Submission #497452

#	Time	Username	Problem	Language	Result	Execution time	Memory
497452		kingline	Growing Vegetable is Fun 3 (JOI19_ho_t3)	C++17	0 / 100	1 ms	204 KiB

joi2019_ho_t3

/*#pragma GCC optimize("O3")
#pragma GCC target ("avx2")
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#pragma GCC optimize("unroll-loops")*/
#include <bits/stdc++.h>
#pragma GCC optimize ("unroll-loops,Ofast,O3")
#pragma GCC target("avx,avx2,fma")
//#define file(data) freopen(data".in", "r", stdin); freopen(data".out", "w", stdout);
#define pb push_back
//#define ios ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define all(data) data.begin() , data.end()
#define endl '\n'
//freopen("nenokku_easy.in", "r", stdin);
//freopen("nenokku_easy.out", "w", stdout);
#define int long long
#define pii pair < int, int >
#define pll pair < long long, long long >

using namespace std;

typedef long long ll;
const int N = 1e6 + 5;
const int M = 350;
const int mod = 1e9 + 7;

int n, a[N];
char s[N];

main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    //file("pieaters");
    cin >> n;
    int r = 0, g = 0;
    for(int i = 1; i <= n; i++) {
        cin >> s[i];
        if(s[i] == 'R') ++r;
        else g++;
    }
    if(r > g) swap(r, g);
    if(g > r + 1) {
        cout << -1;
    } else {
        int ans = 0;
        for(int i = 2; i <= n; i++) {
            if(s[i] == s[i - 1]) {
                int j = i + 1;
                while(s[j] == s[i]) ++j;
                swap(s[j], s[i]);
                ans += j - i;
            }
        }
        cout << ans;
    }
}

/*
5 9 7
...##....
..#.##..#
..#....##
.##...#..
....#....
WS?EE??
*/

Compilation message (stderr)

joi2019_ho_t3.cpp:30:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   30 | main() {
      | ^~~~

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