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Add the initial EN translation for C++ code (#1346)

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Yudong Jin
2024-05-06 13:31:46 +08:00
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parent 9e4017b3fb
commit 8e60d12151
111 changed files with 6993 additions and 9 deletions
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en/codes/cpp/chapter_greedy/coin_change_greedy.cpp Normal file
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/**
* File: coin_change_greedy.cpp
* Created Time: 2023-07-20
* Author: krahets (krahets@163.com)
*/
#include "../utils/common.hpp"
/* Coin change: Greedy */
int coinChangeGreedy(vector<int> &coins, int amt) {
// Assume coins list is ordered
int i = coins.size() - 1;
int count = 0;
// Loop for greedy selection until no remaining amount
while (amt > 0) {
// Find the smallest coin close to and less than the remaining amount
while (i > 0 && coins[i] > amt) {
i--;
}
// Choose coins[i]
amt -= coins[i];
count++;
}
// If no feasible solution is found, return -1
return amt == 0 ? count : -1;
}
/* Driver Code */
int main() {
// Greedy: can ensure finding a global optimal solution
vector<int> coins = {1, 5, 10, 20, 50, 100};
int amt = 186;
int res = coinChangeGreedy(coins, amt);
cout << "\ncoins = ";
printVector(coins);
cout << "amt = " << amt << endl;
cout << "The minimum number of coins required to make up " << amt << " is " << res << endl;
// Greedy: cannot ensure finding a global optimal solution
coins = {1, 20, 50};
amt = 60;
res = coinChangeGreedy(coins, amt);
cout << "\ncoins = ";
printVector(coins);
cout << "amt = " << amt << endl;
cout << "The minimum number of coins required to make up " << amt << " is " << res << endl;
cout << "In reality, the minimum number needed is 3, i.e., 20 + 20 + 20" << endl;
// Greedy: cannot ensure finding a global optimal solution
coins = {1, 49, 50};
amt = 98;
res = coinChangeGreedy(coins, amt);
cout << "\ncoins = ";
printVector(coins);
cout << "amt = " << amt << endl;
cout << "The minimum number of coins required to make up " << amt << " is " << res << endl;
cout << "In reality, the minimum number needed is 2, i.e., 49 + 49" << endl;
return 0;
}