Submission #953246

#	Time	Username	Problem	Language	Result	Execution time	Memory
953246		stakaman	Swimming competition (LMIO18_plaukimo_varzybos)	C++14	10 / 100	340 ms	10988 KiB

plaukimo_varzybos

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

bool isValidGrouping(const vector<int>& abilities, int maxDiff, int A, int B) {
    int groupsNeeded = 1, minAbilityInCurrentGroup = abilities[0];
    int membersInCurrentGroup = 1;

    for (int i = 1; i < abilities.size(); ++i) {
        if (abilities[i] - minAbilityInCurrentGroup > maxDiff || membersInCurrentGroup == B) {
            ++groupsNeeded;  // Start a new group
            minAbilityInCurrentGroup = abilities[i];
            membersInCurrentGroup = 1; // Reset member count for new group
        } else {
            ++membersInCurrentGroup; // Add to current group
        }
    }

    return groupsNeeded <= (abilities.size() + A - 1) / A; // Check if grouping is within constraints
}

int findMinimumMaximumDifference(vector<int>& abilities, int A, int B) {
    sort(abilities.begin(), abilities.end());
    int low = 0, high = abilities.back() - abilities.front(), result = high;

    while (low <= high) {
        int mid = low + (high - low) / 2;
        if (isValidGrouping(abilities, mid, A, B)) {
            result = mid;
            high = mid - 1; // Try for a smaller difference
        } else {
            low = mid + 1; // Need a larger difference
        }
    }
    return result;
}

int main() {
    int N, A, B;
    cin >> N >> A >> B;
    vector<int> abilities(N);
    for (int& ability : abilities) {
        cin >> ability;
    }

    cout << findMinimumMaximumDifference(abilities, A, B) << endl;
    return 0;
}

Compilation message (stderr)

plaukimo_varzybos.cpp: In function 'bool isValidGrouping(const std::vector<int>&, int, int, int)':
plaukimo_varzybos.cpp:10:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |     for (int i = 1; i < abilities.size(); ++i) {
      |                     ~~^~~~~~~~~~~~~~~~~~
plaukimo_varzybos.cpp:20:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |     return groupsNeeded <= (abilities.size() + A - 1) / A; // Check if grouping is within constraints
      |            ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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