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#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int maxn = 5e5 + 10;
const ll INF = 1e9;

I think I found a bug in the gfortran compiler related to compiling legacy code. (such as F77 specified by -std=legacy or -std=f90  or anything older than f95 )
This relates to floating point math. I can try to report it, though I think I won't be taken seriously, as it relates to a very old code base that became archived in 2022.
yeah, looking into that, I cant raise issues with it, because it has been archived.

Affected files:

#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <math.h>

function scriptGraphicOptional(booleanMatrixOriginal,booleanMatrix,matrixAND)
I=mat2gray(booleanMatrixOriginal,[1 0])
II=mat2gray(booleanMatrix,[1 0])
III=mat2gray(matrixAND,[1 0])
IV=mat2gray((booleanMatrixOriginal+booleanMatrix),[1 0])

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