제출 #380955

#제출 시각아이디문제언어결과실행 시간메모리
380955IwanttobreakfreeFinding Routers (IOI20_routers)C++17
39 / 100
2 ms1260 KiB
#include "routers.h" #include <vector> using namespace std; vector<int> guarda(100000,-1); vector<int> find_routers(int lon, int n, int q) { vector<int> ans(n); ans[0]=0; int l=0,r; for(int i=1;i<n;i++){ r=lon; int sol; while(l<=r){ int mid=(r-l)/2+l,cerc; if(guarda[mid]==-1)cerc=guarda[mid]=use_detector(mid); else cerc=guarda[mid]; if(cerc<i){ l=mid+1; sol=mid; } else{ r=mid-1; } } ans[i]=2*sol-ans[i-1]; l=ans[i]; } return ans; }

컴파일 시 표준 에러 (stderr) 메시지

routers.cpp: In function 'std::vector<int> find_routers(int, int, int)':
routers.cpp:24:10: warning: 'sol' may be used uninitialized in this function [-Wmaybe-uninitialized]
   24 |  ans[i]=2*sol-ans[i-1];
      |         ~^~~~
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