제출 #653903

#제출 시각아이디문제언어결과실행 시간메모리
653903AbdelmagedNour동굴 (IOI13_cave)C++17
100 / 100
372 ms612 KiB
#include <bits/stdc++.h> #include "cave.h" using namespace std; const int N=5005; int s[N],d[N],done[N],now; bool check(int md){ for(int i=0;i<=md;i++)s[i]^=(!done[i]); int x=tryCombination(s); for(int i=0;i<=md;i++)s[i]^=(!done[i]); return x>now||x==-1; } void exploreCave(int n){ for(int i=0;i<n;i++){ now=i; int x=tryCombination(s); for(int j=0;j<n&&(x>i||x==-1);j++)s[j]^=(!done[j]); int l=0,r=n-1,ans; while(l<=r){ int md=(l+r)>>1; if(check(md))r=(ans=md)-1; else l=md+1; } d[ans]=i; done[ans]=1; s[ans]^=1; } answer(s,d); }

컴파일 시 표준 에러 (stderr) 메시지

cave.cpp: In function 'void exploreCave(int)':
cave.cpp:25:15: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
   25 |         s[ans]^=1;
      |         ~~~~~~^~~
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