codeforces 463 B Caisa and Pylons
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#include<iostream>#include<cstdio>#define MAXN 100000+5using namespace std;int h[MAXN];int main(){ int n,p,sum; cin>>n; p=0; for(int i=0;i<n;i++) { cin>>h[i]; if(i==0){p=0;sum=h[i];} else {p+=h[i-1]-h[i];if(p<0)sum-=p,p=0;} } cout<<sum<<endl; return 0;}
这道题坑我了我就,一直看错以为是WA at test 9,火大的改了5遍过后才发现是RE 边界数定义少了1个0,。不过也了解了一下runtime err 如果不是test 1 的话,一般都是数组越界了,其他是指针使用错误等。
题很简单,读懂就行
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