제출 #1053983

#제출 시각아이디문제언어결과실행 시간메모리
1053983nightfal기지국 (IOI20_stations)C++17
컴파일 에러
0 ms0 KiB
// #include "stations.h" #include <cstdio> #include <iostream> #include <cassert> #include <map> #include <vector> #include <algorithm> using namespace std; template <typename T> void print(T elem) {cout << elem << " ";} template <typename T> void print(vector<T> &v) {for(auto elem: v) print(elem); cout << endl;}; template <typename T> void print(vector<vector<T>> &v) {for(auto elem: v) print(elem); cout << endl;}; bool subtask1(vector<vector<int>> &g) { int n = g.size(); for(auto elem: g) if (elem.size() > 2) return false; if (k==1'000) return true; else return false; } bool subtask2(vector<int> &u, vector<int> &v) { int m = u.size(); for(int i=0; i<m; i++) if (!(u[i]==i+1 && v[i]==i/2 || u[i]==i/2 && v[i]==i+1)) return false; if (k==1'000) return true; else return false; } bool subtask3(vector<vector<int>> &g) { int n=g.size(), cnt=0; for(auto elem: g) if(elem.size()>2) cnt++; if (cnt==1 && k==1'000'000) return true; return false; } bool subtask4(int n, int k) { if (n<=8 && k==1'000'000'000) return true; else return false; } void genLabels(int key, int node, vector<int> &labels, vector<vector<int>> &g) { labels[node]=key*1000+1; for(int i=2; i<1000; i++) { bool terminal = true; for(int next: g[node]) { if(labels[next]==-1) {labels[next] = 1000*key+i; node = next; terminal=false;} } if (terminal) return; } } std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) { std::vector<int> labels(n,-1); vector<vector<int>> g(n); for (int i=0; i<n-1; i++) { g[u[i]].push_back(v[i]); g[v[i]].push_back(u[i]); } if (subtask3(g)) { int root = 0; for(int i=0; i<n; i++) if(g[i].size() > 2) {root = i; break;} labels[root] = 1000; for(int i=0; i<g[root].size(); i++) { int child = g[root][i]; genLabels(i+1, child, labels, g); } } else if (subtask1(g)) { int node = 0; for (int i=0; i<n; i++) if(g[i].size()==1) node = i; int prev = node; for (int i=0; i<n; i++) { labels[node] = i; for(int next: g[node]) if(labels[next]== -1) {node = next;} } } // else if (subtask4(n,k)) { // } else if (subtask2(u,v)) { for(int i=0; i<n; i++) labels[i] = i; } // print(labels); return labels; } bool ancestor(int s, int t) { if (s==0) return true; while (t) { if (s==t) return true; t = (t-1)>>1; } return false; } int find_next_station(int s, int t, std::vector<int> c) { int subtask = 0; if (s>1'000'000 || t>1'000'000) subtask=4; else if (s>1000 || t>1000) subtask=3; else { if (s==0) { if (c.size()==1) subtask = 1; else if (c.size()==2) subtask = 2; } else if (s==1) { if (t==0) return 0; else { subtask = 2; for(int elem: c) if(elem == 2) {subtask=1; break;} } } else { subtask = 1; for(int i=0; i<c.size(); i++) if(!(c[i]==s-1 || c[i]==s+1)) {subtask = 2; break;} } } if (subtask==1) { for(int next: c) if (s<t && s<next) return next; else if (s>t && s>next) return next; } else if (subtask==2) { if (ancestor(2*s+1,t)) return 2*s+1; else if (ancestor(2*s+2,t)) return 2*s+2; else return (s-1)/2; } else if (subtask==3) { if (s==1000) return (t/1000)*1000+1; if (s/1000 == t/1000) { if (s<t) return s+1; else return s-1; } else { if (s%1000==1) return 1000; else return s-1; } } }

컴파일 시 표준 에러 (stderr) 메시지

stations.cpp: In function 'bool subtask1(std::vector<std::vector<int> >&)':
stations.cpp:19:9: error: 'k' was not declared in this scope
   19 |     if (k==1'000) return true;
      |         ^
stations.cpp:16:9: warning: unused variable 'n' [-Wunused-variable]
   16 |     int n = g.size();
      |         ^
stations.cpp: In function 'bool subtask2(std::vector<int>&, std::vector<int>&)':
stations.cpp:25:25: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   25 |         if (!(u[i]==i+1 && v[i]==i/2 || u[i]==i/2 && v[i]==i+1))
stations.cpp:27:9: error: 'k' was not declared in this scope
   27 |     if (k==1'000) return true;
      |         ^
stations.cpp: In function 'bool subtask3(std::vector<std::vector<int> >&)':
stations.cpp:34:19: error: 'k' was not declared in this scope
   34 |     if (cnt==1 && k==1'000'000) return true;
      |                   ^
stations.cpp:31:9: warning: unused variable 'n' [-Wunused-variable]
   31 |     int n=g.size(), cnt=0;
      |         ^
stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:60:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   60 |         for(int i=0; i<n; i++)
      |         ^~~
stations.cpp:62:13: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   62 |             labels[root] = 1000;
      |             ^~~~~~
stations.cpp:63:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   63 |         for(int i=0; i<g[root].size(); i++) {
      |                      ~^~~~~~~~~~~~~~~
stations.cpp:72:13: warning: unused variable 'prev' [-Wunused-variable]
   72 |         int prev = node;
      |             ^~~~
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:119:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  119 |             for(int i=0; i<c.size(); i++)
      |                          ~^~~~~~~~~
stations.cpp: In function 'bool subtask1(std::vector<std::vector<int> >&)':
stations.cpp:21:1: warning: control reaches end of non-void function [-Wreturn-type]
   21 | }
      | ^
stations.cpp: In function 'bool subtask2(std::vector<int>&, std::vector<int>&)':
stations.cpp:29:1: warning: control reaches end of non-void function [-Wreturn-type]
   29 | }
      | ^
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:145:1: warning: control reaches end of non-void function [-Wreturn-type]
  145 | }
      | ^