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Re:为什么dp数组定义在函数里面就RE,定义成全局变量就AC了In Reply To:为什么dp数组定义在函数里面就RE,定义成全局变量就AC了 Posted by:sdlllichao at 2013-09-18 09:45:24 c语言的问题吧,全局变量是存放在堆里面的,函数内的变量是存放在栈里面的,栈的容量远远小于堆 > #include <iostream> > #include <cstdio> > #include <cstring> > #define N 5002 > using namespace std; > short dp[N][N]; > int main() > { > int n; > while(cin>>n) > { > char *str1=new char[n+1]; > char *str2=new char[n+1]; > cin>>str1; > int i,j; > for(i=0;i<n;i++) > str2[i]=str1[n-i-1]; > str2[i]='\0'; > memset(dp,0,sizeof(dp)); > for(i=0;i<n;i++) > { > for(j=0;j<n;j++) > { > if(str1[i]==str2[j]) > dp[i+1][j+1]=dp[i][j]+1; > else > dp[i+1][j+1]=max(dp[i][j+1],dp[i+1][j]); > } > } > cout<<n-dp[n][n]<<endl; > } > return 0; > } Followed by:
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