제출 #802148

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
802148		I_Love_EliskaM_	기지국 (IOI20_stations)	C++14	52.32 / 100	789 ms	904 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
#define forn(i,n) for(int i=0;i<n;++i)
#define pb push_back
#define all(x) x.begin(), x.end()
using ll = long long;

const int N=1e3;
int l[N], r[N];
vector<int> adj[N];
int nxt=0;
void dfs(int u, int p) {
	l[u]=r[u]=nxt++;
	for(auto&v:adj[u]) {
		if (v==p) continue;
		dfs(v,u);
		r[u]=max(r[u],r[v]);
	}
}

vector<int> label(int n, int k, vector<int>u, vector<int> v) {
	forn(i,n) adj[i].clear(); nxt=0;
	forn(i,n-1) {
		adj[u[i]].pb(v[i]);
		adj[v[i]].pb(u[i]);
	}
	dfs(0,-1);
	vector<int> ans(n);
	forn(i,n) ans[i]=l[i]+N*r[i];
	return ans;
}

int find_next_station(int s, int t, vector<int> adj) {
	int l=s%N, r=s/N;
	int lx=t%N, rx=t/N;
	if (l<=lx && rx<=r) {
		for(auto&x:adj) {
			int lq=x%N, rq=x/N;
			if (lq<l) continue;
			if (lq<=lx && rx<=rq) return x;
		}
	} else {
		for(auto&x:adj) {
			int lq=x%N, rq=x/N;
			if (lq<l) return x;
		}
	}
	//assert(0);
	exit(1);
}

컴파일 시 표준 에러 (stderr) 메시지

stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:4:19: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
    4 | #define forn(i,n) for(int i=0;i<n;++i)
      |                   ^~~
stations.cpp:23:2: note: in expansion of macro 'forn'
   23 |  forn(i,n) adj[i].clear(); nxt=0;
      |  ^~~~
stations.cpp:23:28: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   23 |  forn(i,n) adj[i].clear(); nxt=0;
      |                            ^~~
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:45:16: warning: unused variable 'rq' [-Wunused-variable]
   45 |    int lq=x%N, rq=x/N;
      |                ^~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 8
• Subtask 3: 16 / 16
• Subtask 4: 10 / 10
• Subtask 5: 26.3205 / 61