#include <iostream>
#include <vector>
#include <map>

std::map<double, int> roadStarts;


std::vector<int> getRoadIndexes(double position) {
    auto it = roadStarts.lower_bound(position);
    if (it->first == position) {
        return {it->second - 1, it->second};
    }
    return {it->second};
}

bool isDuoLineRoad(int index) {

}

int main() {
    int T, R, K, L = 0;
    std::cin >> T >> R >> K;
    std::vector<int> road(K + 2, 0);
    for (int i = 1; i <= K; ++i) {
        std::cin >> road[i];
        roadStarts[L] = i;
        L += road[i];
    }
    roadStarts[L] = K + 1;
    double A = 0;
    double B = L;
    while (true) {
        double meetingTime = (B - A) / 2;
        double meetingPlace = meetingTime + A;
        auto meetingRoadIndexes = getRoadIndexes(meetingPlace);
        if (meetingRoadIndexes.size()) {

        }
    }

}