Node.js)백준 5525번: IOIOI

 

 https://www.acmicpc.net/problem/5525

const [N, M, S] = require('fs').readFileSync('./dev/stdin').toString().trim().split('\n');

let i = 0;
let cnt = 0;
let answer = 0;
while (i < +M - 1) {
	if (S.substring(i, i + 3) == 'IOI') {
		i += 2;
		cnt += 1;
		if (cnt == N) {
			answer += 1;
			cnt -= 1;
		}
	} else {
		i += 1;
		cnt = 0;
	}
}

console.log(answer);