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int min=0; //如果要求max类似
for( x1=1; x1<=60; x1++ )
for( x2=1; x2<=440/6; x2++ )
for( x3=1; x3<=110; x3++ )
{
if(440 == 4*x1+6*x2+4*x3 && 480 == 8*x1+2*x2+4*x3)
{
temp = 60*x1+50*x2+40*x3;
if( min > temp )
{
min = temp;
_x1=x1, _x2=x2, _x3=x3;
}
}
}