10 lines
238 B
JavaScript
10 lines
238 B
JavaScript
const n = require("fs").readFileSync(0,"utf8").toString().trim().split("\n");
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let cnt = 0;
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for(let i=1; i<=Number(n[0]); i++){
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const s = n[i].replace(/(.)\1+/g, "$1");
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if(new Set(s).size === s.length) cnt++;
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}
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console.log(cnt);
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