Submission #653280

#	Time	Username	Problem	Language	Result	Execution time	Memory
653280		mychecksedad	Stations (IOI20_stations)	C++17	Compilation error	0 ms	0 KiB

stations

#include <bits/stdc++.h>
using namespace std;
#define pb push_back


vector<int> label(int n, int k, vector<int> u, vector<int> v){
	int timer = 0, tin[n], tout[n];
	vector<vector<int>> g(n);
	for(int i = 0; i < n-1; ++i) g[u[i]].pb(v[i]), g[v[i]].pb(u[i]);
	function<void(int, int)> dfs = [&](int v, int p, int d){
		if(d) tin[v] = timer++;
		for(int u: g[v]){
			if(u != p) dfs(u, v, d^1);
		}
		if(!d) tout[v] = timer++;
	};
	dfs(0, 0, 1);
	vector<int> l;
	for(int i = 0; i < n; ++i) l.pb(dep[i] % 2 == 1 ? tin[i] : tout[i]);

	return l;
}
int find_next_station(int s, int t, vector<int> c){
	for(int p: c){
		if(p==t) return t;
	}
	if(s == 0){
		for(int i = 0; i < c.size(); ++i){
			if(c[i] >= t){
				return c[i];
			}
		}
	}
	if(s <= c[0]){
		int par = c.back();	
		if(t <= s || par <= t)
			return par;
		for(int i = 0; i < c.size() - 1; ++i){
			if(t <= c[i]){
				return c[i];
			}
		}
	}
	int par = c[0];
	if(t >= s || t <= par){
		return par;
	}
	for(int i = c.size() - 1; i >= 1; --i){
		if(t >= c[i]){
			return c[i];
		}
	}
	return -1;
}

Compilation message (stderr)

stations.cpp: In lambda function:
stations.cpp:13:28: error: no match for call to '(std::function<void(int, int)>) (int&, int&, int)'
   13 |    if(u != p) dfs(u, v, d^1);
      |                            ^
In file included from /usr/include/c++/10/functional:59,
                 from /usr/include/c++/10/pstl/glue_algorithm_defs.h:13,
                 from /usr/include/c++/10/algorithm:74,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from stations.cpp:1:
/usr/include/c++/10/bits/std_function.h:617:5: note: candidate: '_Res std::function<_Res(_ArgTypes ...)>::operator()(_ArgTypes ...) const [with _Res = void; _ArgTypes = {int, int}]'
  617 |     function<_Res(_ArgTypes...)>::
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/10/bits/std_function.h:617:5: note:   candidate expects 2 arguments, 3 provided
stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:16:2: error: conversion from 'label(int, int, std::vector<int>, std::vector<int>)::<lambda(int, int, int)>' to non-scalar type 'std::function<void(int, int)>' requested
   16 |  };
      |  ^
stations.cpp:17:13: error: no match for call to '(std::function<void(int, int)>) (int, int, int)'
   17 |  dfs(0, 0, 1);
      |             ^
In file included from /usr/include/c++/10/functional:59,
                 from /usr/include/c++/10/pstl/glue_algorithm_defs.h:13,
                 from /usr/include/c++/10/algorithm:74,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from stations.cpp:1:
/usr/include/c++/10/bits/std_function.h:617:5: note: candidate: '_Res std::function<_Res(_ArgTypes ...)>::operator()(_ArgTypes ...) const [with _Res = void; _ArgTypes = {int, int}]'
  617 |     function<_Res(_ArgTypes...)>::
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/10/bits/std_function.h:617:5: note:   candidate expects 2 arguments, 3 provided
stations.cpp:19:34: error: 'dep' was not declared in this scope
   19 |  for(int i = 0; i < n; ++i) l.pb(dep[i] % 2 == 1 ? tin[i] : tout[i]);
      |                                  ^~~
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:28:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |   for(int i = 0; i < c.size(); ++i){
      |                  ~~^~~~~~~~~~
stations.cpp:38:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |   for(int i = 0; i < c.size() - 1; ++i){
      |                  ~~^~~~~~~~~~~~~~