兔子五元一只，鸡三元一只，小鸭子一元三只，现在你有一百元要买一百只，兔子、鸡、鸭子，问兔子、鸡、鸭子各买多少只，每种必须至少一只，下列哪个程序能实现。（ ）。
for (int i = 0; i <= 100; i++) {
for (int j = 0; j <= 100; j++) {
for (int k = 0; k <= 100; k++) {
if(i + j + k == 100 && 25 * i + 10 * j + k == 300)
cout << i << " " << j << " " << k << endl;
}
}
}
for (int i = 0; i <= 100; i++) {
for (int j = 0; j <= 100; j++) {
for (int k = 0; k <= 100; k++) {
if(i + j + k == 100 && 20 * i + 10 * j + k == 300)
cout << i << " " << j << " " << k << endl;
}
}
}
for (int i = 0; i <= 20; i++) {
for (int j = 0; j <= 34; j++) {
for (int k = 0; k <= 20; k++) {
if(i + j + k == 100 && 15 * i + 9 * j + k == 300)
cout << i << " " << j << " " << k << endl;
}
}
}
for (int i = 0; i <= 100; i++) {
for (int j = 0; j <= 100; j++) {
for (int k = 0; k <= 100; k++) {
if(i + j + k == 100 && 15 * i + 9 * j + k == 300)
cout << i << " " << j << " " << k << endl;
}
}
}