Submission #307381

#TimeUsernameProblemLanguageResultExecution timeMemory
307381arthur_nascimentoStations (IOI20_stations)C++14
5 / 100
988 ms1048 KiB
#include "stations.h" #include <bits/stdc++.h> using namespace std; #define pb push_back #define debug #define maxn 1010 int ini[maxn]; int fim[maxn]; int h[maxn]; vector<int> L[maxn]; int cur = 0; void dfs(int x,int p=-1){ debug("dfs %d\n",x); ini[x] = cur++; for(int i : L[x]) if(i != p){ h[i] = 1 + h[x]; dfs(i,x); } //fim[x] = cur++; } std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) { cur = 0; for(int i=0;i<n;i++) L[i].clear(), h[i] = ini[i] = fim[i] = 0; for(int i=0;i<n-1;i++){ L[u[i]].pb(v[i]); L[v[i]].pb(u[i]); } for(int i=0;i<n;i++){ if(L[i].size() == 1){ dfs(i); break; } } vector<int> ret; for(int i=0;i<n;i++){ if(h[i]%2 == 0) ret.pb(ini[i]); else ret.pb(ini[i]); } for(int i : ret) debug("%d ",i); debug("\n"); return ret; } int find_next_station(int s, int t, std::vector<int> c) { if(t > s) return s+1; else return s-1; debug("qr %d %d ~",s,t); for(int i : c) debug("%d ",i); debug("\n"); if(c.size() == 1) return c[0]; sort(c.begin(), c.end()); if(s < c[0]){ // S é entrada, c[i] é saida int pai = c[c.size()-1]; if(t < s) return pai; if(c.size() >= 2 && t > c[c.size()-2]) return pai; for(int i=0;i<c.size();i++){ if(t <= c[i]) return c[i]; } } else { // S é saida, c[i] é entrada int pai = c[0]; if(t > s) return pai; if(t < c[1]) return pai; for(int i=1;i<c.size()-1;i++){ if(t < c[i+1]) return c[i]; } return c[c.size()-1]; } }

Compilation message (stderr)

stations.cpp: In function 'void dfs(int, int)':
stations.cpp:14:8: warning: left operand of comma operator has no effect [-Wunused-value]
   14 |  debug("dfs %d\n",x);
      |        ^~~~~~~~~~
stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:47:9: warning: left operand of comma operator has no effect [-Wunused-value]
   47 |   debug("%d ",i);
      |         ^~~~~
stations.cpp:48:8: warning: statement has no effect [-Wunused-value]
   48 |  debug("\n");
      |       ~^~~~~
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:57:8: warning: left operand of comma operator has no effect [-Wunused-value]
   57 |  debug("qr %d %d ~",s,t); for(int i : c) debug("%d ",i); debug("\n");
      |        ^~~~~~~~~~~~
stations.cpp:57:23: warning: right operand of comma operator has no effect [-Wunused-value]
   57 |  debug("qr %d %d ~",s,t); for(int i : c) debug("%d ",i); debug("\n");
      |                       ^
stations.cpp:57:48: warning: left operand of comma operator has no effect [-Wunused-value]
   57 |  debug("qr %d %d ~",s,t); for(int i : c) debug("%d ",i); debug("\n");
      |                                                ^~~~~
stations.cpp:57:64: warning: statement has no effect [-Wunused-value]
   57 |  debug("qr %d %d ~",s,t); for(int i : c) debug("%d ",i); debug("\n");
      |                                                               ~^~~~~
stations.cpp:65:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   65 |   for(int i=0;i<c.size();i++){
      |               ~^~~~~~~~~
stations.cpp:76:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   76 |   for(int i=1;i<c.size()-1;i++){
      |               ~^~~~~~~~~~~
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