如何从C++中对的排序向量中获取与给定值相关的对

#include <iostream>
#include <vector>

using namespace std;

vector<pair<int, int>> getPairs(vector<pair<int, int>>& sortedVector, int target) {
    vector<pair<int, int>> result;
    int start = 0;
    int end = sortedVector.size() - 1;

    while (start <= end) {
        int mid = start + (end - start) / 2;

        if (sortedVector[mid].first == target) {
            result.push_back(sortedVector[mid]);
        }

        if (sortedVector[mid].first > target) {
            end = mid - 1;
        } else {
            start = mid + 1;
        }
    }

    return result;
}

int main() {
    vector<pair<int, int>> sortedVector = {{1, 10}, {2, 20}, {3, 30}, {4, 40}, {5, 50}};
    int target = 3;

    vector<pair<int, int>> result = getPairs(sortedVector, target);

    if (result.empty()) {
        cout << "No pairs found." << endl;
    } else {
        cout << "Pairs found: " << endl;
        for (auto pair : result) {
            cout << pair.first << " " << pair.second << endl;
        }
    }

    return 0;
}

Pairs found:
3 30