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Submission #292450

# Submission time Handle Problem Language Result Execution time Memory
292450 2020-09-07T02:10:29 Z arnold518 Examination (JOI19_examination) C++14
100 / 100
 641 ms 13788 KB 
#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
 
const int MAXN = 1e5;
 
struct Data
{
	int x, y, p, s;
};
 
int N, Q;
vector<Data> V;
vector<int> comp;
int ans[MAXN+10];
 
int getcomp(int x) { return lower_bound(comp.begin(), comp.end(), x)-comp.begin()+1; }
 
int tree[MAXN+10];
void update(int i, int k) { for(i=N-i+1; i<=N; i+=(i&-i)) tree[i]+=k; }
int query(int i) { int ret=0; for(i=N-i+1; i>0; i-=(i&-i)) ret+=tree[i]; return ret; }
void flush(int i) { for(i=N-i+1; i<=N; i+=(i&-i)) tree[i]=0; }
 
void solve(int l, int r)
{
	if(l==r) return;
	int mid=l+r>>1;
	solve(l, mid);
	solve(mid+1, r);
	vector<Data> L, R;
	for(int i=l; i<=mid; i++) if(V[i].p==0) L.push_back(V[i]);
	for(int i=mid+1; i<=r; i++) if(V[i].p) R.push_back(V[i]);
 
	sort(L.begin(), L.end(), [&](const Data &p, const Data &q) { return p.x>q.x; });
	sort(R.begin(), R.end(), [&](const Data &p, const Data &q) { return p.x>q.x; });
 
	for(int i=0, j=0; i<R.size(); i++)
	{
		for(; j<L.size() && L[j].x>=R[i].x; j++)
		{
			update(getcomp(L[j].y), 1);
		}
		ans[R[i].p]+=query(getcomp(R[i].y));
	}
	for(int j=0; j<L.size(); j++) flush(getcomp(L[j].y));
}
 
int main()
{
	scanf("%d%d", &N, &Q);
	for(int i=1; i<=N; i++)
	{
		int x, y;
		scanf("%d%d", &x, &y);
		V.push_back({x, y, 0, x+y});
		comp.push_back(y);
	}
	for(int i=1; i<=Q; i++)
	{
		int x, y, z;
		scanf("%d%d%d", &x, &y, &z);
		V.push_back({x, y, i, z});
	}
 
	sort(comp.begin(), comp.end());
	comp.erase(unique(comp.begin(), comp.end()), comp.end());
 
	sort(V.begin(), V.end(), [&](const Data &p, const Data &q)
	{
		if(p.s!=q.s) return p.s>q.s;
		return p.p<q.p;
	});
 
	solve(0, V.size()-1);
	for(int i=1; i<=Q; i++) printf("%d\n", ans[i]);
}

Compilation message

examination.cpp: In function 'void solve(int, int)':
examination.cpp:30:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   30 |  int mid=l+r>>1;
      |          ~^~
examination.cpp:40:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Data>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |  for(int i=0, j=0; i<R.size(); i++)
      |                    ~^~~~~~~~~
examination.cpp:42:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Data>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |   for(; j<L.size() && L[j].x>=R[i].x; j++)
      |         ~^~~~~~~~~
examination.cpp:48:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Data>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |  for(int j=0; j<L.size(); j++) flush(getcomp(L[j].y));
      |               ~^~~~~~~~~
examination.cpp: In function 'int main()':
examination.cpp:53:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   53 |  scanf("%d%d", &N, &Q);
      |  ~~~~~^~~~~~~~~~~~~~~~
examination.cpp:57:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   57 |   scanf("%d%d", &x, &y);
      |   ~~~~~^~~~~~~~~~~~~~~~
examination.cpp:64:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   64 |   scanf("%d%d%d", &x, &y, &z);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
2.0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 0 ms 256 KB Output is correct
7 Correct 12 ms 768 KB Output is correct
8 Correct 12 ms 768 KB Output is correct
9 Correct 12 ms 768 KB Output is correct
10 Correct 8 ms 640 KB Output is correct
11 Correct 11 ms 640 KB Output is correct
12 Correct 6 ms 640 KB Output is correct
13 Correct 11 ms 768 KB Output is correct
14 Correct 11 ms 768 KB Output is correct
15 Correct 11 ms 768 KB Output is correct
16 Correct 8 ms 732 KB Output is correct
17 Correct 7 ms 640 KB Output is correct
18 Correct 4 ms 640 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 498 ms 9736 KB Output is correct
2 Correct 500 ms 9692 KB Output is correct
3 Correct 497 ms 9820 KB Output is correct
4 Correct 259 ms 9436 KB Output is correct
5 Correct 404 ms 9692 KB Output is correct
6 Correct 216 ms 9436 KB Output is correct
7 Correct 487 ms 9692 KB Output is correct
8 Correct 476 ms 9928 KB Output is correct
9 Correct 473 ms 9820 KB Output is correct
10 Correct 352 ms 9692 KB Output is correct
11 Correct 207 ms 9436 KB Output is correct
12 Correct 161 ms 9436 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 498 ms 9736 KB Output is correct
2 Correct 500 ms 9692 KB Output is correct
3 Correct 497 ms 9820 KB Output is correct
4 Correct 259 ms 9436 KB Output is correct
5 Correct 404 ms 9692 KB Output is correct
6 Correct 216 ms 9436 KB Output is correct
7 Correct 487 ms 9692 KB Output is correct
8 Correct 476 ms 9928 KB Output is correct
9 Correct 473 ms 9820 KB Output is correct
10 Correct 352 ms 9692 KB Output is correct
11 Correct 207 ms 9436 KB Output is correct
12 Correct 161 ms 9436 KB Output is correct
13 Correct 581 ms 7752 KB Output is correct
14 Correct 586 ms 11764 KB Output is correct
15 Correct 506 ms 12252 KB Output is correct
16 Correct 306 ms 9564 KB Output is correct
17 Correct 492 ms 9824 KB Output is correct
18 Correct 229 ms 9564 KB Output is correct
19 Correct 586 ms 10744 KB Output is correct
20 Correct 619 ms 11004 KB Output is correct
21 Correct 598 ms 10588 KB Output is correct
22 Correct 352 ms 11356 KB Output is correct
23 Correct 207 ms 11104 KB Output is correct
24 Correct 161 ms 10460 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 0 ms 256 KB Output is correct
7 Correct 12 ms 768 KB Output is correct
8 Correct 12 ms 768 KB Output is correct
9 Correct 12 ms 768 KB Output is correct
10 Correct 8 ms 640 KB Output is correct
11 Correct 11 ms 640 KB Output is correct
12 Correct 6 ms 640 KB Output is correct
13 Correct 11 ms 768 KB Output is correct
14 Correct 11 ms 768 KB Output is correct
15 Correct 11 ms 768 KB Output is correct
16 Correct 8 ms 732 KB Output is correct
17 Correct 7 ms 640 KB Output is correct
18 Correct 4 ms 640 KB Output is correct
19 Correct 498 ms 9736 KB Output is correct
20 Correct 500 ms 9692 KB Output is correct
21 Correct 497 ms 9820 KB Output is correct
22 Correct 259 ms 9436 KB Output is correct
23 Correct 404 ms 9692 KB Output is correct
24 Correct 216 ms 9436 KB Output is correct
25 Correct 487 ms 9692 KB Output is correct
26 Correct 476 ms 9928 KB Output is correct
27 Correct 473 ms 9820 KB Output is correct
28 Correct 352 ms 9692 KB Output is correct
29 Correct 207 ms 9436 KB Output is correct
30 Correct 161 ms 9436 KB Output is correct
31 Correct 581 ms 7752 KB Output is correct
32 Correct 586 ms 11764 KB Output is correct
33 Correct 506 ms 12252 KB Output is correct
34 Correct 306 ms 9564 KB Output is correct
35 Correct 492 ms 9824 KB Output is correct
36 Correct 229 ms 9564 KB Output is correct
37 Correct 586 ms 10744 KB Output is correct
38 Correct 619 ms 11004 KB Output is correct
39 Correct 598 ms 10588 KB Output is correct
40 Correct 352 ms 11356 KB Output is correct
41 Correct 207 ms 11104 KB Output is correct
42 Correct 161 ms 10460 KB Output is correct
43 Correct 641 ms 12716 KB Output is correct
44 Correct 632 ms 12680 KB Output is correct
45 Correct 628 ms 13788 KB Output is correct
46 Correct 312 ms 10716 KB Output is correct
47 Correct 523 ms 11228 KB Output is correct
48 Correct 216 ms 7388 KB Output is correct
49 Correct 616 ms 13760 KB Output is correct
50 Correct 611 ms 12764 KB Output is correct
51 Correct 594 ms 13660 KB Output is correct
52 Correct 462 ms 10912 KB Output is correct
53 Correct 215 ms 11996 KB Output is correct