Submission #497418

#	Time	Username	Problem	Language	Result	Execution time	Memory
497418		Nuraly_Serikbay	Growing Vegetable is Fun 3 (JOI19_ho_t3)	C++14	15 / 100	1 ms	332 KiB

joi2019_ho_t3

#include <bits/stdc++.h>
  
#define endl "\n"
#define mp make_pair
#define pb push_back
#define F first
#define S second
#define sz size()
#define rep(i,k,n) for(int i = k ; i <= n ; ++i)
#define per(i,k,n) for(int i = k ; i >= n ; --i)
#define Zymraq() ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0)
#define all(x) x.begin(),x.end()
#define fr(x) freopen(x".in","r",stdin),freopen(x".out","w",stdout)
#define toqta return 0
#define PERMUTE next_permutation
#define no cout<<"No"<<endl;
#define yes cout<<"Yes"<<endl;
#define a() a + 1, a + n + 1  

using namespace std;
 
#pragma GCC optimize("inline")
#pragma GCC optimize("-fgcse,-fgcse-lm")
#pragma GCC optimize("-ftree-pre,-ftree-vrp")
#pragma GCC optimize("-ffast-math")
#pragma GCC optimize("-fipa-sra")
#pragma GCC optimize("-fpeephole2")
#pragma GCC optimize("-fsched-spec")
#pragma GCC optimize("Ofast,no-stack-protector")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
#pragma GCC optimize("unroll-loops")
   
typedef long long ll;
typedef unsigned long long ull;
typedef string S;
typedef double ld;
typedef long double lld;
  
const int N = 1e6 + 17;
const int modd = 1e9 + 7;
const ll INF = 1e18 - 19;
const int P = 37;
const ll NN = 1e7 + 17;
const ld eps = 1e-19;
const double pi = 3.141592653589793238462643383279 ;
   
 
bool sortbysec(const pair<int,int> &a, const pair<int,int> &b){
    return (a.second < b.second);
}
 
void pre (ll a) {
    cout << fixed << setprecision(a);
    return;
}


ll n, a[N];
ll r, g;
string s;
vector <char> b;

inline void Solution () {
	cin >> n;
	cin >> s;
	for (int i = 0; i < s.size(); ++ i) {
		if (s[i] == 'R') r ++;
		else g ++;
		b.pb (s[i]);
	}
	if (abs (r - g) > 1) {
		cout << -1;
		return;
	}
	vector <char> odd;
	vector <char> even;
	for (int i = 0; i < s.size(); ++ i) {
		if ((i + 1) % 2 != 0) {
			odd.pb ('R');
			even.pb ('G');
		} else {
			odd.pb ('G');
			even.pb ('R');
		}
	}
	ll mx = 0, cnt = 0;
	for (int i = 0; i < odd.size(); ++ i) {
		if (odd[i] != b[i]) {
			if (i + 1 == odd.size()) {
				cnt = INF;
				break;
			}
			ll pr = b[i];
			for (int j = i + 1; j < odd.size(); ++ j) {
				if (b[j] == odd[i]) {
					cnt += j - i;
					b[i] = b[j];
					b[j] = pr;
					break;
				}	
			}
		}
	}
	mx = max (mx, cnt);
	cnt = 0;
	for (int i = 0; i < even.size(); ++ i) {
		if (even[i] != s[i]) {
			if (i + 1 == even.size()) {
				cnt = INF;
				break;
			}
			ll pr = s[i];
			for (int j = i + 1; j < even.size(); ++ j) {
				if (s[j] == even[i]) {
					cnt += j - i;
					s[i] = s[j];
					s[j] = pr;
					break;
				}		
			}
		}
	}
	mx = min (mx, cnt);
	if (mx == INF) mx = -1;
	cout << mx;
	return;
}    
 
 
int main () {
	Zymraq();
	Solution ();
	exit (0);
}

Compilation message (stderr)

joi2019_ho_t3.cpp: In function 'void Solution()':
joi2019_ho_t3.cpp:66:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   66 |  for (int i = 0; i < s.size(); ++ i) {
      |                  ~~^~~~~~~~~~
joi2019_ho_t3.cpp:77:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   77 |  for (int i = 0; i < s.size(); ++ i) {
      |                  ~~^~~~~~~~~~
joi2019_ho_t3.cpp:87:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   87 |  for (int i = 0; i < odd.size(); ++ i) {
      |                  ~~^~~~~~~~~~~~
joi2019_ho_t3.cpp:89:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   89 |    if (i + 1 == odd.size()) {
      |        ~~~~~~^~~~~~~~~~~~~
joi2019_ho_t3.cpp:94:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   94 |    for (int j = i + 1; j < odd.size(); ++ j) {
      |                        ~~^~~~~~~~~~~~
joi2019_ho_t3.cpp:106:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  106 |  for (int i = 0; i < even.size(); ++ i) {
      |                  ~~^~~~~~~~~~~~~
joi2019_ho_t3.cpp:108:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  108 |    if (i + 1 == even.size()) {
      |        ~~~~~~^~~~~~~~~~~~~~
joi2019_ho_t3.cpp:113:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  113 |    for (int j = i + 1; j < even.size(); ++ j) {
      |                        ~~^~~~~~~~~~~~~

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