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- #include <cmath>
- #include <cstdio>
- #include <vector>
- #include <iostream>
- #include <algorithm>
- using namespace std;
- int main() {
- // 回答開始
- int n;
- cin >> n;
- int x[n];
- // 平均値
- double mean = 0.0;
- for (int i = 0; i < n; i++) {
- cin >> x[i];
- mean += x[i];
- }
- mean /= n;
- cout << mean << endl;
- // メジアン(中央値)
- sort(x, x + n);
- if (n % 2 == 1) {
- cout << x[(n + 1) / 2 - 1] << endl;
- } else {
- cout << (x[n / 2 - 1] + x[n / 2 + 1 - 1]) / 2.0 << endl;
- }
- // モード(最頻値)
- int counter[100000] = {0};
- int max_n = x[0];
- for (int i = 0; i < n; i++) {
- counter[x[i]]++;
- }
- for (int i = x[0]; i < n; i++) {
- if (counter[i] == 0)
- continue;
- if (counter[i] > counter[max_n])
- max_n = i;
- }
- cout << max_n << endl;
- // 回答終了
- return 0;
- }
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