제출 #229942

#제출 시각아이디문제언어결과실행 시간메모리
229942frodakcinEditor (BOI15_edi)C++11
100 / 100
270 ms68728 KiB
#include <cstdio> #include <cstring> #include <set> #include <functional> #include <vector> #include <algorithm> const int MN = 3e5+10; int N, a[MN], b[MN][20], g[MN][20], d[MN]; bool e[MN]; std::set<int, std::greater<int>, std::allocator<int> > f; std::vector<int> c[MN]; void dfs(int n, int v) { d[n]=v; for(int x:c[n]) dfs(x, v); } int main(void) { scanf("%d", &N); for(int i=0;i<N;++i) scanf("%d", a+i); memset(b, -1, sizeof b); for(int i=0,j,x;i<N;++i) { if(a[i]<0) { j=0, x=i-1; for(;~b[x][j];++j); for(--j;j>=0;--j) if(~b[x][j]&&g[x][j] <= a[i]) x=b[x][j]; //printf("%d -> %d\n", i, x); c[x].push_back(i); b[i][0] = x-1, g[i][0]=a[i]; for(j=0;~b[i][j]&&~b[b[i][j]][j];++j) b[i][j+1]=b[b[i][j]][j], g[i][j+1] = std::max(g[i][j], g[b[i][j]][j]); } } for(int i=0;i<N;++i) if(a[i]>=0) dfs(i, i); for(int i=0;i<N;++i) { if(e[d[i]]) f.erase(d[i]); else f.insert(d[i]); e[d[i]]^=1; if(f.empty()) printf("0\n"); else printf("%d\n", a[*f.begin()]); } return 0; }

컴파일 시 표준 에러 (stderr) 메시지

edi.cpp: In function 'int main()':
edi.cpp:21:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &N);
  ~~~~~^~~~~~~~~~
edi.cpp:22:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=0;i<N;++i) scanf("%d", a+i);
                       ~~~~~^~~~~~~~~~~
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