oj.uz

Submission #486928

# Submission time Handle Problem Language Result Execution time Memory
486928 2021-11-13T11:58:23 Z jamezzz Road Construction (JOI21_road_construction) C++17
6 / 100
 363 ms 12456 KB 
#include <bits/stdc++.h>
using namespace std;

#define int long long

#ifdef DEBUG
#define dbg(...) printf(__VA_ARGS__);
#else
#define dbg(...)
#endif
#define sf scanf
#define pf printf
#define fi first
#define se second
#define pb emplace_back
#define sz(x) (int)x.size()
#define mnto(x,y) x=min(x,(__typeof__(x))y)
#define mxto(x,y) x=max(x,(__typeof__(x))y)
#define INF 2023456789
#define LINF 1023456789123456789
#define all(x) x.begin(), x.end()
typedef long long ll;
typedef long double ld;
typedef pair<int, int> ii;
typedef pair<ll, ll> pll;
typedef tuple<int, int, int> iii;
typedef tuple<int, int, int, int> iiii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<pll> vll;
mt19937 rng(time(0));

#define maxn 250005

int n,k,x,y;
vi ans;
vii v;
set<ii> s;

int num(int d){
	s.clear();
	ans.clear();
	int l=0;
	for(int i=0;i<n;++i){
		while(v[l].fi+d<v[i].fi)s.erase({v[l].se,l++});
		auto it=s.lower_bound({v[i].se-d,-LINF});
		while(it!=s.end()){
			if(v[i].se+d>=it->fi){
				ans.pb(max(abs(v[i].fi-v[it->se].fi),abs(v[i].se-v[it->se].se)));
				++it;
			}
			else break;
			if(sz(ans)==k)break;
		}
		if(sz(ans)==k)break;
		s.insert({v[i].se,i});
	}
	return sz(ans);
}

main(){
	sf("%lld%lld",&n,&k);
	for(int i=0;i<n;++i){
		sf("%lld%lld",&x,&y);
		v.pb(x+y,x-y);
	}
	sort(all(v));
	int lo=1,hi=2000000000,mid,res;
	while(lo<=hi){
		mid=lo+(hi-lo)/2;
		if(num(mid)>=k)res=mid,hi=mid-1;
		else lo=mid+1;
	}
	num(res-1);
	sort(all(ans));
	while(sz(ans)!=k)ans.pb(res);
	for(int i:ans)pf("%lld\n",i);
}

Compilation message

road_construction.cpp: In function 'long long int num(long long int)':
road_construction.cpp:45:45: warning: operation on 'l' may be undefined [-Wsequence-point]
   45 |   while(v[l].fi+d<v[i].fi)s.erase({v[l].se,l++});
      |                                            ~^~
road_construction.cpp: At global scope:
road_construction.cpp:61:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   61 | main(){
      | ^~~~
road_construction.cpp: In function 'int main()':
road_construction.cpp:62:4: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   62 |  sf("%lld%lld",&n,&k);
      |    ^
road_construction.cpp:64:5: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   64 |   sf("%lld%lld",&x,&y);
      |     ^

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 116 ms 4952 KB Output is correct
2 Correct 127 ms 4996 KB Output is correct
3 Incorrect 77 ms 4408 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 363 ms 9368 KB Output is correct
2 Correct 345 ms 9384 KB Output is correct
3 Correct 89 ms 4832 KB Output is correct
4 Correct 293 ms 12148 KB Output is correct
5 Correct 288 ms 12308 KB Output is correct
6 Correct 271 ms 12456 KB Output is correct
7 Correct 262 ms 11760 KB Output is correct

Subtask #3
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 250 ms 4404 KB Output is correct
2 Correct 296 ms 4404 KB Output is correct
3 Incorrect 0 ms 204 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 250 ms 4404 KB Output is correct
2 Correct 296 ms 4404 KB Output is correct
3 Incorrect 0 ms 204 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 116 ms 4952 KB Output is correct
2 Correct 127 ms 4996 KB Output is correct
3 Incorrect 77 ms 4408 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 116 ms 4952 KB Output is correct
2 Correct 127 ms 4996 KB Output is correct
3 Incorrect 77 ms 4408 KB Output isn't correct
4 Halted 0 ms 0 KB -