Submission #1040834

#	Time	Username	Problem	Language	Result	Execution time	Memory
1040834		nightfal	Comparing Plants (IOI20_plants)	C++14	0 / 100	1 ms	348 KiB

plants

#include "plants.h"
static std:: vector<int> inc,dec;
static int k;

void init(int k, std::vector<int> r) {
    int n = r.size();
	if(k==2) {
      inc.resize(n); dec.resize(n);
      for(int i=0; i<n; i++) {inc[i] = dec[i] = i;}
      int s,incVal,decVal;
      for(s=2*n-1; s>=0; s--) {
        if (r[s%n]==0) incVal = s;
        else decVal = s;
        inc[s%n] = incVal; dec[s%n] = decVal;
      }
    }
	return;
}
int subtask1(int x, int y) {
    int n = inc.size();
    if (y <= dec[x] or x+n <= inc[y]) return 1;
    else if (y <= inc[x] or x+n <= dec[y]) return -1;
	return 0;
}
int compare_plants(int x, int y) {
  	if (k==2) return subtask1(x,y);
	return 0;
}

Compilation message (stderr)

plants.cpp: In function 'void init(int, std::vector<int>)':
plants.cpp:14:37: warning: 'decVal' may be used uninitialized in this function [-Wmaybe-uninitialized]
   14 |         inc[s%n] = incVal; dec[s%n] = decVal;
plants.cpp:14:18: warning: 'incVal' may be used uninitialized in this function [-Wmaybe-uninitialized]
   14 |         inc[s%n] = incVal; dec[s%n] = decVal;

• 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