26:I[91452,["/_next/static/chunks/f915c07274536659.js?dpl=dpl_6MnXruQRBVToNztnTT8CLMLZMzdp","/_next/static/chunks/b100b36337f58b96.js?dpl=dpl_6MnXruQRBVToNztnTT8CLMLZMzdp","/_next/static/chunks/44f9947f31017eda.js?dpl=dpl_6MnXruQRBVToNztnTT8CLMLZMzdp","/_next/static/chunks/1f34752723866743.js?dpl=dpl_6MnXruQRBVToNztnTT8CLMLZMzdp","/_next/static/chunks/06238a0ba6e2450a.js?dpl=dpl_6MnXruQRBVToNztnTT8CLMLZMzdp","/_next/static/chunks/1fe50d1faa3d3f5b.js?dpl=dpl_6MnXruQRBVToNztnTT8CLMLZMzdp","/_next/static/chunks/a068ae4bba82be06.js?dpl=dpl_6MnXruQRBVToNztnTT8CLMLZMzdp","/_next/static/chunks/135849583f9affe4.js?dpl=dpl_6MnXruQRBVToNztnTT8CLMLZMzdp"],"ProblemHintSolution"] 21:["$","path","mthhwq",{"d":"m9 18 6-6-6-6"}] 22:["$","span",null,{"className":"text-foreground font-medium truncate max-w-[150px] sm:max-w-[200px] md:max-w-[250px] lg:max-w-[300px]","title":"integer on each cell of N x N+1","children":"integer on each cell of N x N+1"}] 25:T52f,An integer is written in each cell of a board of

N

rows and

N + 1

columns. Prove that some columns (possibly none) can be deleted so that in each row the sum of the numbers left uncrossed out is even.

Problem Statement