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第一次做最大和子段,一次ac,16ms#include<iostream>
using namespace std;
int rec[101][101];
//int m=0;
//void get(int ans[101],int nums)
//{
// int b = 0;
// for(int i=0;i<nums;i++)
// {
// if(b<0)
// b = ans[i];
// else
// b +=ans[i];
// if(b>m)
// m = b;
// }
//}
int main()
{
int nums;
int result[101];
cin>>nums;
int m=0;
for(int i=0;i<nums;i++)
{
for(int j=0;j<nums;j++)
{
cin>>rec[i][j];
}
}
for(int i=0;i<nums;i++)
{
memset(result,0,sizeof(result));
for(int j=i;j<nums;j++)
{
int b = 0;
for(int k=0;k<=nums;k++)
{
result[k]+=rec[j][k];
if(b<=0)
b = result[k];
else
b +=result[k];
if(b>m)
m=b;
}
}
}
cout<<m<<endl;
return 0;
}
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