Submission #805668

#	Time	Username	Problem	Language	Result	Execution time	Memory
805668		Jkap	Comparing Plants (IOI20_plants)	C++14	0 / 100	1 ms	308 KiB

plants

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define si unordered_set<int>
#define vi vector<int>

int di[200005];
int ri[200005];

void init(int k, vi r) {
  int x, n = r.size();

  for (int i=n-1; i>=0; i--) {
    if (r[i] != r[n-1]) {
      x = i+1;
      break;
    }
  }
  int curr = x;
  for (int i=x+n-1; i>=x; i--) {
    if (r[i%n] == r[curr]) {
      curr = (i+1) %n;
    }
    di[i%n] = curr;
    ri[i%n] = r[i%n];
  }
  
}

int compare_plants(int x, int y) {
    int a = min(x, y), b = max(x, y), out=-1;
    if (di[a] >= b) {
        out = 1-ri[a];
    }
    else if (di[b] < b && di[b] >=a) {
        out = 1-ri[b];
    }
    if (out == -1) {
        return 0;
    }
    if (y==a) {
        out = 1-out;
    }
    if (out == 0) {
        out --;
    }
    return out;
    
}

Compilation message (stderr)

plants.cpp: In function 'void init(int, std::vector<int>)':
plants.cpp:11:7: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
   11 |   int x, n = r.size();
      |       ^

• Subtask 1: 0 / 5
• Subtask 2: 0 / 14
• Subtask 3: 0 / 13
• Subtask 4: 0 / 17
• Subtask 5: 0 / 11
• Subtask 6: 0 / 15
• Subtask 7: 0 / 25