> #include <cstring>
> #include <cstdio>
> using namespace std;
> typedef long long int _int64;
> _int64 a[501][501],b[501][501];
> _int64 abs(_int64 a) { return (a>0) ? a : -a; }
> int m,n;
> int main()
> {
> 	while(scanf("%d %d",&m,&n)==2) {
> 		if(!m&&!n) break;
> 		_int64 min=(_int64)65535*500*500;
> 		for(int i=1;i<=m;i++)
> 			for(int j=1;j<=n;j++) scanf("%lld",&a[i][j]);
> 		for(int i=1;i<=m;i++)
> 			for(int j=1;j<=n;j++) b[i][j]=b[i-1][j]+b[i][j-1]-b[i-1][j-1]+a[i][j];
> 		for(int i=1;i<m;i++)
> 			for(int j=1;j<n;j++) {
> 				_int64 x=b[i][j],y=b[m][j]-b[i][j],
> 				    z=b[m][n]-b[m][j];
> 				_int64 t=abs(x-y)+abs(y-z)+abs(z-x);
> 				if(t<min) min=t;
> 			}
> 		printf("%lld\n",min);
> 	}
> }
> --
> I have use 64-bit before, still get WA

• Re:i think perhaps you have missed some cases (124) Windows2k 2005-06-03 16:37:30
  • Re:i think perhaps you have missed some cases (1190) Windows2k 2005-06-04 12:55:06
    • there are 4 ways of partitioning in total, but i only find 3 in your code (1276) 00448264 2005-06-04 13:15:10
      • Re:there are 4 ways of partitioning in total, but i only find 3 in your code (192) Windows2k 2005-06-04 16:32:43
        • what about... (29) frkstyc 2005-06-04 16:42:41
          • Re:what about... (1579) Windows2k 2005-06-05 09:40:33
            • try using printf("%I64d",...) to output long long, using "%lld" seems to produce wa in many cases (1685) frkstyc 2005-06-05 10:44:24
              • Re:try using printf("%I64d",...) to output long long, using "%lld" seems to produce wa in many cases (45) b4die 2005-07-22 13:49:46
                • I agree with you! (51) Sempr 2006-06-05 23:02:58
                  • just do it (0) frkstyc 2006-06-05 23:10:01
                    • but I failed again and again! (0) oeym 2006-06-06 08:47:57
                      • 晕死！！忘了在函数里写 return WA了我一个早晨.....不过....为什么我本地编译并且调试正确了呢？？ (0) Sempr 2006-06-06 09:24:40
                • Re:try using printf("%I64d",...) to output long long, using "%lld" seems to produce wa in many cases (51) 1272406003 2009-10-26 22:12:33