519C - A and B and Team Training - CodeForces Solution

#include<bits/stdc++.h>
/*
author:- laksheya_0809
*/
using namespace std;

#define int long long
#define ii pair<int, int>
#define vi vector<int>
#define pb push_back
#define ppb pop_back
#define vvi vector<vi>
#define vii vector<ii>
#define ln << '\n'
#define sz(x) (int)((x).size())
#define _for(s, n, upd) for(int i = s; i < n; i+=upd)
#define rep(i, s, n) for(int i = s; i < (n); i++)
#define all(x) (x).begin(), (x).end()
#define allr(x) (x).rbegin(), (x).rend()
#define fill(x, y) memset(x, y, sizeof x) 
#define ump unordered_map
const int MOD = 1e9+7;

void sol() {
    int n, m; cin >> n >> m;
    int teams = 0;
    while(n > 0 && m > 0) {
        if(n > m) {
            n -= 2;
            m -= 1;
        } else {
            m -= 2;
            n -= 1;
        }
        if(n >= 0 && m >= 0)
            teams++;
    }
    cout << teams ln;
}



signed main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    int t = 1;
    // cin >> t;
    while(t--) sol();
    return 0;
}