Submission #217371

#	Time	Username	Problem	Language	Result	Execution time	Memory
217371		kshitij_sodani	Growing Vegetable is Fun 3 (JOI19_ho_t3)	C++17	0 / 100	412 ms	755704 KiB

joi2019_ho_t3

#include <iostream>
#include <bits/stdc++.h>
using namespace std;
typedef long long int llo;
#define mp make_pair
#define pb push_back
#define a first
#define b second
#define endl "\n"
llo mod=1000000007;
int n;
int it[401];
int dp[401][401][401][3];
vector<int> aa;
vector<int> bb;
vector<int> cc;
int main(){
	ios_base::sync_with_stdio(0); cin.tie(0);
	cin>>n;
	char ss;
	int co=0;
	int co2=0;
	for(int i=0;i<n;i++){
		for(int j=0;j<=n;j++){
			for(int k=0;k<=n;k++){
				for(int l=0;l<3;l++){
					dp[i][j][k][l]=400000;
				}
			}
		}
	}
	int pre[n][3];
	for(int i=0;i<n;i++){
		if(i==0){
			pre[i][0]=0;
			pre[i][1]=0;
			pre[i][2]=0;
		}
		else{
			pre[i][0]=pre[i-1][0];
			pre[i][1]=pre[i-1][1];
			pre[i][2]=pre[i-1][2];
		}
		cin>>ss;
		if(ss=='R'){
			co+=1;
			aa.pb(i);
			pre[i][0]+=1;
		}
		else if(ss=='G'){
			it[i]=1;
			co2+=1;
			pre[i][1]+=1;
			bb.pb(i);
		}
		else{
			pre[i][2]+=1;
			cc.pb(i);
		}
	}
	if(co>(n+1)/2 or co2>(n+1)/2 or (n-co-co2)>(n+1)/2){
		cout<<-1<<endl;
		return 0;
	}
	for(int i=0;i<n;i++){
		for(int j=0;j<=min((int)aa.size(),i+1);j++){
			for(int k=0;k<=min((int)aa.size(),i+1-j);k++){
				if((i+1)-j-k>(i+2)/2 or j>(i+2)/2 or k>(i+2)/2 or j+k>i+1 or j>aa.size() or k>bb.size() or i+1-j-k>cc.size()){
					continue;
				}
			//	cout<<i+1<<" "<<j<<" "<<k<<endl;
				if(j>0){
					int co=0;
					if(k>0){
						co+=max(pre[bb[k-1]][1]-pre[aa[j-1]][1],0);
					}
					if(i+1-j-k>0){
						co+=max(pre[cc[i-j-k]][2]-pre[aa[j-1]][2],0);
					}
					if(i>0){
						dp[i][j][k][0]=co+min(dp[i-1][j-1][k][1],dp[i-1][j-1][k][2]);
					}
					else{
						dp[i][j][k][0]=co;
					}
				}
				if(k>0){
					int co=0;
					if(j>0){
						co+=max(pre[aa[j-1]][0]-pre[bb[k-1]][0],0);
					}
					if(i+1-j-k>0){
						co+=max(pre[cc[i-j-k]][2]-pre[bb[k-1]][2],0);
					}
					if(i>0){
						dp[i][j][k][1]=co+min(dp[i-1][j][k-1][0],dp[i-1][j][k-1][2]);
					}
					else{
						dp[i][j][k][1]=co;
					}
				}
				if(j+k<i+1){
					int co=0;
					if(k>0){
						co+=max(pre[bb[k-1]][1]-pre[cc[i-j-k]][1],0);
					}
					if(j>0){
						co+=max(pre[aa[j-1]][0]-pre[cc[i-j-k]][0],0);
					}
					if(i>0){
						dp[i][j][k][2]=co+min(dp[i-1][j][k][0],dp[i-1][j][k][1]);
					}
					else{
						dp[i][j][k][2]=co;
					}
				}


			}
		}
	}
	int mi=400000;
	for(int j=0;j<=3;j++){
			mi=min(mi,dp[n-1][aa.size()][bb.size()][j]);
	}

	cout<<mi<<endl;
 
	return 0;
}

Compilation message (stderr)

joi2019_ho_t3.cpp: In function 'int main()':
joi2019_ho_t3.cpp:68:67: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if((i+1)-j-k>(i+2)/2 or j>(i+2)/2 or k>(i+2)/2 or j+k>i+1 or j>aa.size() or k>bb.size() or i+1-j-k>cc.size()){
                                                                  ~^~~~~~~~~~
joi2019_ho_t3.cpp:68:82: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if((i+1)-j-k>(i+2)/2 or j>(i+2)/2 or k>(i+2)/2 or j+k>i+1 or j>aa.size() or k>bb.size() or i+1-j-k>cc.size()){
                                                                                 ~^~~~~~~~~~
joi2019_ho_t3.cpp:68:103: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if((i+1)-j-k>(i+2)/2 or j>(i+2)/2 or k>(i+2)/2 or j+k>i+1 or j>aa.size() or k>bb.size() or i+1-j-k>cc.size()){
                                                                                                ~~~~~~~^~~~~~~~~~

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