16 lines
503 B
JavaScript
16 lines
503 B
JavaScript
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#!/usr/bin/env node
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var input = require('fs').readFileSync(process.argv[2]||'input.txt','utf8').split('\n').filter(i=>i);
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var width = input.length;
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var sum=0;
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for(var i=1;i<width-1;++i) {
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for(var j=1;j<width-1;++j) {
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var isXMAS = input[i][j]=='A' && ((input[i-1][j-1]=='M'&&input[i+1][j+1]=='S') || (input[i-1][j-1]=='S'&&input[i+1][j+1]=='M')) && ((input[i-1][j+1]=='M'&&input[i+1][j-1]=='S') || (input[i-1][j+1]=='S'&&input[i+1][j-1]=='M'))
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if(isXMAS) ++sum;
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}
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}
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console.log('Result:',sum);
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