Submission #958098

#	Time	Username	Problem	Language	Result	Execution time	Memory
958098		shadow_sami	Growing Vegetable is Fun 3 (JOI19_ho_t3)	C++17	100 / 100	360 ms	771840 KiB

joi2019_ho_t3

#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
using namespace std;
typedef int ll;
typedef vector<ll> vi;
typedef vector<vector<ll>> vvi;
typedef pair<ll,ll> pi;
typedef map<ll,ll> mi;
typedef long double ld;
typedef vector<ld> vd;
typedef vector<vector<ld>> vvd;
typedef pair<ld,ld> pd;
#define ff first
#define ss second
#define srt(a) sort(a.begin(),a.end());
#define fip(k, n) for (ll i = k; i < n; i++)
#define fjp(k, n) for (ll j = k; j < n; j++)
#define fin(k, n) for (ll i = k; i >= n; i--)
#define fjn(k, n) for (ll j = k; j >= n; j--)
#define fp(k, n, m) for (ll k = n; k < m; k++)
#define fn(k, n, m) for (ll k = n; k >= m; k--)
#define ordered_set tree<pi, null_type,less< pi >, rb_tree_tag,tree_order_statistics_node_update>
#define totalOne(n) __builtin_popcount(n)
#define backZero(n) __builtin_ctzll(n)
#define frontZero(n) __builtin_clzll(n)
#define fx(k) for ( auto x : k )
#define test ll t;cin >> t;while (t--)
#define nli "\n"

// ==========================(debug)============================================================================================== //

#ifndef ONLINE_JUDGE
#define debug(x) cerr << #x <<" "; _printn(x); cerr << nli;
#else
#define debug(x)
#endif

void _printn(ll x){ cerr<<x<<" "; }
// void _printn(int x){ cerr<<x<<" "; }
void _printn(ld x){ cerr<<x<<" "; }
void _printn(double x){ cerr<<x<<" "; }
void _printn(string x){ cerr<<x<<" "; }
void _printn(char x){ cerr<<x<<" "; }
void _printn(bool x){ cerr<<x<<" "; }
template<class T,class V>void _printn(pair<T,V> vv);
template<class T> void _printn(vector<T> vv);
template<class T> void _printn(set<T> vv);
template<class T,class V> void _printn(map<T,V> vv);
template<class T> void _printn(multiset<T> vv);
template<class T,class V>void _printn(pair<T,V> vv){ cerr<<"( ";_printn(vv.ff);cerr<<",";_printn(vv.ss);cerr<<")";}
template<class T> void _printn(vector<T> vv){ cerr<<"[ "; for(auto xx:vv){ _printn(xx);cerr<<" "; } cerr<<"]"; };
template<class T> void _printn(set<T> vv){ cerr<<"{ "; for(auto xx:vv){ _printn(xx);cerr<<" "; } cerr<<"}"; };
template<class T> void _printn(multiset<T> vv){ cerr<<"{ "; for(auto xx:vv){ _printn(xx);cerr<<" "; } cerr<<"}"; };
template<class T,class V> void _printn(map<T,V> vv){ cerr<<"{ "; for(auto xx:vv){ _printn(xx);cerr<<" "; } cerr<<"}"; };

// ==========================(debug)============================================================================================== //

ll n,m,tp,tp2,res,cnt,sum,tptp,ans;
const ll mx = 400+5;
const ll mod = 1e9+7;

// // ==========================(MOD)=============================================================================================== //

// ll mod_add(ll aa,ll bb){ return ((aa%mod)+(bb%mod))%mod; }
// ll mod_minus(ll aa,ll bb){ return (((aa%mod)-(bb%mod))+10*mod)%mod; }
// ll mod_mul(ll aa,ll bb){ return ((aa%mod)*(bb%mod))%mod; }
// ll mod_power(ll aa,ll bb){ aa%=mod; ll empowered = 1; bb%=mod-1; while(bb > 0){ if(bb & 1) empowered = mod_mul(empowered,aa); bb = bb >> 1; aa = mod_mul(aa,aa); } return empowered; }
// ll mod_divi(ll aa,ll bb){ aa=mod_mul(aa,mod_power(bb,mod-2)); return aa; }

// // ==========================(MOD)=============================================================================================== //

bool f = false;
string s;
ll tnc[mx];
ll a[mx];
ll pref[mx][3];
ll to[mx][3];
ll dp[mx][mx][mx][3];

int main(){
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    // #ifndef ONLINE_JUDGE
    //     freopen("input1.txt", "r", stdin);
    //     freopen("output1.txt", "w", stdout);
    //     freopen("error1.txt", "w", stderr);
    // #endif // ONLINE_JUDGE

        cin>>n;
        cin>>s;
        fip(0,n){
            if(s[i]=='R')
                a[i] = 0;
            else if(s[i]=='G')
                a[i] = 1;
            else
                a[i] = 2;
        }
        fip(0,n+2)
            fjp(0,n+2)
                fp(k,0,n+2)
                    fp(t,0,3)
                        dp[i][j][k][t] = 1e9;
        fip(0,3)
            dp[0][0][0][i] = 0;
        fip(0,n){
            to[tnc[a[i]]][a[i]] = i;
            tnc[a[i]]++;
            fjp(0,3)
                pref[i][j] = tnc[j];
        }
        fip(0,tnc[0]+1)
            fjp(0,tnc[1]+1)
                fp(k,0,tnc[2]+1){
                    fp(t,0,3){
                        if(t!=0 && i<tnc[0])
                            dp[i+1][j][k][0] = min(dp[i+1][j][k][0] , dp[i][j][k][t] + max(0,pref[to[i][0]][1]-j) + max(0,pref[to[i][0]][2]-k)); 
                        if(t!=1 && j<tnc[1])
                            dp[i][j+1][k][1] = min(dp[i][j+1][k][1] , dp[i][j][k][t] + max(0,pref[to[j][1]][0]-i) + max(0,pref[to[j][1]][2]-k));
                        if(t!=2 && k<tnc[2])
                            dp[i][j][k+1][2] = min(dp[i][j][k+1][2] , dp[i][j][k][t] + max(0,pref[to[k][2]][0]-i) + max(0,pref[to[k][2]][1]-j));
                    }
                }
        ans = 1e9;
        fip(0,3)
            ans = min(ans,dp[tnc[0]][tnc[1]][tnc[2]][i]);
        if(ans==1e9)
            ans = -1;
        cout<<ans<<nli;
        
    cerr << "Time elapsed: " << setprecision(6) << 1000.0 * clock() / CLOCKS_PER_SEC << "ms\n";
    return 0;
}

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