Submission #1123629

#	Time	Username	Problem	Language	Result	Execution time	Memory
1123629		marinaluca	Traffic (IOI10_traffic)	C++20	Compilation error	0 ms	0 KiB

traffic

#include <bits/stdc++.h>
#include "traffic.h"

#pragma GCC optimize ("O3")
#pragma GCC optimize ("fast-math")
#pragma GCC optimize ("unroll-loops")

using namespace std;
//#define int long long
#define ll long long
#define all (x) begin(x), end(x)
#define xx first
#define yy second

using pii = pair <int, int>;
using tii = tuple <int, int, int>;

constexpr int NMAX = (int) 1e6;

vector <int> ans[NMAX + 1];
ll lazy[NMAX + 1];
ll cp[NMAX + 1];
ll s, maxi;
int rez;

inline void dfs (int nod, int parent)
{
    ll maxi = 0;
    for (auto elem : ans[nod])
    {
       if (elem != parent)
       {
           dfs (elem, nod);
           lazy[nod] += lazy[elem];
           maxi = max (maxi, lazy[elem]);
       }
    }
    cp[nod] = maxi;
}
int LocateCentre(int n,int p[],int s[],int d[])
{
    maxi = INT_MIN;
    rez = -1;
    for (int i = 0; i < n; ++ i)
    {
        lazy[i] = p[i];
        s += lazy[i];
    }
    for (int i = 0; i < n - 1; ++ i)
    {
        ans[s[i]].push_back(d[i]);
        ans[d[i]].push_back(s[i]);
    }
    dfs (0, -1);
    for (int i = 0; i < n; ++ i)
    {
        cp[i] = max (cp[i], s - lazy[i]);
        if (cp[i] < mini)
        {
            mini = cp[i];
            rez = i;
        }
    }
    return rez;
    
}

Compilation message (stderr)

traffic.cpp: In function 'int LocateCentre(int, int*, int*, int*)':
traffic.cpp:57:21: error: no matching function for call to 'max(long long int&, int*)'
   57 |         cp[i] = max (cp[i], s - lazy[i]);
      |                 ~~~~^~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/11/bits/specfun.h:45,
                 from /usr/include/c++/11/cmath:1935,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:41,
                 from traffic.cpp:1:
/usr/include/c++/11/bits/stl_algobase.h:254:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  254 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/11/bits/stl_algobase.h:254:5: note:   template argument deduction/substitution failed:
traffic.cpp:57:21: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int*')
   57 |         cp[i] = max (cp[i], s - lazy[i]);
      |                 ~~~~^~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/11/bits/specfun.h:45,
                 from /usr/include/c++/11/cmath:1935,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:41,
                 from traffic.cpp:1:
/usr/include/c++/11/bits/stl_algobase.h:300:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  300 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/11/bits/stl_algobase.h:300:5: note:   template argument deduction/substitution failed:
traffic.cpp:57:21: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int*')
   57 |         cp[i] = max (cp[i], s - lazy[i]);
      |                 ~~~~^~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/11/string:52,
                 from /usr/include/c++/11/bits/locale_classes.h:40,
                 from /usr/include/c++/11/bits/ios_base.h:41,
                 from /usr/include/c++/11/ios:42,
                 from /usr/include/c++/11/istream:38,
                 from /usr/include/c++/11/sstream:38,
                 from /usr/include/c++/11/complex:45,
                 from /usr/include/c++/11/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54,
                 from traffic.cpp:1:
/usr/include/c++/11/bits/stl_algo.h:3461:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(std::initializer_list<_Tp>)'
 3461 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/11/bits/stl_algo.h:3461:5: note:   template argument deduction/substitution failed:
traffic.cpp:57:21: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   57 |         cp[i] = max (cp[i], s - lazy[i]);
      |                 ~~~~^~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/11/string:52,
                 from /usr/include/c++/11/bits/locale_classes.h:40,
                 from /usr/include/c++/11/bits/ios_base.h:41,
                 from /usr/include/c++/11/ios:42,
                 from /usr/include/c++/11/istream:38,
                 from /usr/include/c++/11/sstream:38,
                 from /usr/include/c++/11/complex:45,
                 from /usr/include/c++/11/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54,
                 from traffic.cpp:1:
/usr/include/c++/11/bits/stl_algo.h:3467:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(std::initializer_list<_Tp>, _Compare)'
 3467 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/11/bits/stl_algo.h:3467:5: note:   template argument deduction/substitution failed:
traffic.cpp:57:21: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   57 |         cp[i] = max (cp[i], s - lazy[i]);
      |                 ~~~~^~~~~~~~~~~~~~~~~~~~
traffic.cpp:58:21: error: 'mini' was not declared in this scope
   58 |         if (cp[i] < mini)
      |                     ^~~~