Submission #702001

#	Time	Username	Problem	Language	Result	Execution time	Memory
702001		PCTprobability	Friend (IOI14_friend)	C++17	Compilation error	0 ms	0 KiB

friend

#include <bits/stdc++.h>
#include "friend.h"
using namespace std;
using ll = long long;
#define pb push_back
vector<int> g[100000];
int dp[100000][2];
int con[100000];
void dfs(int a,int b){
  for(auto e:g[a]){
    if(e==b) continue;
    dfs(e,a);
    dp[a][0]+=max(dp[e][0],dp[e][1]);
    dp[a][1]+=dp[e][0];
  }
  dp[a][1]+=con[a];
}
int findSample(int n, int confidence[], int host[], int protocol[]){
  for(int i=0;i<n;i++) con[i]=confidence[i];
  bool allzero=true;
  for(int i=1;i<n;i++){
    if(protocol[i]!=0) allzero=false;
  }
  bool alltwo=true;
  for(int i=1;i<n;i++){
    if(protocol[i]!=2) alltwo=false;
  }
  if(alltwo){
    ll ans=0;
    for(int i=0;i<n;i++) ans=max(ans,con[i]);
    return ans;
  }
  if(allzero){
    for(int i=1;i<n;i++){
      g[host[i]].pb(i);
      g[i].pb(host[i]);
    }
    dfs(0,-1);
    return max(dp[0][0],dp[0][1]);
  }
  assert(n<=10);
  vector<vector<int>> a(n,vector<int>(n));
  for(int i=1;i<n;i++){
    if(protocol[i]==0){
      a[i][host[i]]=a[host[i]][i]=1;
    }
    if(protocol[i]==1){
      for(int j=0;j<n;j++){
        if(a[host[i]][j]){
          a[i][j]=a[j][i]=1;
        }
      }
    }
    if(protocol[i]==2){
      for(int j=0;j<n;j++){
        if(a[host[i]][j]){
          a[i][j]=a[j][i]=1;
        }
      }
      a[i][host[i]]=a[host[i]][i]=1;
    }
  }
  int ans=0;
  for(int i=0;i<(1<<n);i++){
    int sum=0,ok=1;
    for(int j=0;j<n;j++){
      if((i>>j)&1){
        sum+=confidence[j];
        for(int k=j+1;k<n;k++){
          if((i>>k)&1){
            if(a[j][k]) ok=0;
          }
        }
      }
    }
    ans=max(ans,sum*ok);
  }
  return ans;
}     

Compilation message (stderr)

friend.cpp: In function 'int findSample(int, int*, int*, int*)':
friend.cpp:30:44: error: no matching function for call to 'max(ll&, int&)'
   30 |     for(int i=0;i<n;i++) ans=max(ans,con[i]);
      |                                            ^
In file included from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from friend.cpp:1:
/usr/include/c++/10/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++/10/bits/stl_algobase.h:254:5: note:   template argument deduction/substitution failed:
friend.cpp:30:44: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   30 |     for(int i=0;i<n;i++) ans=max(ans,con[i]);
      |                                            ^
In file included from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from friend.cpp:1:
/usr/include/c++/10/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++/10/bits/stl_algobase.h:300:5: note:   template argument deduction/substitution failed:
friend.cpp:30:44: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   30 |     for(int i=0;i<n;i++) ans=max(ans,con[i]);
      |                                            ^
In file included from /usr/include/c++/10/algorithm:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from friend.cpp:1:
/usr/include/c++/10/bits/stl_algo.h:3480:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(std::initializer_list<_Tp>)'
 3480 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/10/bits/stl_algo.h:3480:5: note:   template argument deduction/substitution failed:
friend.cpp:30:44: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   30 |     for(int i=0;i<n;i++) ans=max(ans,con[i]);
      |                                            ^
In file included from /usr/include/c++/10/algorithm:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from friend.cpp:1:
/usr/include/c++/10/bits/stl_algo.h:3486:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(std::initializer_list<_Tp>, _Compare)'
 3486 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/10/bits/stl_algo.h:3486:5: note:   template argument deduction/substitution failed:
friend.cpp:30:44: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   30 |     for(int i=0;i<n;i++) ans=max(ans,con[i]);
      |                                            ^