| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 660915 | Trisanu_Das | Mag (COCI16_mag) | 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.
#include <bits/stdc++.h>
using namespace std;
const int maxn = 1e6 + 10;
vector<int> g[maxn], len[maxn];
int a[maxn], dp[maxn];
int n;
void add(int x, int t) {
if (len[x][0] <= t) swap(len[x][0], t);
len[x][1] = max(len[x][1], t);
}
int get(int x, int t=0) {
return (a[x] == 1) * (len[x][t] + 1);
}
int dfs(int x, int p = 0) {
len[x] = {0, 0};
for (int v : g[x]) {
if (v == p) continue;
add(x, dfs(v, x));
}
return get(x);
}
int dfs_root(int x, int p = 0) {
if (p) {
int l = (a[p] == 1) * get(p, len[p][0] == get(x));
add(x, l);
}
dp[x] = len[x][0] + len[x][1];
for (int v : g[x]) {
if (v == p) continue;
dfs_root(v, x);
}
}
int main() {
cin >> n
for (int i = 1; i <= n-1; ++i) {
int a, b;
cin >> a >> b
g[a].emplace_back(b);
g[b].emplace_back(a);
}
for (int i = 1; i <= n; ++i) cin >> a + i;;
dfs(1);
dfs_root(1);
int x = -1, y = -1;
for (int i = 1; i <= n; ++i) {
if (x == -1 or x *1ll* (dp[i] + 1) > a[i] *1ll* y) {
x = a[i];
y = dp[i] + 1;
}
}
int g = __gcd(x, y);
cout << x / g << '/' << y / g << '\n';
return 0;
}
Compilation message (stderr)
mag.cpp: In function 'int dfs_root(int, int)':
mag.cpp:36:1: warning: no return statement in function returning non-void [-Wreturn-type]
36 | }
| ^
mag.cpp: In function 'int main()':
mag.cpp:39:10: error: expected ';' before 'for'
39 | cin >> n
| ^
| ;
40 | for (int i = 1; i <= n-1; ++i) {
| ~~~
mag.cpp:40:18: error: 'i' was not declared in this scope
40 | for (int i = 1; i <= n-1; ++i) {
| ^
mag.cpp:46:35: error: no match for 'operator>>' (operand types are 'std::istream' {aka 'std::basic_istream<char>'} and 'int*')
46 | for (int i = 1; i <= n; ++i) cin >> a + i;;
| ~~~ ^~ ~~~~~
| | |
| | int*
| std::istream {aka std::basic_istream<char>}
In file included 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 mag.cpp:1:
/usr/include/c++/10/istream:168:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(bool&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]' (near match)
168 | operator>>(bool& __n)
| ^~~~~~~~
/usr/include/c++/10/istream:168:7: note: conversion of argument 1 would be ill-formed:
mag.cpp:46:40: error: cannot bind non-const lvalue reference of type 'bool&' to an rvalue of type 'bool'
46 | for (int i = 1; i <= n; ++i) cin >> a + i;;
| ~~^~~
In file included 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 mag.cpp:1:
/usr/include/c++/10/istream:172:7: note: candidate: 'std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(short int&) [with _CharT = char; _Traits = std::char_traits<char>]' (near match)
172 | operator>>(short& __n);
| ^~~~~~~~
/usr/include/c++/10/istream:172:7: note: conversion of argument 1 would be ill-formed:
mag.cpp:46:40: error: invalid conversion from 'int*' to 'short int' [-fpermissive]
46 | for (int i = 1; i <= n; ++i) cin >> a + i;;
| ~~^~~
| |
| int*
mag.cpp:46:40: error: cannot bind rvalue '(short int)(((int*)(& a)) + ((sizetype)(((long unsigned int)i) * 4)))' to 'short int&'
In file included 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 mag.cpp:1:
/usr/include/c++/10/istream:175:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(short unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]' (near match)
175 | operator>>(unsigned short& __n)
| ^~~~~~~~
/usr/include/c++/10/istream:175:7: note: conversion of argument 1 would be ill-formed:
mag.cpp:46:40: error: invalid conversion from 'int*' to 'short unsigned int' [-fpermissive]
46 | for (int i = 1; i <= n; ++i) cin >> a + i;;
| ~~^~~
| |
| int*
mag.cpp:46:40: error: cannot bind rvalue '(short unsigned int)(((int*)(& a)) + ((sizetype)(((long unsigned int)i) * 4)))' to 'short unsigned int&'
In file included 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 mag.cpp:1:
/usr/include/c++/10/istream:179:7: note: candidate: 'std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(int&) [with _CharT = char; _Traits = std::char_traits<char>]' (near match)
179 | operator>>(int& __n);
| ^~~~~~~~
/usr/include/c++/10/istream:179:7: note: conversion of argument 1 would be ill-formed:
mag.cpp:46:40: error: invalid conversion from 'int*' to 'int' [-fpermissive]
46 | for (int i = 1; i <= n; ++i) cin >> a + i;;
| ~~^~~
| |
| int*
mag.cpp:46:40: error: cannot bind rvalue '(int)(((int*)(& a)) + ((sizetype)(((long unsigned int)i) * 4)))' to 'int&'
In file included 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 mag.cpp:1:
/usr/include/c++/10/istream:182:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]' (near match)
182 | operator>>(unsigned int& __n)
| ^~~~~~~~
/usr/include/c++/10/istream:182:7: note: conversion of argument 1 would be ill-formed:
mag.cpp:46:40: error: invalid conversion from 'int*' to 'unsigned int' [-fpermissive]
46 | for (int i = 1; i <= n; ++i) cin >> a + i;;
| ~~^~~
| |
| int*
mag.cpp:46:40: error: cannot bind rvalue '(unsigned int)(((int*)(& a)) + ((sizetype)(((long unsigned int)i) * 4)))' to 'unsigned int&'
In file included 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 mag.cpp:1:
/usr/include/c++/10/istream:186:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long int&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]' (near match)
186 | operator>>(long& __n)
| ^~~~~~~~
/usr/include/c++/10/istream:186:7: note: conversion of argument 1 would be ill-formed:
mag.cpp:46:40: error: invalid conversion from 'int*' to 'long int' [-fpermissive]
46 | for (int i = 1; i <= n; ++i) cin >> a + i;;
| ~~^~~
| |
| int*
mag.cpp:46:40: error: cannot bind rvalue '(long int)(((int*)(& a)) + ((sizetype)(((long unsigned int)i) * 4)))' to 'long int&'
In file included 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 mag.cpp:1:
/usr/include/c++/10/istream:190:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]' (near match)
190 | operator>>(unsigned long& __n)
| ^~~~~~~~
/usr/include/c++/10/istream:190:7: note: conversion of argument 1 would be ill-formed:
mag.cpp:46:40: error: invalid conversion from 'int*' to 'long unsigned int' [-fpermissive]
46 | for (int i = 1; i <= n; ++i) cin >> a + i;;
| ~~^~~
| |
| int*
mag.cpp:46:40: error: cannot bind rvalue '(long unsigned int)(((int*)(& a)) + ((sizetype)(((long unsigned int)i) * 4)))' to 'long unsigned int&'
In file included 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 mag.cpp:1:
/usr/include/c++/10/istream:195:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long int&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]' (near match)
195 | operator>>(long long& __n)
| ^~~~~~~~
/usr/include/c++/10/istream:195:7: note: conversion of argument 1 would be ill-formed:
mag.cpp:46:40: error: invalid conversion from 'int*' to 'long long int' [-fpermissive]
46 | for (int i = 1; i <= n; ++i) cin >> a + i;;
| ~~^~~
| |
| int*
mag.cpp:46:40: error: cannot bind rvalue '(long long int)(((int*)(& a)) + ((sizetype)(((long unsigned int)i) * 4)))' to 'long long int&'
In file included 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 mag.cpp:1:
/usr/include/c++/10/istream:199:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]' (near match)
199 | operator>>(unsigned long long& __n)
| ^~~~~~~~
/usr/include/c++/10/istream:199:7: note: conversion of argument 1 would be ill-formed:
mag.cpp:46:40: error: invalid conversion from 'int*' to 'long long unsigned int' [-fpermissive]
46 | for (int i = 1; i <= n; ++i) cin >> a + i;;
| ~~^~~
| |
| int*
mag.cpp:46:40: error: cannot bind rvalue '(long long unsigned int)(((int*)(& a)) + ((sizetype)(((long unsigned int)i) * 4)))' to 'long long unsigned int&'
In file included 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 mag.cpp:1:
/usr/include/c++/10/istream:235:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(void*&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]' (near match)
235 | operator>>(void*& __p)
| ^~~~~~~~
/usr/include/c++/10/istream:235:7: note: conversion of argument 1 would be ill-formed:
mag.cpp:46:40: error: cannot bind non-const lvalue reference of type 'void*&' to an rvalue of type 'void*'
46 | for (int i = 1; i <= n; ++i) cin >> a + i;;
| ~~^~~
In file included 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 mag.cpp:1:
/usr/include/c++/10/istream:120:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_istream<_CharT, _Traits>::__istream_type& (*)(std::basic_istream<_CharT, _Traits>::__istream_type&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]'
120 | operator>>(__istream_type& (*__pf)(__istream_type&))
| ^~~~~~~~
/usr/include/c++/10/istream:120:36: note: no known conversion for argument 1 from 'int*' to 'std::basic_istream<char>::__istream_type& (*)(std::basic_istream<char>::__istream_type&)' {aka 'std::basic_istream<char>& (*)(std::basic_istream<char>&)'}
120 | operator>>(__istream_type& (*__pf)(__istream_type&))
| ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/10/istream:124:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_istream<_CharT, _Traits>::__ios_type& (*)(std::basic_istream<_CharT, _Traits>::__ios_type&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>; std::basic_istream<_CharT, _Traits>::__ios_type = std::basic_ios<char>]'
124 | operator>>(__ios_type& (*__pf)(__ios_type&))
| ^~~~~~~~
/usr/include/c++/10/istream:124:32: note: no known conversion for argument 1 from 'int*' to 'std::basic_istream<char>::__ios_type& (*)(std::basic_istream<char>::__ios_type&)' {aka 'std::basic_ios<char>& (*)(std::basic_ios<char>&)'}
124 | operator>>(__ios_type& (*__pf)(__ios_type&))
| ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
/usr/include/c++/10/istream:131:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(std::ios_base& (*)(std::ios_base&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]'
131 | operator>>(ios_base& (*__pf)(ios_base&))
| ^~~~~~~~
/usr/include/c++/10/istream:131:30: note: no known conversion for argument 1 from 'int*' to 'std::ios_base& (*)(std::ios_base&)'
131 | operator>>(ios_base& (*__pf)(ios_base&))
| ~~~~~~~~~~~~^~~~~~~~~~~~~~~~
/usr/include/c++/10/istream:214:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(float&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]'
214 | operator>>(float& __f)
| ^~~~~~~~
/usr/include/c++/10/istream:214:25: note: no known conversion for argument 1 from 'int*' to 'float&'
214 | operator>>(float& __f)
| ~~~~~~~^~~
/usr/include/c++/10/istream:218:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(double&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]'
218 | operator>>(double& __f)
| ^~~~~~~~
/usr/include/c++/10/istream:218:26: note: no known conversion for argument 1 from 'int*' to 'double&'
218 | operator>>(double& __f)
| ~~~~~~~~^~~
/usr/include/c++/10/istream:222:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long double&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]'
222 | operator>>(long double& __f)
| ^~~~~~~~
/usr/include/c++/10/istream:222:31: note: no known conversion for argument 1 from 'int*' to 'long double&'
222 | operator>>(long double& __f)
| ~~~~~~~~~~~~~^~~
/usr/include/c++/10/istream:259:7: note: candidate: 'std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_istream<_CharT, _Traits>::__streambuf_type*) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__streambuf_type = std::basic_streambuf<char>]'
259 | operator>>(__streambuf_type* __sb);
| ^~~~~~~~
/usr/include/c++/10/istream:259:36: note: no known conversion for argument 1 from 'int*' to 'std::basic_istream<char>::__streambuf_type*' {aka 'std::basic_streambuf<char>*'}
259 | operator>>(__streambuf_type* __sb);
| ~~~~~~~~~~~~~~~~~~^~~~
In file included from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:45,
from mag.cpp:1:
/usr/include/c++/10/cstddef:130:5: note: candidate: 'template<class _IntegerType> constexpr std::__byte_op_t<_IntegerType> std::operator>>(std::byte, _IntegerType)'
130 | operator>>(byte __b, _IntegerType __shift) noexcept
| ^~~~~~~~
/usr/include/c++/10/cstddef:130:5: note: template argument deduction/substitution failed:
mag.cpp:46:31: note: cannot convert 'std::cin' (type 'std::istream' {aka 'std::basic_istream<char>'}) to type 'std::byte'
46 | for (int i = 1; i <= n; ++i) cin >> a + i;;
| ^~~
In file included from /usr/include/c++/10/string:56,
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 mag.cpp:1:
/usr/include/c++/10/bits/basic_string.tcc:1476:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, std::__cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
1476 | operator>>(basic_istream<_CharT, _Traits>& __in,
| ^~~~~~~~
/usr/include/c++/10/bits/basic_string.tcc:1476:5: note: template argument deduction/substitution failed:
mag.cpp:46:42: note: mismatched