#include <iostream>
int marks[1000000];
int main(int argc, char** argv) {
std::ios::sync_with_stdio(false);
int n;
unsigned long long sum = 0;
std::cin >> n;
for (int i = 0; i < n; i++) {
std::cin >> marks[i];
sum += marks[i];
}
int l = 0;
int r = n - 1;
float target = 2 * n + 1;
int parmutations = 0;
float median = sum / n;
float epsilion = 0.00001f;
if (median * 2 + 1 == target)
parmutations++;
while (l < r) {
if (marks[l] < marks[r]) {
sum -= marks[l];
n--;
median = static_cast<float>(sum) / n;
if (abs(target - median * 2 - n) <= epsilion)
parmutations++;
l++;
}
else {
sum -= marks[r];
n--;
median = static_cast<float>(sum) / n;
if (abs(target - median * 2 - n) <= epsilion)
parmutations++;
r--;
}
}
std::cout << target << " " << parmutations;
}
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 | #include <iostream> int marks[1000000]; int main(int argc, char** argv) { std::ios::sync_with_stdio(false); int n; unsigned long long sum = 0; std::cin >> n; for (int i = 0; i < n; i++) { std::cin >> marks[i]; sum += marks[i]; } int l = 0; int r = n - 1; float target = 2 * n + 1; int parmutations = 0; float median = sum / n; float epsilion = 0.00001f; if (median * 2 + 1 == target) parmutations++; while (l < r) { if (marks[l] < marks[r]) { sum -= marks[l]; n--; median = static_cast<float>(sum) / n; if (abs(target - median * 2 - n) <= epsilion) parmutations++; l++; } else { sum -= marks[r]; n--; median = static_cast<float>(sum) / n; if (abs(target - median * 2 - n) <= epsilion) parmutations++; r--; } } std::cout << target << " " << parmutations; } |
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