Submission #210004

#	Time	Username	Problem	Language	Result	Execution time	Memory
210004		kshitij_sodani	Dango Maker (JOI18_dango_maker)	C++17	100 / 100	498 ms	44536 KiB

dango_maker

#include <iostream>
#include <bits/stdc++.h>
using namespace std;
#define mp make_pair
#define pb push_back
typedef int64_t llo;
#define a first
#define  b second
#define endl "\n"
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	int n,m;
	cin>>n>>m;
	int it[n][m];
	char s;
	for(int i=0;i<n;i++){
		for(int j=0;j<m;j++){
			cin>>s;
			if(s=='R'){
				it[i][j]=0;
			}
			else if(s=='G'){
				it[i][j]=1;
			}
			else{
				it[i][j]=2;
			}
		}
	}
	int tot=0;
	for(int ii=0;ii<n+m-1;ii++){
		
		vector<pair<int,int>> aa;
		for(int jj=0;jj<ii+1;jj++){

			int i,j;
			j=jj;
			i=ii-j;
			int co=0;
			int co2=0;
			if(i>=n or j>=m){
				continue;
			}
			int st=1;
			int stt=1;
			if(j>0  and it[i][j-1]==0 and j+1<m and it[i][j+1]==2 and it[i][j]==1){
				co+=1;
			}
		
			if(i>0 and i+1<n and it[i-1][j]==0 and it[i+1][j]==2 and it[i][j]==1){
				co2+=1;
			}
			aa.pb({co,co2});
		}
		pair<int,int> dp[aa.size()];
		dp[0]=aa[0];
		for(int k=1;k<aa.size();k++){
			dp[k]=dp[k-1];
			if(aa[k].a==1){
				dp[k].a+=1;
				if(k>1){
					dp[k].a=max(dp[k].a,dp[k-2].b+1);
				}

			}
			if(aa[k].b==1){
				dp[k].b+=1;
				if(k>1){
					dp[k].b=max(dp[k].b,dp[k-2].a+1);
				}
				
			}

		}
		tot+=max(dp[aa.size()-1].a,dp[aa.size()-1].b);
		

	}

	cout<<tot<<endl;






	return 0;
}

Compilation message (stderr)

dango_maker.cpp: In function 'int main()':
dango_maker.cpp:45:8: warning: unused variable 'st' [-Wunused-variable]
    int st=1;
        ^~
dango_maker.cpp:46:8: warning: unused variable 'stt' [-Wunused-variable]
    int stt=1;
        ^~~
dango_maker.cpp:58:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int k=1;k<aa.size();k++){
               ~^~~~~~~~~~

• Subtask 1: 13 / 13
• Subtask 2: 20 / 20
• Subtask 3: 67 / 67