Submission #497448

#	Time	Username	Problem	Language	Result	Execution time	Memory
497448		vinnipuh01	Growing Vegetable is Fun 3 (JOI19_ho_t3)	C++17	20 / 100	1082 ms	296 KiB

joi2019_ho_t3

#include <iostream>
#include <bits/stdc++.h>
#include <cmath>
#include <algorithm>
#include <vector>
#include <deque>
#include <set>
#include <stack>
#include <string>
#include <map>
#include <queue>
#define int long long

using namespace std;

const long long oo = 1000000000000000000;

long long  sum, ans = 0, mx = 0, mn = 1000000000, num, pos;


/*
    ViHHiPuh

   (( `'-""``""-'` ))
     )-__-_.._-__-(
   / --- (o _ o) --- \
   \ .-* ( .0. ) *-. /
   _'-. ,_ '=' _, .-'_
  / `;#'#'# - #'#'#;` \
 \_)) -----'#'----- ((_/
      # --------- #
  '# ------- ------ #'
  /..-'# ------- #'-.\
  _\...-\'# -- #'/-.../_
  ((____)- '#' -(____))


    cout << fixed << setprecision(6) << x;

    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    freopen ( "sum.in", "r", stdin )
*/

int n;
string s, ss;

int f( int o = 0 ) {
	if ( o == s.size() )
		return 0;
	int mnn = oo;
	int r, g, y;
	r = g = y = -1;
	for ( int i = o; i < s.size(); i ++ ) {
		if ( ss[ i ] == 'R' && !( ~r ) ) {
			r = i;
		}
		if ( ss[ i ] == 'Y' && !( ~y ) )
			y = i;
		if ( ss[ i ] == 'G' && !( ~g ) )
			g = i;
	}
	if ( o && ss[ o - 1 ] == 'Y' )
		y = -1;
	if ( o && ss[ o - 1 ] == 'G' )
		g = -1;
	if ( o && ss[ o - 1 ] == 'R' )
		r = -1;
	if ( r != -1 ) {
		for ( int i = r - 1; i >= o; i -- ) {
			swap( ss[ i ], ss[ i + 1 ] );
		} 
		mnn = min( mnn, f( o + 1 ) + ( r - o ) );
		for ( int i = o + 1; i <= r; i ++ ) {
			swap( ss[ i ], ss[ i - 1 ] );
		} 
	}
	if ( ~g ) {
		for ( int i = g - 1; i >= o; i -- ) {
			swap( ss[ i ], ss[ i + 1 ] );
		} 
		mnn = min( mnn, f( o + 1 ) + ( g - o ) );
		for ( int i = o + 1; i <= g; i ++ ) {
			swap( ss[ i ], ss[ i - 1 ] );
		} 
	}
	if ( ~y ) {
		for ( int i = y - 1; i >= o; i -- ) {
			swap( ss[ i ], ss[ i + 1 ] );
		} 
		mnn = min( mnn, f( o + 1 ) + ( y - o ) );
		for ( int i = o + 1; i <= y; i ++ ) {
			swap( ss[ i ], ss[ i - 1 ] );
		} 
	}
	return mnn;
}

main () {
	cin >> n;
	cin >> s;
	ss = s;
	ans = f(0);
	if ( ans == oo )
		cout << -1;
	else
		cout << ans;
}

Compilation message (stderr)

joi2019_ho_t3.cpp: In function 'long long int f(long long int)':
joi2019_ho_t3.cpp:50:9: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   50 |  if ( o == s.size() )
      |       ~~^~~~~~~~~~~
joi2019_ho_t3.cpp:55:21: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   55 |  for ( int i = o; i < s.size(); i ++ ) {
      |                   ~~^~~~~~~~~~
joi2019_ho_t3.cpp: At global scope:
joi2019_ho_t3.cpp:100:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  100 | main () {
      | ^~~~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 55
• Subtask 3: 15 / 15
• Subtask 4: 0 / 25