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Submission #341452

# Submission time Handle Problem Language Result Execution time Memory
341452 2020-12-29T18:20:30 Z ryansee Monochrome Points (JOI20_monochrome) C++14
0 / 100
 1 ms 492 KB 
#include "bits/stdc++.h"
using namespace std;
 
#define FAST ios_base::sync_with_stdio(false); cin.tie(0);
#define pb push_back
#define eb emplace_back
#define ins insert
#define f first
#define s second
#define cbr cerr<<"hi\n"
#define mmst(x, v) memset((x), v, sizeof ((x)))
#define siz(x) ll(x.size())
#define all(x) (x).begin(), (x).end()
#define lbd(x,y) (lower_bound(all(x),y)-x.begin())
#define ubd(x,y) (upper_bound(all(x),y)-x.begin())
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());    //can be used by calling rng() or shuffle(A, A+n, rng)
inline long long rand(long long x, long long y) { return rng() % (y+1-x) + x; } //inclusivesss
string inline to_string(char c) {string s(1,c);return s;} template<typename T> inline T gcd(T a,T b){ return a==0?llabs(b):gcd(b%a,a); }
 
using ll=long long; 
using ld=long double;
#define FOR(i,s,e) for(ll i=s;i<=ll(e);++i)
#define DEC(i,s,e) for(ll i=s;i>=ll(e);--i)
using pi=pair<ll,ll>; using spi=pair<ll,pi>; using dpi=pair<pi,pi>; 
 
long long LLINF = 1e18;
int INF = 1e9+1e6;
#define MAXN (400006)
ll n, ans;
deque<char> A;
ll nC2(ll n) { return n * (n-1) / 2; }
ll lol() {
	ll ans = 0, grad = 0;
	FOR(i,0,n-1) {
		//if(A[i] == A[n+i]) {
			if(A[i] == 'W') {
				-- grad;
			} else if(A[n+i] == 'B') {
				++ grad;
			}
		//}
		ans += abs(grad);
	}
	assert(grad == 0);
	return nC2(n) - ans;
}
int main() {
	FAST
	cin>>n;
	A.resize(n*2);
	for(auto&i:A)cin>>i;
	FOR(i,0,n*2-1) {
		ans = max(ans, lol());
		A.eb(A[0]), A.pop_front();
	}
	cout<<ans<<'\n';
}

Subtask #1
0.0 / 4.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 492 KB Execution killed with signal 6 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #2
0.0 / 21.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 492 KB Execution killed with signal 6 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #3
0.0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 492 KB Execution killed with signal 6 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #4
0.0 / 65.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 492 KB Execution killed with signal 6 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -