Submission #704190

#	Time	Username	Problem	Language	Result	Execution time	Memory
704190		boyliguanhan	Senior Postmen (BOI14_postmen)	C++17	Compilation error	0 ms	0 KiB

postmen

#include<bits/stdc++.h>
#pragma GCC optimize(2)
using namespace std;
vector<pair<int, int>> adj[500100];
bitset<500100> removed;
int deg[500100];
stack<int> sol;
int read(){
    int res = 0, c = getchar_unlocked();
    while(c < '0' || c > '9')
        c = getchar_unlocked();
    while(isdigit(c))
        res = res*10+c - 48, c = getchar_unlocked();
    return res;
}
void reverse(){
    stack<int> temp;
    while(sol.size())
        temp.push(sol.top()), sol.pop();
    sol = temp;
}
void print(){
    stack<int> now;
    bitset<500100> appeared;
    while(sol.size()){
        if(appeared[sol.top()]){
            printf("%d", sol.top());
            while(now.top()!=sol.top())
                printf(" %d", now.top()), appeared[now.top()] = 0, now.pop();
            printf("\n");
        } else {
            appeared[sol.top()] = 1;
            now.push(sol.top());
        }
        sol.pop();
    }
}
void dfs(int n){
    for(auto i: adj[n])
        if(!removed[i.second])
            removed[i.second] = 1, dfs(i.first);
    sol.push_back(n);
}
int main(){
    int n = read(), m = read();
    for(int i = 0; i < m; i++) {
        int a = read(), b = read();
        adj[a].insert({b, i});
        adj[b].insert({a, i});
        deg[a]++;
        deg[b]++;
    }
    dfs(1);
    reverse();
    print();
    return 0;
}

Compilation message (stderr)

postmen.cpp: In function 'void dfs(int)':
postmen.cpp:42:9: error: 'class std::stack<int>' has no member named 'push_back'
   42 |     sol.push_back(n);
      |         ^~~~~~~~~
postmen.cpp: In function 'int main()':
postmen.cpp:48:29: error: no matching function for call to 'std::vector<std::pair<int, int> >::insert(<brace-enclosed initializer list>)'
   48 |         adj[a].insert({b, i});
      |                             ^
In file included from /usr/include/c++/10/vector:72,
                 from /usr/include/c++/10/functional:62,
                 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 postmen.cpp:1:
/usr/include/c++/10/bits/vector.tcc:130:5: note: candidate: 'std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::insert(std::vector<_Tp, _Alloc>::const_iterator, const value_type&) [with _Tp = std::pair<int, int>; _Alloc = std::allocator<std::pair<int, int> >; std::vector<_Tp, _Alloc>::iterator = std::vector<std::pair<int, int> >::iterator; std::vector<_Tp, _Alloc>::const_iterator = std::vector<std::pair<int, int> >::const_iterator; std::vector<_Tp, _Alloc>::value_type = std::pair<int, int>]'
  130 |     vector<_Tp, _Alloc>::
      |     ^~~~~~~~~~~~~~~~~~~
/usr/include/c++/10/bits/vector.tcc:130:5: note:   candidate expects 2 arguments, 1 provided
In file included from /usr/include/c++/10/vector:67,
                 from /usr/include/c++/10/functional:62,
                 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 postmen.cpp:1:
/usr/include/c++/10/bits/stl_vector.h:1293:7: note: candidate: 'std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::insert(std::vector<_Tp, _Alloc>::const_iterator, std::vector<_Tp, _Alloc>::value_type&&) [with _Tp = std::pair<int, int>; _Alloc = std::allocator<std::pair<int, int> >; std::vector<_Tp, _Alloc>::iterator = std::vector<std::pair<int, int> >::iterator; std::vector<_Tp, _Alloc>::const_iterator = std::vector<std::pair<int, int> >::const_iterator; std::vector<_Tp, _Alloc>::value_type = std::pair<int, int>]'
 1293 |       insert(const_iterator __position, value_type&& __x)
      |       ^~~~~~
/usr/include/c++/10/bits/stl_vector.h:1293:7: note:   candidate expects 2 arguments, 1 provided
/usr/include/c++/10/bits/stl_vector.h:1310:7: note: candidate: 'std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::insert(std::vector<_Tp, _Alloc>::const_iterator, std::initializer_list<_Tp>) [with _Tp = std::pair<int, int>; _Alloc = std::allocator<std::pair<int, int> >; std::vector<_Tp, _Alloc>::iterator = std::vector<std::pair<int, int> >::iterator; std::vector<_Tp, _Alloc>::const_iterator = std::vector<std::pair<int, int> >::const_iterator]'
 1310 |       insert(const_iterator __position, initializer_list<value_type> __l)
      |       ^~~~~~
/usr/include/c++/10/bits/stl_vector.h:1310:7: note:   candidate expects 2 arguments, 1 provided
/usr/include/c++/10/bits/stl_vector.h:1335:7: note: candidate: 'std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::insert(std::vector<_Tp, _Alloc>::const_iterator, std::vector<_Tp, _Alloc>::size_type, const value_type&) [with _Tp = std::pair<int, int>; _Alloc = std::allocator<std::pair<int, int> >; std::vector<_Tp, _Alloc>::iterator = std::vector<std::pair<int, int> >::iterator; std::vector<_Tp, _Alloc>::const_iterator = std::vector<std::pair<int, int> >::const_iterator; std::vector<_Tp, _Alloc>::size_type = long unsigned int; std::vector<_Tp, _Alloc>::value_type = std::pair<int, int>]'
 1335 |       insert(const_iterator __position, size_type __n, const value_type& __x)
      |       ^~~~~~
/usr/include/c++/10/bits/stl_vector.h:1335:7: note:   candidate expects 3 arguments, 1 provided
/usr/include/c++/10/bits/stl_vector.h:1379:2: note: candidate: 'template<class _InputIterator, class> std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::insert(std::vector<_Tp, _Alloc>::const_iterator, _InputIterator, _InputIterator) [with _InputIterator = _InputIterator; <template-parameter-2-2> = <template-parameter-1-2>; _Tp = std::pair<int, int>; _Alloc = std::allocator<std::pair<int, int> >]'
 1379 |  insert(const_iterator __position, _InputIterator __first,
      |  ^~~~~~
/usr/include/c++/10/bits/stl_vector.h:1379:2: note:   template argument deduction/substitution failed:
postmen.cpp:48:29: note:   candidate expects 3 arguments, 1 provided
   48 |         adj[a].insert({b, i});
      |                             ^
postmen.cpp:49:29: error: no matching function for call to 'std::vector<std::pair<int, int> >::insert(<brace-enclosed initializer list>)'
   49 |         adj[b].insert({a, i});
      |                             ^
In file included from /usr/include/c++/10/vector:72,
                 from /usr/include/c++/10/functional:62,
                 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 postmen.cpp:1:
/usr/include/c++/10/bits/vector.tcc:130:5: note: candidate: 'std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::insert(std::vector<_Tp, _Alloc>::const_iterator, const value_type&) [with _Tp = std::pair<int, int>; _Alloc = std::allocator<std::pair<int, int> >; std::vector<_Tp, _Alloc>::iterator = std::vector<std::pair<int, int> >::iterator; std::vector<_Tp, _Alloc>::const_iterator = std::vector<std::pair<int, int> >::const_iterator; std::vector<_Tp, _Alloc>::value_type = std::pair<int, int>]'
  130 |     vector<_Tp, _Alloc>::
      |     ^~~~~~~~~~~~~~~~~~~
/usr/include/c++/10/bits/vector.tcc:130:5: note:   candidate expects 2 arguments, 1 provided
In file included from /usr/include/c++/10/vector:67,
                 from /usr/include/c++/10/functional:62,
                 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 postmen.cpp:1:
/usr/include/c++/10/bits/stl_vector.h:1293:7: note: candidate: 'std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::insert(std::vector<_Tp, _Alloc>::const_iterator, std::vector<_Tp, _Alloc>::value_type&&) [with _Tp = std::pair<int, int>; _Alloc = std::allocator<std::pair<int, int> >; std::vector<_Tp, _Alloc>::iterator = std::vector<std::pair<int, int> >::iterator; std::vector<_Tp, _Alloc>::const_iterator = std::vector<std::pair<int, int> >::const_iterator; std::vector<_Tp, _Alloc>::value_type = std::pair<int, int>]'
 1293 |       insert(const_iterator __position, value_type&& __x)
      |       ^~~~~~
/usr/include/c++/10/bits/stl_vector.h:1293:7: note:   candidate expects 2 arguments, 1 provided
/usr/include/c++/10/bits/stl_vector.h:1310:7: note: candidate: 'std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::insert(std::vector<_Tp, _Alloc>::const_iterator, std::initializer_list<_Tp>) [with _Tp = std::pair<int, int>; _Alloc = std::allocator<std::pair<int, int> >; std::vector<_Tp, _Alloc>::iterator = std::vector<std::pair<int, int> >::iterator; std::vector<_Tp, _Alloc>::const_iterator = std::vector<std::pair<int, int> >::const_iterator]'
 1310 |       insert(const_iterator __position, initializer_list<value_type> __l)
      |       ^~~~~~
/usr/include/c++/10/bits/stl_vector.h:1310:7: note:   candidate expects 2 arguments, 1 provided
/usr/include/c++/10/bits/stl_vector.h:1335:7: note: candidate: 'std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::insert(std::vector<_Tp, _Alloc>::const_iterator, std::vector<_Tp, _Alloc>::size_type, const value_type&) [with _Tp = std::pair<int, int>; _Alloc = std::allocator<std::pair<int, int> >; std::vector<_Tp, _Alloc>::iterator = std::vector<std::pair<int, int> >::iterator; std::vector<_Tp, _Alloc>::const_iterator = std::vector<std::pair<int, int> >::const_iterator; std::vector<_Tp, _Alloc>::size_type = long unsigned int; std::vector<_Tp, _Alloc>::value_type = std::pair<int, int>]'
 1335 |       insert(const_iterator __position, size_type __n, const value_type& __x)
      |       ^~~~~~
/usr/include/c++/10/bits/stl_vector.h:1335:7: note:   candidate expects 3 arguments, 1 provided
/usr/include/c++/10/bits/stl_vector.h:1379:2: note: candidate: 'template<class _InputIterator, class> std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::insert(std::vector<_Tp, _Alloc>::const_iterator, _InputIterator, _InputIterator) [with _InputIterator = _InputIterator; <template-parameter-2-2> = <template-parameter-1-2>; _Tp = std::pair<int, int>; _Alloc = std::allocator<std::pair<int, int> >]'
 1379 |  insert(const_iterator __position, _InputIterator __first,
      |  ^~~~~~
/usr/include/c++/10/bits/stl_vector.h:1379:2: note:   template argument deduction/substitution failed:
postmen.cpp:49:29: note:   candidate expects 3 arguments, 1 provided
   49 |         adj[b].insert({a, i});
      |                             ^
postmen.cpp:45:9: warning: unused variable 'n' [-Wunused-variable]
   45 |     int n = read(), m = read();
      |         ^