Submission #197125

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
197125	2020-01-19 05:27:46	arnold518	Railway (BOI17_railway)	C++14	100 / 100	406 ms	33312 KiB

railway

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#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
const int MAXN = 1e5;
int N, M, K;
vector<pii> adj[MAXN+10];
vector<int> A[MAXN+10];
int idx[MAXN+10], cnt, C[MAXN+10];
int par[MAXN+10][30], dep[MAXN+10];
void dfs(int now, int bef, int depth)
{
  par[now][0]=bef; dep[now]=depth;
  idx[now]=++cnt;
  for(auto nxt : adj[now])
  {
    if(nxt.first==bef) continue;
    dfs(nxt.first, now, depth+1);
  }
}
int lca(int u, int v)
{
  int i, j;
  if(dep[u]>dep[v]) swap(u, v);
 
 
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Compilation message (stderr)

railway.cpp: In function 'int lca(int, int)':
railway.cpp:29:9: warning: unused variable 'j' [-Wunused-variable]
  int i, j;
         ^
railway.cpp: In function 'int main()':
railway.cpp:74:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(j=1; j<A[i].size(); j++)
            ~^~~~~~~~~~~~
railway.cpp:84:27: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<int>::size_type {aka long unsigned int}' [-Wformat=]
  printf("%d\n", ans.size());
                 ~~~~~~~~~~^
railway.cpp:53:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d", &N, &M, &K);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~
railway.cpp:57:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &u, &v);
   ~~~~~^~~~~~~~~~~~~~~~
railway.cpp:68:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &p);
   ~~~~~^~~~~~~~~~
railway.cpp:69:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   for(j=0; j<p; j++) { int t; scanf("%d", &t); A[i].push_back(t); }
                               ~~~~~^~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 15 / 15
• Subtask 3: 7 / 7
• Subtask 4: 29 / 29
• Subtask 5: 16 / 16
• Subtask 6: 25 / 25