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我用的是动态规划,AC了,大家看看能不能继续改进一下??//PKU P10283(To The Max),等价于二维最大子段和 #include<iostream> using namespace std; #define N 101 int number[N][N],temp[N]; int n; void init(void) { //freopen("input.in","r",stdin); //freopen("output.out","w",stdout); cin>>n; for(int i=1;i<=n;i++) { for(int j=1;j<=n;j++) { cin>>number[i][j]; } } return; } void work(void) { int maxn=0; for(int x=1;x<=n;x++) { for(int y=x;y<=n;y++) { for(int z1=1;z1<=n;z1++) { temp[z1]=0; for(int z2=x;z2<=y;z2++) { temp[z1]+=number[z2][z1]; } } int b=0; for(int i=1;i<=n;i++) { if(b>=0)b+=temp[i]; else b=temp[i]; if(b>maxn)maxn=b; } } } cout<<maxn; return; } int main(void) { init(); work(); //system("pause"); return 0; } Followed by:
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