Submission #1112372

#	Time	Username	Problem	Language	Result	Execution time	Memory
1112372		modwwe	Rice Hub (IOI11_ricehub)	C++17	Compilation error	0 ms	0 KiB

This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.

ricehub

#pragma GCC optimize("Ofast,unroll-loops") //#pragma GCC optimize("conserve-stack") #include<bits/stdc++.h> //#define int long long #define ll long long #define down cout<<'\n'; #define debug cout<<" cucuucucuuu",down #define NHP ios_base::sync_with_stdio(0);cout.tie(0);cin.tie(0); #define modwwe int t;cin>>t; while(t--) #define bit(i,j) (i>>j&1) #define sobit(a) __builtin_popcountll(a) #define task "test" #define fin(x) freopen(x".inp","r",stdin) #define fou(x) freopen(x".ans","w",stdout) #define pb push_back #define mask(k) (1<<k) #define mp make_pair #define checktime cerr << (double)clock() / CLOCKS_PER_SEC * 1000 << " ms"; using namespace std; #define getchar_unlocked getchar inline int scan() { char c = getchar_unlocked(); int x = 0; while (c < '0' || c > '9') { c = getchar_unlocked(); } while (c >= '0' && c <= '9') { x = (x << 1) + (x << 3) + c - '0'; c = getchar_unlocked(); } return x; } void phongbeo(); const int inf = 1e18; const int mod2 = 1e9 + 7; const int mod1 = 998244353; const ll base=67; int add(int x,int y) { if(x+y>=mod2) x-=mod2; if(x+y<0)x+=mod2; return x+y; } struct icd { long double a; int b; }; struct ib { int a; int b; }; struct ic { int a, b, c; }; struct id { int a, b, c, d; }; struct ie { int a, b, c, d, e; }; int n, m, s1, s2, s4, s3, sf, k, s5, s6, mx, s7, s8, s9, mx2, res, dem2 = 0, dem = 0, s33, dem3, dem4, mid, l2, r2, center; int i, s10, s12,k1,k2,k3,s11,t,lim,w,l,r,p ; int kk; int el = 19; main() { if(fopen(task".inp","r")) { fin(task); fou(task); } NHP /// cin>>s1; // modwwe phongbeo(); // checktime } struct seg { vector<ib>left,right; int gcd=0; ll val=0; void res(int x,int y) { t[node].left.clear(); t[node].right.clear(); t[node].left.pb({x,y}); t[node].right.pb({x,y}); t[node].val=x; t[node].gcd=x; } }; struct fefefe { void build(int node,int l,int r) { sz[node]= {r-l+1,r}; if(l==r) { t[node].res(a[l]); return; } int mid=l+r>>1; build(node<<1,l,mid); build(node<<1|1,mid+1,r); t[node]=mer(t[node<<1],t[node<<1|1]); } int maxcost(vector<ib> a,vector<ib> b) { int vcabiu=0; for(auto x:b) { int kiki=__gcd(x,a[0].a); int l=0; int r=a.size()-1; while(true) { while(l<=r) { int mid=l+r>>1; if(a[mid].a%kiki==0)r=mid-1; else l=mid+1; } vcabiu=max(vcabiu,(x.b-a[r+1].b+1)*kiki); if(r==-1) break; kiki=__gcd(kiki,a[r].a); if(kiki==1) break; } } return vcabiu; } vector<ib> setupleft_andright(vector<ib> a,vector<ib> b,int cd) { for(auto x:b) if(__gcd(x.a,cd)!=a.back()) a.pb({__gcd(x.a,cd),x.b}); else a.back().b=x.b; return a; } seg mer(seg a,seg b) { seg c; c.val=maxcost(a.left,b.right); c.val=max({c.val,b.val,a.val}); c.gcd=(a.gcd,b.gcd); c.right=(setupleft_andright(a.right,b.right,a.gcd)); c.left(setupleft_andright(b.left,a.left,b.gcd)); return c; } void apply(int node,int y,int z,int cc) { t[node].left.clear(); t[node].right.clear(); int l=sz[node].a; int r=sz[node].b; t[node].gcd=cc; t[node].left.pb({cc,l}); t[node].right.pb({cc,r}); if(l==r) { t[node].gcd==y+r*z; t[node].left[0].a=y+r*z; t[node].right[0].a=y+r*z; } t[node].val=max(t[node].gcd*(r-l+1),y+r*z); t2[node]= {y,z,cc}; } void ff(int x) { for(int i=x*2; i<=x*2+1; i++) apply(i,t2[x].a,t2[x].b,t2[x].c); t2[x]= {0,0,0}; } void upd(int node,int l,int r,int l1,int r1,int y,int z,int cc) { if(l>r1||r<l1) return; if(l>=l1&&r<=r1) { apply(node,y,z,cc); return; } if(t2[node].b!=0)ff(node); int mid=l+r>>1; upd(node<<1,l,mid,l1,r1,x,y,z,cc); upd(node<<1|1,mid+1,r,l1,r1,x,y,z,cc); t[node]=mer(t[node<<1],t[node<<1|1]); } } st; void phongbeo() { cin>>n>>m; for(int i=1; i<=n; i++) cin>>a[i]; st.build(1,1,n); }

Compilation message (stderr)

ricehub.cpp:38:17: warning: overflow in conversion from 'double' to 'int' changes value from '1.0e+18' to '2147483647' [-Woverflow]
   38 | const int inf = 1e18;
      |                 ^~~~
ricehub.cpp:75:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   75 | main()
      | ^~~~
ricehub.cpp: In member function 'void seg::res(int, int)':
ricehub.cpp:95:11: error: 'node' was not declared in this scope
   95 |         t[node].left.clear();
      |           ^~~~
ricehub.cpp: In member function 'void fefefe::build(int, int, int)':
ricehub.cpp:107:9: error: 'sz' was not declared in this scope; did you mean 's9'?
  107 |         sz[node]= {r-l+1,r};
      |         ^~
      |         s9
ricehub.cpp:110:14: error: invalid types 'int[int]' for array subscript
  110 |             t[node].res(a[l]);
      |              ^
ricehub.cpp:110:25: error: 'a' was not declared in this scope
  110 |             t[node].res(a[l]);
      |                         ^
ricehub.cpp:113:18: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  113 |         int mid=l+r>>1;
      |                 ~^~
ricehub.cpp:116:10: error: invalid types 'int[int]' for array subscript
  116 |         t[node]=mer(t[node<<1],t[node<<1|1]);
      |          ^
ricehub.cpp:116:22: error: invalid types 'int[int]' for array subscript
  116 |         t[node]=mer(t[node<<1],t[node<<1|1]);
      |                      ^
ricehub.cpp:116:33: error: invalid types 'int[int]' for array subscript
  116 |         t[node]=mer(t[node<<1],t[node<<1|1]);
      |                                 ^
ricehub.cpp: In member function 'int fefefe::maxcost(std::vector<ib>, std::vector<ib>)':
ricehub.cpp:123:36: error: no matching function for call to '__gcd(ib&, int&)'
  123 |             int kiki=__gcd(x,a[0].a);
      |                                    ^
In file included from /usr/include/c++/10/algorithm:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from ricehub.cpp:3:
/usr/include/c++/10/bits/stl_algo.h:1219:5: note: candidate: 'template<class _EuclideanRingElement> _EuclideanRingElement std::__gcd(_EuclideanRingElement, _EuclideanRingElement)'
 1219 |     __gcd(_EuclideanRingElement __m, _EuclideanRingElement __n)
      |     ^~~~~
/usr/include/c++/10/bits/stl_algo.h:1219:5: note:   template argument deduction/substitution failed:
ricehub.cpp:123:36: note:   deduced conflicting types for parameter '_EuclideanRingElement' ('ib' and 'int')
  123 |             int kiki=__gcd(x,a[0].a);
      |                                    ^
ricehub.cpp:130:30: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  130 |                     int mid=l+r>>1;
      |                             ~^~
ricehub.cpp: In member function 'std::vector<ib> fefefe::setupleft_andright(std::vector<ib>, std::vector<ib>, int)':
ricehub.cpp:145:29: error: no match for 'operator!=' (operand types are 'int' and '__gnu_cxx::__alloc_traits<std::allocator<ib>, ib>::value_type' {aka 'ib'})
  145 |             if(__gcd(x.a,cd)!=a.back())
      |                ~~~~~~~~~~~~~^~~~~~~~~~
      |                     |               |
      |                     int             __gnu_cxx::__alloc_traits<std::allocator<ib>, ib>::value_type {aka ib}
In file included from /usr/include/c++/10/regex:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:110,
                 from ricehub.cpp:3:
/usr/include/c++/10/bits/regex.h:1064:5: note: candidate: 'template<class _BiIter> bool std::__cxx11::operator!=(const std::__cxx11::sub_match<_BiIter>&, const std::__cxx11::sub_match<_BiIter>&)'
 1064 |     operator!=(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/10/bits/regex.h:1064:5: note:   template argument deduction/substitution failed:
ricehub.cpp:145:38: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'int'
  145 |             if(__gcd(x.a,cd)!=a.back())
      |                                      ^
In file included from /usr/include/c++/10/regex:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:110,
                 from ricehub.cpp:3:
/usr/include/c++/10/bits/regex.h:1144:5: note: candidate: 'template<class _Bi_iter, class _Ch_traits, class _Ch_alloc> bool std::__cxx11::operator!=(std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>&, const std::__cxx11::sub_match<_BiIter>&)'
 1144 |     operator!=(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/10/bits/regex.h:1144:5: note:   template argument deduction/substitution failed:
ricehub.cpp:145:38: note:   mismatched types 'std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>' and 'int'
  145 |             if(__gcd(x.a,cd)!=a.back())
      |                                      ^
In file included from /usr/include/c++/10/regex:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:110,
                 from ricehub.cpp:3:
/usr/include/c++/10/bits/regex.h:1237:5: note: candidate: 'template<class _Bi_iter, class _Ch_traits, class _Ch_alloc> bool std::__cxx11::operator!=(const std::__cxx11::sub_match<_BiIter>&, std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>&)'
 1237 |     operator!=(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/10/bits/regex.h:1237:5: note:   template argument deduction/substitution failed:
ricehub.cpp:145:38: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'int'
  145 |             if(__gcd(x.a,cd)!=a.back())
      |                                      ^
In file included from /usr/include/c++/10/regex:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:110,
                 from ricehub.cpp:3:
/usr/include/c++/10/bits/regex.h:1311:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator!=(const typename std::iterator_traits<_Iter>::value_type*, const std::__cxx11::sub_match<_BiIter>&)'
 1311 |     operator!=(typename iterator_traits<_Bi_iter>::value_type const* __lhs,
      |     ^~~~~~~~
/usr/include/c++/10/bits/regex.h:1311:5: note:   template argument deduction/substitution failed:
ricehub.cpp:145:38: note:   '__gnu_cxx::__alloc_traits<std::allocator<ib>, ib>::value_type' {aka 'ib'} is not derived from 'const std::__cxx11::sub_match<_BiIter>'
  145 |             if(__gcd(x.a,cd)!=a.back())
      |                                      ^
In file included from /usr/include/c++/10/regex:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:110,
                 from ricehub.cpp:3:
/usr/include/c++/10/bits/regex.h:1405:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator!=(const std::__cxx11::sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type*)'
 1405 |     operator!=(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/10/bits/regex.h:1405:5: note:   template argument deduction/substitution failed:
ricehub.cpp:145:38: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'int'
  145 |             if(__gcd(x.a,cd)!=a.back())
      |                                      ^
In file included from /usr/include/c++/10/regex:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:110,
                 from ricehub.cpp:3:
/usr/include/c++/10/bits/regex.h:1479:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator!=(const typename std::iterator_traits<_Iter>::value_type&, const std::__cxx11::sub_match<_BiIter>&)'
 1479 |     operator!=(typename iterator_traits<_Bi_iter>::value_type const& __lhs,
      |     ^~~~~~~~
/usr/include/c++/10/bits/regex.h:1479:5: note:   template argument deduction/substitution failed:
ricehub.cpp:145:38: note:   '__gnu_cxx::__alloc_traits<std::allocator<ib>, ib>::value_type' {aka 'ib'} is not derived from 'const std::__cxx11::sub_match<_BiIter>'
  145 |             if(__gcd(x.a,cd)!=a.back())
      |                                      ^
In file included from /usr/include/c++/10/regex:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:110,
                 from ricehub.cpp:3:
/usr/include/c++/10/bits/regex.h:1579:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator!=(const std::__cxx11::sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type&)'
 1579 |     operator!=(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/10/bits/regex.h:1579:5: note:   template argument deduction/substitution failed:
ricehub.cpp:145:38: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'int'
  145 |             if(__gcd(x.a,cd)!=a.back())
      |                                      ^
In file included from /usr/include/c++/10/regex:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:110,
                 from ricehub.cpp:3:
/usr/include/c++/10/bits/regex.h:2126:5: note: candidate: 'template<class _Bi_iter, class _Alloc> bool std::__cxx11::operator!=(const std::__cxx11::match_results<_BiIter, _Alloc>&, const std::__cxx11::match_results<_BiIter, _Alloc>&)'
 2126 |     operator!=(const match_results<_Bi_iter, _Alloc>& __m1,
      |     ^~~~~~~~
/usr/include/c++/10/bits/regex.h:2126:5: note:   template argument deduction/substitution failed:
ricehub.cpp:145:38: note:   mismatched types 'const std::__cxx11::match_results<_BiIter, _Alloc>' and 'int'
  145 |             if(__gcd(x.a,cd)!=a.back())
      |                                      ^
In file included from /usr/include/c++/10/bits/stl_algobase.h:64,
                 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 ricehub.cpp:3:
/usr/include/c++/10/bits/stl_pair.h:496:5: note: candidate: 'template<class _T1, class _T2> constexpr bool std::operator!=(const std::pair<_T1, _T2>&, const std::pair<_T1, _T2>&)'
  496 |     operator!=(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
      |     ^~~~~~~~
/usr/include/c++/10/bits/stl_pair.h:496:5: note:   template argument deduction/substitution failed:
ricehub.cpp:145:38: note:   mismatched types 'const std::pair<_T1, _T2>' and 'int'
  145 |             if(__gcd(x.a,cd)!=a.back())
      |                                      ^
In file included from /usr/include/c++/10/bits/stl_algobase.h:67,
                 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 ricehub.cpp:3:
/usr/include/c++/10/bits/stl_iterator.h:372:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator!=(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_Iterator>&)'
  372 |     operator!=(const reverse_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/10/bits/stl_iterator.h:372:5: note:   template argument deduction/substitution failed:
ricehub.cpp:145:38: note:   mismatched types 'const std::reverse_iterator<_Iterator>' and 'int'
  145 |             if(__gcd(x.a,cd)!=a.back())
      |                                      ^
In file included from /usr/include/c++/10/bits/stl_algobase.h:67,
                 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 ricehub.cpp:3:
/usr/include/c++/10/bits/stl_iterator.h:410:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator!=(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_IteratorR>&)'
  410 |     operator!=(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/10/bits/stl_iterator.h:410:5: note:   template argument deduction/substitution failed:
ricehub.cpp:145:38: note:   mismatched types 'const std::reverse_iterator<_Iterator>' and 'int'
  145 |             if(__gcd(x.a,cd)!=a.back())
      |                                      ^
In file included from /usr/include/c++/10/bits/stl_algobase.h:67,
                 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 ricehub.cpp:3:
/usr/include/c++/10/bits/stl_iterator.h:1444:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator!=(const std::move_iterator<_IteratorL>&, const std::move_iterator<_IteratorR>&)'
 1444 |     operator!=(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/10/bits/stl_iterator.h:1444:5: note:   template argument deduction/substitution failed:
ricehub.cpp:145:38: note:   mismatched types 'const std::move_iterator<_IteratorL>' and 'int'
  145 |             if(__gcd(x.a,cd)!=a.back())
      |                                      ^
In file included from /usr/include/c++/10/bits/stl_algobase.h:67,
                 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 ricehub.cpp:3:
/usr/include/c++/10/bits/stl_iterator.h:1501:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator!=(const std::move_iterator<_IteratorL>&, const std::move_iterator<_IteratorL>&)'
 1501 |     operator!=(const move_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/10/bits/stl_iterator.h:1501:5: note:   template argument deduction/substitution failed:
ricehub.cpp:145:38: note:   mismatched types 'const std::move_iterator<_IteratorL>' and 'int'
  145 |             if(__gcd(x.a,cd)!=a.back())
      |                                      ^
In file included from /usr/include/c++/10/iosfwd:40,
                 from /usr/include/c++/10/ios:38,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from ricehub.cpp:3:
/usr/include/c++/10/bits/postypes.h:227:5: note: candidate: 'template<class _StateT> bool std::operator!=(const std::fpos<_StateT>&, const std::fpos<_StateT>&)'
  227 |     operator!=(const fpos<_StateT>& __lhs, const fpos<_StateT>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/10/bits/postypes.h:227:5: note:   template argument deduction/substitution failed:
ricehub.cpp:145:38: note:   mismatched types 'const std::fpos<_StateT>' and 'int'
  145 |             if(__gcd(x.a,cd)!=a.back())
      |                                      ^
In file included from /usr/include/c++/10/string:41,
                 from /usr/include/c++/10/bits/locale_classes.h:40,
                 from /usr/include/c++/10/bits/ios_base.h:41,
                 from /usr/include/c++/10/ios:42,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from ricehub.cpp:3:
/usr/include/c++/10/bits/allocator.h:213:5: note: candidate: 'template<class _T1, class _T2> bool std::operator!=(const std::allocator<_CharT>&, const std::allocator<_T2>&)'
  213 |     operator!=(const allocator<_T1>&, const allocator<_T2>&)
      |     ^~~~~~~~
/usr/include/c++/10/bits/allocator.h:213:5: note:   template argument deduction/substitution failed:
ricehub.cpp:145:38: note:   mismatched types 'const std::allocator<_CharT>' and 'int'
  145 |             if(__gcd(x.a,cd)!=a.back())
      |                                      ^
In file included from /usr/include/c++/10/bits/basic_string.h:48,
                 from /usr/include/c++/10/string:55,
                 from /usr/include/c++/10/bits/locale_classes.h:40,
                 from /usr/include/c++/10/bits/ios_base.h:41,
                 from /usr/include/c++/10/ios:42,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from ricehub.cpp:3:
/usr/include/c++/10/string_view:525:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator!=(std::basic_string_view<_CharT, _Traits>, std::basic_string_view<_CharT, _Traits>)'
  525 |     operator!=(basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/10/string_view:525:5: note:   template argument deduction/substitution failed:
ricehub.cpp:145:38: note:   mismatched types 'std::basic_string_view<_CharT, _Traits>' and 'int'
  145 |             if(__gcd(x.a,cd)!=a.back())
      |                                      ^
In file included from /usr/include/c++/10/bits/basic_string.h:48,
                 from /usr/include/c++/10/string:55,
                 from /usr/include/c++/10/bits/locale_classes.h:40,
                 from /usr/include/c++/10/bits/ios_base.h:41,
                 from /usr/include/c++/10/ios:42,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from ricehub.cpp:3:
/usr/include/c++/10/string_view:531:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator!=(std::basic_string_view<_CharT, _Traits>, std::__type_identity_t<std::basic_string_view<_CharT, _Traits> >)'
  531 |     operator!=(basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/10/string_view:531:5: note:   template argument deduction/substitution failed:
ricehub.cpp:145:38: note:   mismatched typ