제출 #543310

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
543310		balbit	Monochrome Points (JOI20_monochrome)	C++14	0 / 100	1 ms	212 KiB

monochrome

#include <bits/stdc++.h>
#define int ll
using namespace std;
#define ll long long
#define y1 zck_is_king
#define pii pair<ll, ll>
#define ull unsigned ll
#define f first
#define s second
#define ALL(x) x.begin(),x.end()
#define SZ(x) (int)x.size()
#define SQ(x) (x)*(x)
#define MN(a,b) a = min(a,(__typeof__(a))(b))
#define MX(a,b) a = max(a,(__typeof__(a))(b))
#define pb push_back
#define REP(i,n) for (int i = 0; i<n; ++i)
#define RREP(i,n) for (int i = n-1; i>=0; --i)
#define REP1(i,n) for (int i = 1; i<=n; ++i)
#define SORT_UNIQUE(c) (sort(c.begin(),c.end()), c.resize(distance(c.begin(),unique(c.begin(),c.end()))))
#ifdef BALBIT
#define IOS()
#define bug(...) fprintf(stderr,"#%d (%s) = ",__LINE__,#__VA_ARGS__),_do(__VA_ARGS__);
template<typename T> void _do(T &&x){cerr<<x<<endl;}
template<typename T, typename ...S> void _do(T &&x, S &&...y){cerr<<x<<", ";_do(y...);}
#else
#define IOS() ios_base::sync_with_stdio(0);cin.tie(0);
#define endl '\n'
#define bug(...)
#endif

const int iinf = 1e9+10;
const ll inf = 1ll<<60;
const ll mod = 1e9+7 ;


void GG(){cout<<"0\n"; exit(0);}

ll mpow(ll a, ll n, ll mo = mod){ // a^n % mod
    ll re=1;
    while (n>0){
        if (n&1) re = re*a %mo;
        a = a*a %mo;
        n>>=1;
    }
    return re;
}

ll inv (ll b, ll mo = mod){
    if (b==1) return b;
    return (mo-mo/b) * inv(mo%b,mo) % mo;
}

const int maxn = 1e5+5;

int totb=0, totw=0;

char a[maxn];

signed main(){
    IOS();

    int n; cin>>n; n*=2;
    REP(i,n) {
        cin>>a[i];
    }

    int hb=0, hw=0;
    ll re = 0;

    vector<int> v;

    REP(i,n) {
        (a[i] == 'B'?totb:totw) ++;
        if (a[i] == 'B') {
            if ((n/2 - totw) >= hb+1) {
                v.pb(0);
                ++hb;
            }else{
                auto it = find(ALL(v), 1);
                re += v.end() - it - 1;
                v.erase(it);
                hw--;
            }
        }else{
            if ((n/2 - totb) >= hw+1) {
                v.pb(1);
                ++hw;
            }else{
                auto it = find(ALL(v), 0);
                re += v.end() - it - 1;
                v.erase(it);
                hb--;
            }
        }
    }

    cout<<re<<endl;


}

• Subtask 1: 0 / 4
• Subtask 2: 0 / 21
• Subtask 3: 0 / 10
• Subtask 4: 0 / 65