Submission #890938
Source Code Expand
#include <bits/stdc++.h> using namespace std; #define ll long long #define vvi vector< vector<int> > #define vi vector<int> #define All(X) X.begin(),X.end() #define FOR(i,a,b) for(int i=(int)(a);i<(int)(b);i++) #define REP(i,n) for(int i=0;i<(int)(n);i++) #define pb push_back #define pii pair<int,int> #define mp make_pair #define pi 3.14159265359 #define shosu(X) fixed << setprecision(X) ll gcd(ll a,ll b){return b?gcd(b,a%b):a;} ll lcm(ll a,ll b){return a/gcd(a,b)*b;} bool int a[100001]; int main(){ int n; cin >> n; REP(i,n) cin >> a[i]; int cnt = 0; REP(i,n) if(a[a[i]] == i) cnt++; cout << cnt /2 << endl; }
Submission Info
Submission Time | |
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Task | B - Friendly Rabbits |
User | lp6m |
Language | C++14 (GCC 5.4.1) |
Score | 0 |
Code Size | 646 Byte |
Status | CE |
Compile Error
./Main.cpp:17:18: error: two or more data types in declaration of ‘a’ bool int a[100001]; ^ ./Main.cpp: In function ‘int main()’: ./Main.cpp:21:18: error: ‘a’ was not declared in this scope REP(i,n) cin >> a[i]; ^ ./Main.cpp:23:14: error: ‘a’ was not declared in this scope REP(i,n) if(a[a[i]] == i) cnt++; ^