#include<bits/stdc++.h>
#include "dreaming.h"
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
using namespace std;
typedef int ll;
typedef double db;
typedef pair<ll,ll> pl;
typedef vector<ll> vl;
typedef vector<vl> vvl;
#define po pop_back
#define pb push_back
#define mk make_pair
#define mt make_tuple
#define lw lower_bound
#define up upper_bound
#define ff first
#define ss second
#define BOOST ios_base::sync_with_stdio(); cin.tie(0); cout.tie(0);
#define MOD 1000000007
#define MAX 1e18
#define MIN -1e18
#define rep(i,a,b) for(ll i=a;i<=b;i++)
#define per(i,a,b) for(ll i=b;i>=a;i--)
#define con continue
#define freopen freopen("input.txt", "r", stdin);freopen("output.txt", "w", stdout);
#define PI 3.14159265358979323846264338327950288419716939937510582097494459230781640628
#define read(x) scanf("%lld",&x);
#define print(x) printf("%lld ",x);
#define endl '\n';
typedef tree<ll , null_type, less_equal<ll>, rb_tree_tag, tree_order_statistics_node_update> indexed_multi_set;
typedef tree<ll , null_type, less<ll>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;
// template< typename T>
// using indexed_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
int n,m,ans,mid,mn,mx,cnt,T,sum,h1,h2,e[1234567],b,c[1234567],d[1<<20],k,i,j,l,r,h,a,w,x,y,z,t;
bool used[1234567];
pair<int,int> p[1234567];
vector<pl> v[1234567];
vl vec,vv1,vv2;
// string s1,s;
// int sz[1234567],par[1234567];
int tr[5234567],par[1234567];
ll dx[4]={-1,1,0,0},dy[4]={0,0,-1,1},c1[123][123];
map<ll,ll> mp;
pair < int , int > dfs ( int chi , int p ) {
used [ chi ] = 1 ;
pl prr = { 0 , chi } ;
for( auto &u : v[ chi ] ) {
if ( u . second == p ) continue;
pp = dfs ( u . second , chi ) ;
prr = max ( prr , { pp . first + u . first , pp . second } ) ;
}
c [ chi ] = prr . first ;
par [ chi ] = p ;
return prr ;
}
int travelTime (int N, int M, int L, int A[], int B[], int T[]) {
for ( int i = 0 ; i < M ; i ++ ) {
v[ A [ i ] ] . push_back ( { T [ i ] , B [ i ] } ) ;
v[ B [ i ] ] . push_back ( { T [ i ] , A [ i ] } ) ;
}
int maxx = 0;
for ( int i = 0 ; i < N ; i ++ ) {
if ( used [ i ] != 0 ) continue ;
pl pr = dfs ( dfs ( i , -1 ) . second , -1 ) ;
x = pr . second ;
y = pr . first ;
for ( int j = x ; j >= 0 ; j = par[ j ] ) {
y = min ( y , max ( c [ j ] , pr . first - c [ j ] ) ) ;
}
vec . push_back ( y ) ;
maxx = max ( maxx , pr. first ) ;
}
sort ( vec . rbegin ( ) , vec . rend ( ) ) ;
if ( vec . size ( ) > 2 ) {
ans = L + vec [ 0 ] + vec [ 1 ] ;
for ( int i = 2 ; i < vec . size ( ) ; i ++ ) {
ans = max ( ans , L + L + vec [ 1 ] + vec [ i ] ) ;
}
}
else {
if ( vec . size ( ) == 2 ) ans = L + vec [ 0 ] + vec [ 1 ] ;
else ans = 0 ;
}
ans = max ( ans , maxx ) ;
return ans ;
}
Compilation message
dreaming.cpp: In function 'std::pair<int, int> dfs(int, int)':
dreaming.cpp:51:9: error: 'pp' was not declared in this scope; did you mean 'p'?
51 | pp = dfs ( u . second , chi ) ;
| ^~
| p
dreaming.cpp:52:68: error: no matching function for call to 'max(pl&, <brace-enclosed initializer list>)'
52 | prr = max ( prr , { pp . first + u . first , pp . second } ) ;
| ^
In file included from /usr/include/c++/9/bits/char_traits.h:39,
from /usr/include/c++/9/ios:40,
from /usr/include/c++/9/istream:38,
from /usr/include/c++/9/sstream:38,
from /usr/include/c++/9/complex:45,
from /usr/include/c++/9/ccomplex:39,
from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:54,
from dreaming.cpp:1:
/usr/include/c++/9/bits/stl_algobase.h:222:5: note: candidate: 'constexpr const _Tp& std::max(const _Tp&, const _Tp&) [with _Tp = std::pair<int, int>]'
222 | max(const _Tp& __a, const _Tp& __b)
| ^~~
/usr/include/c++/9/bits/stl_algobase.h:222:36: note: no known conversion for argument 2 from '<brace-enclosed initializer list>' to 'const std::pair<int, int>&'
222 | max(const _Tp& __a, const _Tp& __b)
| ~~~~~~~~~~~^~~
/usr/include/c++/9/bits/stl_algobase.h:268:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
268 | max(const _Tp& __a, const _Tp& __b, _Compare __comp)
| ^~~
/usr/include/c++/9/bits/stl_algobase.h:268:5: note: template argument deduction/substitution failed:
dreaming.cpp:52:68: note: candidate expects 3 arguments, 2 provided
52 | prr = max ( prr , { pp . first + u . first , pp . second } ) ;
| ^
In file included from /usr/include/c++/9/algorithm:62,
from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:65,
from dreaming.cpp:1:
/usr/include/c++/9/bits/stl_algo.h:3456:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(std::initializer_list<_Tp>)'
3456 | max(initializer_list<_Tp> __l)
| ^~~
/usr/include/c++/9/bits/stl_algo.h:3456:5: note: template argument deduction/substitution failed:
dreaming.cpp:52:68: note: 'std::pair<int, int>' is not derived from 'std::initializer_list<_Tp>'
52 | prr = max ( prr , { pp . first + u . first , pp . second } ) ;
| ^
In file included from /usr/include/c++/9/algorithm:62,
from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:65,
from dreaming.cpp:1:
/usr/include/c++/9/bits/stl_algo.h:3462:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(std::initializer_list<_Tp>, _Compare)'
3462 | max(initializer_list<_Tp> __l, _Compare __comp)
| ^~~
/usr/include/c++/9/bits/stl_algo.h:3462:5: note: template argument deduction/substitution failed:
dreaming.cpp:52:68: note: 'std::pair<int, int>' is not derived from 'std::initializer_list<_Tp>'
52 | prr = max ( prr , { pp . first + u . first , pp . second } ) ;
| ^
dreaming.cpp: In function 'int travelTime(int, int, int, int*, int*, int*)':
dreaming.cpp:78:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
78 | for ( int i = 2 ; i < vec . size ( ) ; i ++ ) {
| ~~^~~~~~~~~~~~~~~~
