Säähavainnot

input/code.cpp: In function 'int main()':
input/code.cpp:10:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |     freopen("input.txt", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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

int a = 0; // testing values
int b = 0;

int main() {
    freopen("input.txt", "r", stdin);

    int n;
    cin >> n;
    
    vector<vector<float>> data(n);

    vector<vector<float>> answers(n); // testing on example data

    for (int i = 0; i < n; i++) {
        for (int j = 0; j < 24; j++) {
            float value; cin >> value;
            data[i].push_back(value);
        }
        for (int j = 0; j < 12; j++) {
            float value; cin >> value;
            answers[i].push_back(value);
        }
    }

    int i = 0;
    int k = 4;

    for (vector<float> day : data) {
        //cout << "    DAY: " << i << "\n";
        float before = day[23];

        float trend = 0;
        for (int j = 1; j < k; ++j) {
            trend += (day[j] - day[j - 1]);
        }
        trend = trend / k;
        //cout << "  Trend: " << trend << "\n";

        for (int j = 0; j < k; ++j) {
            float newtemp = before + trend;
            cout << fixed << setprecision(1) << newtemp << " ";
            float diff = newtemp - answers[i][j];
            if (abs(diff) <= 0.75) {
                ++a;
            }
            else if (abs(diff) >= 2.05) {
                ++b;
            }
            //cout << newtemp << " " << answers[i][j] << "\n";
            //cout << diff << "\n";
            before = newtemp;
        }
        for (int j = 0; j < 12 - k; ++j) {
            cout << "? ";
        }
        cout << "\n";
        i++;
    }
    //cout << "A: " << a << "\nB: " << b;
}

Test 1

Verdict: RUNTIME ERROR

terminate called after throwing an instance of 'std::bad_alloc'
  what():  std::bad_alloc

Test 2

Verdict: RUNTIME ERROR

terminate called after throwing an instance of 'std::bad_alloc'
  what():  std::bad_alloc

Test 3

Verdict: RUNTIME ERROR

terminate called after throwing an instance of 'std::bad_alloc'
  what():  std::bad_alloc

Test 4

Verdict: RUNTIME ERROR

terminate called after throwing an instance of 'std::bad_alloc'
  what():  std::bad_alloc

Test 5

Verdict: RUNTIME ERROR

terminate called after throwing an instance of 'std::bad_alloc'
  what():  std::bad_alloc

Test 6

Verdict: RUNTIME ERROR

terminate called after throwing an instance of 'std::bad_alloc'
  what():  std::bad_alloc

Test 7

Verdict: RUNTIME ERROR

terminate called after throwing an instance of 'std::bad_alloc'
  what():  std::bad_alloc

Test 8

Verdict: RUNTIME ERROR

terminate called after throwing an instance of 'std::bad_alloc'
  what():  std::bad_alloc