Battle Simulation

#include <iostream>
#include <string>

const int N = 1e6;
int input [N];

int main() {
	std::ios_base::sync_with_stdio(false);
	std::cin.tie(0);
	
	std::string str;
	std::cin >> str;
	int n = str.size();

	for (int i = 0; i < n; ++i) {
		if (str[i] == 'R') input[i] = 1;
		if (str[i] == 'B') input[i]= 2;
		if (str[i] == 'L') input[i] = 4;
	}
	for (int i = 0; i < n; ++i) {
		if (i + 2 < n) {
			if ((input[i] | input[i+1] |input[i+2]) == 7) {
				std::cout << 'C';
				i += 2;
				continue;
			}
		}
		if (input[i] == 1) std::cout << 'S';
		if (input[i] == 2) std::cout << 'K';
		if (input[i] == 4) std::cout << 'H';
	}
	std::cout << '\n';
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED

Test 14

Verdict: ACCEPTED

Test 15

Verdict: ACCEPTED

Test 16

Verdict: ACCEPTED