Submission #839822

#	Time	Username	Problem	Language	Result	Execution time	Memory
839822		allin27x	A Plus B (IOI23_aplusb)	C++17	60 / 100	17 ms	3340 KiB

aplusb

#include <bits/stdc++.h>
using namespace std;
#define vi vector<int>

bool check(int s, vi& a, vi& b){
	int n = a.size();
	int prs = 0;
	int j = n-1;
	for (int i=0; i<n; i++){
		for (; j>=0 && b[j]+a[i]>s; j--) ;
		prs += j+1;
	}
	return prs>=n;
}

vi smallest_sums(int n, vi a, vi b){
	unsigned int l = 0, r = 2e9+7;
	while (l<r){
		int m = (l+r)/2;
		if (check(m, a, b)) r = m;
		else l = m+1;
	}
	vi ans(n,0);
	int ind = 0;
	for (int i=0; i<n; i++){
		for (int j=0; j<n && a[i]+b[j]<l; j++) ans[ind++] = a[i] + b[j];
	}
	while (ind < n) ans[ind++] = l;
	sort(ans.begin(), ans.end());
	return ans;
}

Compilation message (stderr)

aplusb.cpp: In function 'std::vector<int> smallest_sums(int, std::vector<int>, std::vector<int>)':
aplusb.cpp:26:33: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} and 'unsigned int' [-Wsign-compare]
   26 |   for (int j=0; j<n && a[i]+b[j]<l; j++) ans[ind++] = a[i] + b[j];

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 30 / 30
• Subtask 4: 0 / 40