20 lines
542 B
JavaScript
20 lines
542 B
JavaScript
#!/usr/bin/env node
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var fs = require('fs');
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var data = fs.readFileSync(process.argv[2],'utf8').split('\n').filter(i=>i).map(i=>i.split(' ').map(i=>parseInt(i)));
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var safety_count = 0;
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function isreportsafe(report) {
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var first = report.slice(0,-1);
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var diffs = first.map((elem,idx)=>report[idx+1]-elem);
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if(diffs[0]<0) { //Is negative
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diffs = diffs.map(i=>-i); //Negate it
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}
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return !diffs.some(i=>(i<1 || i>3));
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}
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var safety_count = data.reduce((acc,report)=>acc+(isreportsafe(report)?1:0),0);
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console.log('Result:',safety_count); |