Säähavainnot

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
 
#define TEST_MODE 0

#if TEST_MODE
int a[12];
int b[12];
#endif

float ar[36];

void guess() {
  float dif = 0.1F;
  int depth = 4;
  int mode = 0;

  float nmin = ar[0], nmax = ar[0];
  float slope = 0;
  for (int i=1; i < 24; i++) {
    nmin = min(nmin, ar[i]);
    nmax = max(nmax, ar[i]);
    slope = max(slope, abs(ar[i] - ar[i-1]));
  }
  float nmin2 = ar[18], nmax2 = ar[18];
  for (int i=19; i < 24; i++) {
    nmin2 = min(nmin2, ar[i]);
    nmax2 = max(nmax2, ar[i]);
  }

  int dif1 = abs(nmax - nmin);
  int dif2 = abs(nmax2 - nmin2);
  if (slope > 2.0F) depth = 3;
  if (dif1 < 5.5F && dif2 < 4.F) depth = 5;
  if (dif1 < 4.5F && dif2 < 3.5F) depth = 6;
  if (dif1 < 3.5F && dif2 < 2.5F) {
    depth = 10;
    mode = 1;
  }
  if (dif1 < 3.0F && dif2 < 2.F) {
    depth = 12;
    mode = 1;
  }

  for (int i=0; i < 12; i++) {
    const int i2 = 24+i;
    if (i > depth) {
      ar[i2] = NAN;
      continue;
    }

    float cur = ar[i2-24];
    float pre = ar[i2-1];
 
    if (mode == 1) {
			if (i < 4) {
				cur = pre;
			} else {
				cur = (nmax2+nmin2)*0.5F;
			}
    }
		ar[i2] = abs(cur - pre) > dif ?
			pre + (cur < pre ? -dif : dif) : cur;
  }
  if (ar[21] < ar[22] && ar[22] < ar[23]) {
		ar[24] = ar[23] + dif;
	} else if (ar[21] > ar[22] && ar[22] > ar[23]) {
		ar[24] = ar[23] - dif;
	} else {
		ar[24] = ar[23];
	}
}

int main() {
  #if TEST_MODE
  freopen("data.txt", "r", stdin);
  #endif
  ios_base::sync_with_stdio(0);
  cin.tie(0);

  int n;
  cin >> n;
  for (int i=0; i < n; i++) {
    for (int j=0; j < 24; j++) cin >> ar[j];
    guess();
    for (int j=0; j < 12; j++) {
      float q = ar[j+24];
      #if TEST_MODE
      float ans;
      cin >> ans;
      if (isnan(q)) continue;
      if (abs(q - ans) < 0.75F) a[j]++;
      if (abs(q - ans) > 2.05F) b[j]++;
      #else
      if (isnan(q)) printf("? ");
      else printf("%f ", q);
      #endif
    }
  }
  #if TEST_MODE
  int asum = 0, bsum = 0;
  printf(" i |  a   |  b   | a-b  | %%\n");
  for (int i=0; i < 12; i++) {
    printf("%2d |%5d |%5d |%5d |%.2f\n", i, a[i], b[i], a[i]-b[i], a[i]/(float)n);
    asum += a[i];
    bsum += b[i];
  }
  printf("   |%5d |%5d |%.2f |%.2f\n", asum, bsum, (25.F*(asum-bsum)/n), asum/(float)n);
  #endif
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED