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  • UVa 507

    动态规划

     1 #include <iostream>
     2 #include <cstring>
     3 #include <cstdio>
     4 using namespace std;
     5 
     6 #define MAXN 20002
     7 
     8 int routes,stopNum;
     9 int stops[MAXN];
    10 int maxSum,st,en,newSt;
    11 
    12 int main()
    13 {
    14     #ifndef ONLINE_JUDGE
    15         freopen("D:\acm.txt","r",stdin);
    16     #endif // ONLINE_JUDGE
    17 
    18     cin>>routes;
    19     for(int i = 1;i <= routes;i++){
    20         memset(stops,0,sizeof(stops));
    21         maxSum = 0;newSt = st = en = 1;
    22         cin >> stopNum;
    23         for(int j = 1;j < stopNum;j++) cin>>stops[j];
    24         ////////////////////////////
    25         int m,sum = 0;
    26         for(m = 1;m < stopNum;m++){
    27             if(sum < 0){
    28                 sum = 0;
    29                 st = m;//更新起点
    30             }
    31             sum += stops[m];
    32             if(sum > maxSum || (sum == maxSum && m - st > en - newSt))//和相等时取长度大的;长度相同时,取起点最小的。
    33             {
    34                 maxSum = sum;
    35                 newSt = st;
    36                 en = m;
    37             }
    38         }
    39         if(maxSum > 0)
    40             cout<<"The nicest part of route "<<i<<" is between stops "<<newSt<<" and "<<en + 1<<endl;
    41         else
    42             cout<<"Route "<< i <<" has no nice parts"<<endl;
    43     }
    44     return 0;
    45 }
    Donghua University
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  • 原文地址:https://www.cnblogs.com/ohxiaobai/p/4396255.html
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