#include <bits/stdc++.h>
using namespace std;
#define scd(t) scanf("%d", &t)
#define sclld(t) scanf("%lld", &t);
#define forr(i, l, r) for(int i=l; i<r; i++)
#define frange(i, l) forr(i, 0, l)
#define pb push_back
#define mp make_pair
#define f first
#define s second
#define all(x) x.begin(), x.end()
typedef vector<int> vi;
typedef pair<int, int> pii;
typedef vector<pii> vii;
typedef long long lli;
typedef vector<vi> vvi;
typedef vector<lli> vll;
typedef vector<bool> vb;
typedef set<int> seti;
void usaco() {
freopen("/media/hariaakash646/785EF1075EF0BF46/CompetitiveProgramming/input.in", "r", stdin);
}
int n;
int calc(string t, string s) {
int ans = 0;
for(int i=1; i<=n; i++) {
int pos = -1;
for(ll j=i; j<=n; j++) {
if(s[j]==t[i]) {
pos = j;
break;
}
}
ans += abs(pos-i);
for(int j=pos; j>i; j--) swap(s[j], s[j-1]);
}
return ans;
}
int main() {
// usaco();
string str;
cin >> n >> str;
int rc = 0;
int gc = 0;
int yc = 0;
frange(i, n) {
if(str[i] == 'R') rc++;
else if(str[i] == 'G') gc++;
else yc++;
}
// if(rc == gc) {
// string str1, str2;
// frange(i, n) {
// if(i % 2) {
// str1 += 'R';
// str2 += 'G';
// }
// else {
// str1 += 'G';
// str2 += 'R';
// }
// }
// printf("%lld", min(dist(str, str1), dist(str, str2)));
// }
// else if(rc == gc+1) {
// string str1;
// frange(i, n) {
// if(i % 2==0) str1 += 'R';
// else str1 += 'G';
// }
// printf("%lld", dist(str, str1));
// }
// else if(rc == gc-1) {
// string str1;
// frange(i, n) {
// if(i % 2) str1 += 'R';
// else str1 += 'G';
// }
// printf("%lld", dist(str, str1));
// }
// else printf("-1");
int mi = 1e9;
int x = 1;
frange(i, n) x *= 3;
frange(i, x) {
string out;
int v = i;
int pr = 5;
bool done = false;
int rt = 0, gt = 0, yt= 0;
frange(j, n) {
if(v % 3 == pr) {
done = true;
break;
}
if(v % 3 == 2) {out += 'R';rt++;}
else if(v % 3 == 1) {out += 'G'; gt++;}
else {out += 'Y'; yt++;}
pr = v % 3;
v /= 3;
}
if(rt != rc || gt != gc || yt != yc) continue;
if(done) continue;
mi = min(mi, dist(str, out));
}
if(mi < 1e9)
printf("%d", mi);
else printf("-1");
}
Compilation message
joi2019_ho_t3.cpp: In function 'int calc(std::string, std::string)':
joi2019_ho_t3.cpp:34:13: error: 'll' was not declared in this scope; did you mean 'vll'?
34 | for(ll j=i; j<=n; j++) {
| ^~
| vll
joi2019_ho_t3.cpp:34:21: error: 'j' was not declared in this scope
34 | for(ll j=i; j<=n; j++) {
| ^
joi2019_ho_t3.cpp: In function 'int main()':
joi2019_ho_t3.cpp:120:16: error: 'dist' was not declared in this scope
120 | mi = min(mi, dist(str, out));
| ^~~~
joi2019_ho_t3.cpp: In function 'void usaco()':
joi2019_ho_t3.cpp:25:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
25 | freopen("/media/hariaakash646/785EF1075EF0BF46/CompetitiveProgramming/input.in", "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
