#include <bits/stdc++.h> using namespace std; // void __dbg() { cout << endl; } // template<typename Arg, typename... Args> void __dbg(Arg A, Args... B) { cout << " " << A; __dbg(B...); } // #define dbg(...) cout << "(" << #_VA_ARGS_ << "):", _dbg(VA_ARGS_) #define rep(i,a,b) for(int i=a;i<b;++i) #define lprin(n) printf("%lld\n", n) #define lpri(n) printf("%lld ", n) #define lscn(n) scanf("%lld", &n) #define prin(n) printf("%d\n", n) #define pri(n) printf("%d ", n) #define scn(n) scanf("%d", &n) #define vi vector<int> #define ll long long #define pb push_back #define F first #define S second const int inf = INT_MAX; const int ninf = INT_MIN; const int mod = 1e9 + 7; const int maxN = 2e5 + 2; vector<int> adj[maxN]; int lcnt[maxN]; void dfs(int u, int p) { bool is_leaf = 1; for(int v : adj[u]) { if(v != p) { dfs(v, u); lcnt[u] += lcnt[v]; is_leaf = 0; } } if(is_leaf) lcnt[u] = 1; } int main() { int n; scn(n); rep(i, 0, n - 1) { int u, v; scn(u); scn(v); adj[u].pb(v); adj[v].pb(u); } dfs(1, -1); rep(i, 1, n + 1) pri(lcnt[i] % 2); return 0; } // #include<bits/stdc++.h> // using namespace std; // int main() // { // int n; // cin>>n; // vector<int> a(n); // vector<int> b(n); // for (int i=0;i<100;i++) // cin>>a[i]; // for (int i=0;i<100;i++) // cin>>b[i]; // int cnt=0; // for (int i=0;i<100;i++) // { // if (a[i]==b[i]) // cnt++; // } // cout<<cnt<<"\n"; // return 0; // }
Write, Run & Share C++ code online using OneCompiler's C++ online compiler for free. It's one of the robust, feature-rich online compilers for C++ language, running on the latest version 17. Getting started with the OneCompiler's C++ compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as C++
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OneCompiler's C++ online compiler supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample program which takes name as input and print your name with hello.
#include <iostream>
#include <string>
using namespace std;
int main()
{
string name;
cout << "Enter name:";
getline (cin, name);
cout << "Hello " << name;
return 0;
}
C++ is a widely used middle-level programming language.
When ever you want to perform a set of operations based on a condition If-Else is used.
if(conditional-expression) {
//code
}
else {
//code
}
You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.
Switch is an alternative to If-Else-If ladder.
switch(conditional-expression){
case value1:
// code
break; // optional
case value2:
// code
break; // optional
......
default:
code to be executed when all the above cases are not matched;
}
For loop is used to iterate a set of statements based on a condition.
for(Initialization; Condition; Increment/decrement){
//code
}
While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.
while (condition) {
// code
}
Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.
do {
// code
} while (condition);
Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity. Function gets run only when it is called.
return_type function_name(parameters);
function_name (parameters)
return_type function_name(parameters) {
// code
}