Submission #701384

#	Time	Username	Problem	Language	Result	Execution time	Memory
701384		Baytoro	Growing Vegetable is Fun 3 (JOI19_ho_t3)	C++17	100 / 100	63 ms	163048 KiB

joi2019_ho_t3

#include <bits/stdc++.h>
using namespace std;
#define ios ios::sync_with_stdio(false); cin.tie(NULL);cout.tie(NULL);
#define pb push_back
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define fr first
#define sc second
#define endl '\n'
//#define int long long
#define ll long long
void fopn(string name){
	freopen((name+".in").c_str(),"r",stdin);
	freopen((name+".out").c_str(),"w",stdout);
}
const ll INF=1e18,mod=1e9+7;
const int N=405;
vector<int> r,g,y;
int p[N][3],dp[N][N][N][3];
void solve(){
	int n;cin>>n;
	string s;cin>>s;
	for(int i=0;i<n;i++){
		if(s[i]=='R') r.pb(i+1);
		if(s[i]=='G') g.pb(i+1);
		if(s[i]=='Y') y.pb(i+1);
		p[i+1][0]=r.size();
		p[i+1][1]=g.size();
		p[i+1][2]=y.size();
	}
	for(int i=0;i<=(int)r.size();i++){
		for(int j=0;j<=(int)g.size();j++){
			for(int k=0;k<=(int)y.size();k++){
				if(!i && !j && !k) continue;
				for(int l=0;l<3;l++) dp[i][j][k][l]=mod;
				int sum=i+j+k;
				if(i) dp[i][j][k][0]=min(dp[i-1][j][k][1],dp[i-1][j][k][2])+((r[i-1]+max(0,j-p[r[i-1]][1])+max(0,k-p[r[i-1]][2]))-sum);
				if(j) dp[i][j][k][1]=min(dp[i][j-1][k][0],dp[i][j-1][k][2])+((g[j-1]+max(0,i-p[g[j-1]][0])+max(0,k-p[g[j-1]][2]))-sum);
				if(k) dp[i][j][k][2]=min(dp[i][j][k-1][0],dp[i][j][k-1][1])+((y[k-1]+max(0,i-p[y[k-1]][0])+max(0,j-p[y[k-1]][1]))-sum);
			}
		}
	}
	int ans=*min_element(dp[r.size()][g.size()][y.size()],dp[r.size()][g.size()][y.size()]+3);
	if(ans>=mod) ans=-1;
	cout<<ans;
}
main(){
	ios;
	int T=1;
	//cin>>T;
	while(T--){
		solve();
	}
}

Compilation message (stderr)

joi2019_ho_t3.cpp:47:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   47 | main(){
      | ^~~~
joi2019_ho_t3.cpp: In function 'void fopn(std::string)':
joi2019_ho_t3.cpp:13:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |  freopen((name+".in").c_str(),"r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
joi2019_ho_t3.cpp:14:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |  freopen((name+".out").c_str(),"w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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