제출 #548710

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
548710	2022-04-14 10:23:55	nonsensenonsense1	Jail (JOI22_jail)	C++17	61 / 100	5041 ms	28872 KiB

jail

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#include <cstdio>
#include <cstring>
#include <vector>
const int N = 120000;
const int LG = 17;
int n, q, m, s[N], t[N], l[N], in[N], out[N], f[LG][N], u[N];
std::vector<int> g[N];
void dfs(int v) {
  static int dt = 0;
  in[v] = dt++;
  for (int i = 0; i < (int)g[v].size(); ++i) if (g[v][i] != f[0][v]) {
    f[0][g[v][i]] = v;
    dfs(g[v][i]);
  }
  out[v] = dt;
}
bool par(int u, int v) {
  return in[u] <= in[v] && out[u] >= out[v];
}
int lca(int u, int v) {
  if (par(u, v)) return u;
  for (int i = LG - 1; i >= 0; --i) if (!par(f[i][u], v)) u = f[i][u];
  return f[0][u];
}
bool on(int x, int i) {
 
 
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컴파일 시 표준 에러 (stderr) 메시지

jail.cpp: In function 'bool dfs1(int)':
jail.cpp:37:38: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   37 |   if (u[g[v][i]] == 1 || !u[g[v][i]] && !dfs1(g[v][i])) return 0;
      |                          ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
jail.cpp: In function 'int main()':
jail.cpp:43:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 |  scanf("%d", &q);
      |  ~~~~~^~~~~~~~~~
jail.cpp:45:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   45 |   scanf("%d", &n);
      |   ~~~~~^~~~~~~~~~
jail.cpp:49:9: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   49 |    scanf("%d%d", &a, &b);
      |    ~~~~~^~~~~~~~~~~~~~~~
jail.cpp:57:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   57 |   scanf("%d", &m);
      |   ~~~~~^~~~~~~~~~
jail.cpp:59:9: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 |    scanf("%d%d", s + i, t + i);
      |    ~~~~~^~~~~~~~~~~~~~~~~~~~~~

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