Submission #1094321

#	Time	Username	Problem	Language	Result	Execution time	Memory
1094321		Sunbae	A Plus B (IOI23_aplusb)	C++17	100 / 100	64 ms	4564 KiB

aplusb

#include <cstdio>
#include <vector>
#include <algorithm>
#include "aplusb.h"
typedef long long ll;
using namespace std;
const int N = 1e5 + 5;
vector<int> smallest_sums(int n, vector<int> A, vector<int> B) {
	ll low = A[0] + B[0], high = A[n-1] + B[n-1], ans;
	while(low <= high){
		ll mid = low + ((high-low)>>1), cnt = 0;
		for(int i = 0; i<n; ++i){
			cnt += upper_bound(B.begin(), B.end(), mid-A[i]) - B.begin();
		}
		if(cnt >= n) high = mid-1, ans = mid;
		else low = mid+1;
	}
	vector<int> v;
	for(int i = 0, m = 0; i<n; ++i){
		for(int j = 0; A[i] + B[j] <= ans && j<n; ++j){
			v.push_back(A[i] + B[j]);
		}
	}
	sort(v.begin(), v.end());
	v.resize(n);
	return v;
}

Compilation message (stderr)

aplusb.cpp: In function 'std::vector<int> smallest_sums(int, std::vector<int>, std::vector<int>)':
aplusb.cpp:19:17: warning: unused variable 'm' [-Wunused-variable]
   19 |  for(int i = 0, m = 0; i<n; ++i){
      |                 ^
aplusb.cpp:20:37: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
   20 |   for(int j = 0; A[i] + B[j] <= ans && j<n; ++j){

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