oj.uz

Submission #148778

# Submission time Handle Problem Language Result Execution time Memory
148778 2019-09-01T05:06:08 Z mit한의대지망생(#3602, TAMREF, imeimi2000, suzy) Crosses on the Grid (FXCUP4_cross) C++17
100 / 100
 189 ms 9960 KB 
#include <stdio.h>
#include <algorithm>
#include <vector>
#include <map>

using namespace std;

typedef long long lli;

class p {
public:
	lli a, b;
};

bool cmp(const p &i, const p &j) {
	if(i.a!=j.a) return i.a>j.a;
	else return i.b>j.b;
}

vector<lli> vx;
int n, k, sz=1;
p a[200000];
int bt[1<<19];

void upd(int k, int w) {
	while(k) {
		bt[k]+=w;
		k>>=1;
	}
}

int kth(int k) {
	if(bt[1]<k) return -1;
	int cur=1;
	while(cur<sz) {
		if(bt[cur*2+1]>=k) cur=(cur*2+1);
		else {
			k-=bt[cur*2+1];
			cur=cur*2;
		}
	}
	return cur-sz;
}

long long SelectCross(int K, std::vector<int> I, std::vector<int> O) {
	n=I.size();
	k=K;
	for(int i=0;i<n;i++) {
		a[i].a=I[i];
		a[i].b=O[i];
		vx.push_back(a[i].b);
	}
	if(k==1) {
		lli res=0;
		for(int i=0;i<n;i++) {
			lli w=a[i].b*a[i].b-(a[i].b-a[i].a)*(a[i].b-a[i].a);
			if(w>res) res=w;
		}
		return res;
	}
	sort(vx.begin(),vx.end());
	vx.erase(unique(vx.begin(),vx.end()),vx.end());
	while(sz<vx.size()) sz*=2;
	sort(a,a+n,cmp);
	lli res=0;
	for(int i=0;i<n;i++) {
		int id=lower_bound(vx.begin(),vx.end(),a[i].b)-vx.begin();
		lli y=kth(k-1);
		if(y<0) {
			upd(sz+id,1);
			continue;
		}
		lli x=a[i].a;
		y=min(vx[y],a[i].b);
		lli w=y*y-(y-x)*(y-x);
		if(w>res) res=w;
		upd(sz+id,1);
	}
	return res;
}

Compilation message

cross.cpp: In function 'long long int SelectCross(int, std::vector<int>, std::vector<int>)':
cross.cpp:63:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  while(sz<vx.size()) sz*=2;
        ~~^~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 11 ms 1024 KB Output is correct
6 Correct 98 ms 8292 KB Output is correct
7 Correct 92 ms 8292 KB Output is correct
8 Correct 98 ms 8296 KB Output is correct

Subtask #2
55.0 / 55.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 11 ms 1024 KB Output is correct
6 Correct 98 ms 8292 KB Output is correct
7 Correct 92 ms 8292 KB Output is correct
8 Correct 98 ms 8296 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 6 ms 384 KB Output is correct
12 Correct 15 ms 1152 KB Output is correct
13 Correct 94 ms 5356 KB Output is correct
14 Correct 184 ms 9952 KB Output is correct
15 Correct 184 ms 9960 KB Output is correct
16 Correct 183 ms 9952 KB Output is correct

Subtask #3
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 11 ms 1024 KB Output is correct
6 Correct 98 ms 8292 KB Output is correct
7 Correct 92 ms 8292 KB Output is correct
8 Correct 98 ms 8296 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 6 ms 384 KB Output is correct
12 Correct 15 ms 1152 KB Output is correct
13 Correct 94 ms 5356 KB Output is correct
14 Correct 184 ms 9952 KB Output is correct
15 Correct 184 ms 9960 KB Output is correct
16 Correct 183 ms 9952 KB Output is correct
17 Correct 5 ms 384 KB Output is correct
18 Correct 6 ms 384 KB Output is correct
19 Correct 15 ms 1024 KB Output is correct
20 Correct 91 ms 5356 KB Output is correct
21 Correct 142 ms 8036 KB Output is correct
22 Correct 184 ms 9956 KB Output is correct
23 Correct 187 ms 9704 KB Output is correct
24 Correct 189 ms 9956 KB Output is correct
25 Correct 178 ms 9952 KB Output is correct
26 Correct 177 ms 9948 KB Output is correct