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#include <stdio.h>
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void trirea(float *a,int *la,int *ir)
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{
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int iu[21], il[21], i, m, j, k, ij, l, itt, it ;
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float t, tt, r ;
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if (*la<=0) return ;
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m = 1 ;
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i = 1 ;
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j = *la ;
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r = 0.375 ;
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lab5 : if (i==j) goto lab45 ;
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if (r>0.5898437) goto lab10 ;
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r = r + 3.90625e-2 ;
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goto lab15 ;
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lab10 : r = r - 0.21875 ;
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lab15 : k = i ;
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ij = i+(j-i)*r ;
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t = a[ij-1] ;
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it = ir[ij-1] ;
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if (a[i-1]<=t) goto lab20 ;
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a[ij-1] = a[i-1] ;
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a[i-1] = t ;
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t = a[ij-1] ;
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ir[ij-1] = ir[i-1] ;
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ir[i-1] = it ;
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it = ir[ij-1] ;
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lab20 : l = j ;
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if (a[j-1]>=t) goto lab30 ;
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a[ij-1] = a[j-1] ;
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a[j-1] = t ;
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t = a[ij-1] ;
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ir[ij-1] = ir[j-1] ;
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ir[j-1] = it ;
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it = ir[ij-1] ;
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if (a[i-1]<=t) goto lab30 ;
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a[ij-1] = a[i-1] ;
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a[i-1] = t ;
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t = a[ij-1] ;
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ir[ij-1] = ir[i-1] ;
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ir[i-1] = it ;
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// it = ir[ij-1] ;
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goto lab30 ;
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lab25 : if (a[l-1]==a[k-1]) goto lab30 ;
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tt = a[l-1] ;
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a[l-1] = a[k-1] ;
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a[k-1] = tt ;
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itt = ir[l-1] ;
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ir[l-1] = ir[k-1] ;
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ir[k-1] = itt ;
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lab30 : l = l-1 ;
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if (a[l-1]>t) goto lab30 ; ;
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lab35 : k = k+1 ;
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if (a[k-1]<t) goto lab35 ;
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if (k<=l) goto lab25 ;
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if ((l-i)<=(j-k)) goto lab40 ;
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il[m-1] = i ;
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iu[m-1] = l ;
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i = k ;
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m = m+1 ;
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goto lab50 ;
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lab40 : il[m-1] = k ;
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iu[m-1] = j ;
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j = l ;
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m = m+1 ;
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goto lab50 ;
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lab45 : m = m-1 ;
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if (m==0) return ;
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i = il[m-1] ;
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j = iu[m-1] ;
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lab50 : if ((j-i)>=11) goto lab15 ;
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if (i==1) goto lab5 ;
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i = i-1 ; ;
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lab55 : i = i+1 ;
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if (i==j) goto lab45 ;
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t = a[i] ;
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it = ir[i] ;
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if (a[i-1]<=t) goto lab55 ;
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k = i ;
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lab60 : a[k] = a[k-1] ;
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ir[k] = ir[k-1] ;
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k = k-1 ;
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if (t<a[k-1]) goto lab60 ;
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a[k] = t ;
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ir[k] = it ;
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goto lab55 ;
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}
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