牛客周赛 Round 104 A
#牛客创作赏金赛#
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define INF ((int)1e18)
#define double long double
#define endl "\n"
#define PII pair<int,int>
#define pb push_back
#define ar2 array<int,2>
#define ar3 array<int,3>
#define ar4 array<int,4>
#define PI acos(-1.0)
#define xx first
#define yy second
const int N = 1;
void solve()
{
int ans=0;
for(int i=1;i<=4;i++){
int x;cin>>x;
if(x==i)ans++;
}
cout<<ans<<endl;
}
signed main()
{
ios::sync_with_stdio(false);
cin.tie(0), cout.tie(0);
int T = 1;
// cin >> T;
while(T--)
{
solve();
}
return 0;
}
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define INF ((int)1e18)
#define double long double
#define endl "\n"
#define PII pair<int,int>
#define pb push_back
#define ar2 array<int,2>
#define ar3 array<int,3>
#define ar4 array<int,4>
#define PI acos(-1.0)
#define xx first
#define yy second
const int N = 1;
void solve()
{
int ans=0;
for(int i=1;i<=4;i++){
int x;cin>>x;
if(x==i)ans++;
}
cout<<ans<<endl;
}
signed main()
{
ios::sync_with_stdio(false);
cin.tie(0), cout.tie(0);
int T = 1;
// cin >> T;
while(T--)
{
solve();
}
return 0;
}
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