64 lines
1.5 KiB
C++
64 lines
1.5 KiB
C++
#include <stdio.h>
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#include <string.h>
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#define N 110
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#define eps 1e-8
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char map[N][N];
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double visit[N][N];
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double deal ( int c, int n, int m ) {
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int i, j;
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double ans = 0;
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memset ( visit, 0, sizeof ( visit ) );
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visit[ 0 ][ c ] = 1;
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for ( i = 0 ; i < n - 1 ; ++i ) {
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for ( j = 0 ; j < m ; ++j ) {
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if ( visit[ i ][ j ] > eps ) {
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if ( map[ i ][ j ] != '.' ) {
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ans += visit[ i ][ j ] * ( map[ i ][ j ] - '0' );
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}
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else {
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if ( map[ i + 1 ][ j ] != '*' ) {
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visit[ i + 1 ][ j ] += visit[ i ][ j ];
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}
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else {
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if ( j > 0 ) {
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visit[ i + 1 ][ j - 1 ] += visit[ i ][ j ] / 2;
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}
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if ( j < m - 1 ) {
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visit[ i + 1 ][ j + 1 ] += visit[ i ][ j ] / 2;
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}
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}
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}
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}
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}
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}
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for ( i = 0 ; i < m ; ++i ) { if ( map[ n - 1 ][ i ] != '*' && map[ n - 1 ][ i ] != '.' ) {
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ans += visit[ n - 1 ][ i ] * ( map[ n - 1 ][ i ] - '0' );
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}
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}
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return ans;
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}
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int main () {
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int i, n, m, t;
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double ans, temp;
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scanf ( "%d", &t );
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while ( t-- ) {
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scanf ( "%d%d", &n, &m );
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getchar();
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for ( i = 0 ; i < n ; ++i ) {
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gets( map[ i ] );
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if ( map[ i ][ 0 ] == '\0' ) --i;
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}
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ans = 0;
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for ( i = 0 ; i < m ; ++i ) {
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if ( map[ 0 ][ i ] != '.' ) {
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if ( map[ 0 ][ i ] == '*' ) temp = 0;
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else temp = map[ 0 ][ i ] - '0';
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}
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else temp = deal( i, n, m );
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if ( temp - ans > eps ) ans = temp;
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}
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printf ( "%.6lf\n", ans );
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}
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return 0;
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}
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