B_Ciel_and_Flowers.cpp

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef long double lld;
const long long mod = 1e9 + 7;
#define INF (1LL << 60)
#define inf (1 << 30)
#define all(x) (x).begin(), (x).end()

#ifndef ONLINE_JUDGE
#define debug(x) cerr << #x << " "; _print(x); cerr << endl;
#else
#define debug(x)
#endif

void _print(ll t) { cerr << t; }
void _print(int t) { cerr << t; }
void _print(string t) { cerr << t; }
void _print(char t) { cerr << t; }
void _print(lld t) { cerr << t; }
void _print(double t) { cerr << t; }
void _print(ull t) { cerr << t; }

template <class T, class V> void _print(pair <T, V> p);
template <class T> void _print(vector <T> v);
template <class T> void _print(set <T> v);

template <class T, class V> void _print(map <T, V> v);
template <class T> void _print(multiset <T> v);

template <class T, class V> void _print(pair <T, V> p) {
    cerr << "{"; _print(p.first); cerr << ","; _print(p.second); cerr << "}";
}
template <class T> void _print(vector <T> v) {
    cerr << "[ "; for (T i : v) {_print(i); cerr << " ";} cerr << "]";
}
template <class T> void _print(set <T> v) {
    cerr << "[ "; for (T i : v) {_print(i); cerr << " ";} cerr << "]";
}
template <class T> void _print(multiset <T> v) {
    cerr << "[ "; for (T i : v) {_print(i); cerr << " ";} cerr << "]";
}
template <class T, class V> void _print(map <T, V> v) {
    cerr << "[ "; for (auto i : v) {_print(i); cerr << " ";} cerr << "]";
}



void solve(){
    int r,g,b;
    cin>>r>>g>>b;
    int ans=0;
    int zero=(r/3)+(g/3)+(b/3);
    int one=r>0 && g>0 && b>0 ? 1+((r-1)/3)+((g-1)/3)+((b-1)/3):0;
    int two=r>1 && g>1 && b>1 ? 2+((r-2)/3)+((g-2)/3)+((b-2)/3):0;
    cout<<max({zero,one,two});


    
}

int main() {
    #ifndef ONLINE_JUDGE
        freopen("Error.txt", "w", stderr);
    #endif

    int test=1;
    // cin>>test;
    while(test--){
         solve();
    }
    
    return 0;
}