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38 lines
1.2 KiB
C++
38 lines
1.2 KiB
C++
#define _CRT_SECURE_NO_WARNINGS
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#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
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#include <bits/stdc++.h>
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using namespace std;
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using ll = long long;
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const int N = 2e5 + 50;
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char str[N];
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int main() {
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int n, ans = 0;
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scanf("%d%s", &n, str);
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for (int i = 1; i < n - 1; i++) {
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if (str[i - 1] == str[i]) {
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if (str[i - 1] == 'R' && str[i + 1] == 'G' || str[i - 1] == 'G' && str[i + 1] == 'R')
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str[i] = 'B';
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else if (str[i - 1] == 'B' && str[i + 1] == 'G' || str[i - 1] == 'G' && str[i + 1] == 'B')
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str[i] = 'R';
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else if (str[i - 1] == 'B' && str[i + 1] == 'R' || str[i - 1] == 'R' && str[i + 1] == 'B')
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str[i] = 'G';
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else if (str[i - 1] == 'B' && str[i + 1] == 'B')
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str[i] = 'R';
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else if (str[i - 1] == 'R' && str[i + 1] == 'R')
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str[i] = 'G';
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else if (str[i - 1] == 'G' && str[i + 1] == 'G')
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str[i] = 'R';
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ans++;
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}
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}
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if (str[n - 1] == str[n - 2]) {
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str[n - 1] = "RG"[str[n - 1] != 'G'];
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ans++;
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}
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printf("%d\n%s", ans, str);
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return 0;
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}
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