http://poj.org/problem?id=2078 #include "stdio.h" int a[10][10], ans, n; int k[10],sum[10]; void doit( int s ) { int i, maxv; if( s == n ) { maxv = -1; for( i=0; i<n; i++ ) if( sum[i] > maxv ) maxv = sum[i]; ans = maxv; return; } for( k[s]=0; k[s]<n; k[s]++ ) { for( i=0; i<n; i++ ) { sum[i] += a[s][ (k[s]+i)%n ]; if( sum[i] > ans ) break; } if( i == n )doit( s+1 ); for( ; i>=0; i-- ) sum[i] -= a[s][ (k[s]+i)%n ]; } } int main() { int cas, i, j; while( 1 ) { scanf( "%dn", &n ); if( n < 0 ) break; for( i=0; i<n; i++ ) for( j=0; j<n; j++ ) scanf( "%d", &a[i][j] ); ans = 999999; for( i=0; i<n; i++ ) sum[i] = 0; doit( 0 ); printf( "%dn", ans ); } return 0; }
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