洛谷 P1089代码优化

P1089 津津的储蓄计划
https://www.luogu.org/problemnew/show/P1089
第一次写的代码：

#include
using namespace std;
int main()
{
 int budget[12];
 int balance[12];
 int result = 0;//不够用的月份
 int save = 0;//储蓄
 for (int i = 0; i < 12; i++)
 {
  cin >> budget[i];
 }
 balance[0] = (300 - budget[0]) % 100;
 if (balance[0] < 0)
  result = 1;
 else
 {
  save = (300 - budget[0]) / 100;
  for (int i = 1; i < 12; i++)
  {
   balance[i] = (balance[i - 1] + 300 - budget[i]) % 100;
   if (balance[i] < 0)
   {
    balance[i] = 0;
    result = i + 1;
    break;
   }
   save = save + (balance[i - 1] + 300 - budget[i]) / 100;
  }
 }
 if (result != 0)
  cout << -result << endl;
 else
  cout << balance[11] + save * 120 << endl;
 return 0;
}

修改后的代码简洁了很多：

#include
using namespace std;
int main()
{
 int budget[12];
 int save = 0, money = 0;
 for (int i = 0; i < 12; i++)
 {
  cin >> budget[i];
 }
 for (int i = 0; i < 12; i++)
 {
  save = (money + 300 - budget[i]) / 100 + save;
  money = (money + 300 - budget[i]) % 100;
  if (money < 0)
  {
   cout << -(i + 1) << endl;
   return 0;
  }
 }
 cout << money + 120 * save;
 return 0;
}

编程解决问题是注重结果的，过程不重要，甚至越简单越省时越好。