
14 Correct 67 ms 19692 KB Output is correct
15 Correct 78 ms 19712 KB Output is correct
16 Correct 21 ms 13164 KB Output is correct
17 Correct 21 ms 13164 KB Output is correct
18 Correct 13 ms 11372 KB Output is correct

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3082 ms 265060 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3082 ms 265060 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 11372 KB Output is correct
2 Correct 8 ms 11372 KB Output is correct
3 Correct 9 ms 11372 KB Output is correct
4 Correct 8 ms 11372 KB Output is correct
5 Correct 8 ms 11372 KB Output is correct
6 Correct 8 ms 11372 KB Output is correct
7 Correct 61 ms 19692 KB Output is correct
8 Correct 61 ms 19692 KB Output is correct
9 Correct 67 ms 19564 KB Output is correct
10 Correct 25 ms 13804 KB Output is correct
11 Correct 25 ms 13824 KB Output is correct
12 Correct 15 ms 11372 KB Output is correct
13 Correct 64 ms 19692 KB Output is correct
14 Correct 67 ms 19692 KB Output is correct
15 Correct 78 ms 19712 KB Output is correct
16 Correct 21 ms 13164 KB Output is correct
17 Correct 21 ms 13164 KB Output is correct
18 Correct 13 ms 11372 KB Output is correct
19 Execution timed out 3082 ms 265060 KB Time limit exceeded
20 Halted 0 ms 0 KB -