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Submission #335310

# Submission time Handle Problem Language Result Execution time Memory
335310 2020-12-11T22:49:22 Z CaroLinda Trobojnica (COCI19_trobojnica) C++14
110 / 110
 76 ms 8408 KB 
#include <bits/stdc++.h>

using namespace std ;

int N ;
int freq[3] ;

int main()
{
	scanf("%d", &N) ;

	vector<int> color(N) , nxt(N) , prev(N) ;

	for(int i = 0 ; i < N ; i++ )
	{
		char c ;
		scanf(" %c", &c ) ; 

		color[i] = c-'1' ;
		freq[ color[i] ]++ ;

		nxt[i] = (i == N-1) ? 0 : (i+1) ;
		prev[ nxt[i] ] = i ;
	}

	for(int i = 0 ; i < 3 ; i++ )
		if(freq[i] > N-2 || (N-2-freq[i])&1 )
		{
			printf("NE\n") ;
			return 0 ;
		}
	
	printf("DA\n") ;

	vector< tuple<int,int,int> > ans ;

	int cur = 1 ;

	while(N > 3 )
	{
		int mostFrequent = (freq[0] > freq[1] ) ? 0 : 1 ;
		mostFrequent = (freq[mostFrequent] > freq[2] ) ? mostFrequent : 2 ;

		if( color[cur] != color[ nxt[cur] ] && (color[cur] == mostFrequent || color[nxt[cur] ] == mostFrequent) )
		{
//			printf("%d %d %d %d %d\n", cur, nxt[cur], nxt[nxt[cur] ] , color[cur] , color[nxt[cur] ] ) ;

			freq[ color[cur] ]-- ;
			freq[ color[nxt[cur] ] ]-- ;

			color[cur] = 3 - color[cur] - color[ nxt[cur] ] ;
			nxt[cur] = nxt[ nxt[cur] ] ;
			prev[ nxt[cur] ] = cur ;

			ans.push_back( make_tuple(cur, nxt[cur] , color[cur] ) ) ;

			freq[color[cur] ]++ ;
			cur = prev[cur] ;
			N-- ;
		}
		else cur = nxt[cur] ;

	}

	for(auto e : ans ) printf("%d %d %d\n", get<0>(e)+1 , get<1>(e)+1, get<2>(e)+1 ) ;

}

Compilation message

trobojnica.cpp: In function 'int main()':
trobojnica.cpp:10:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   10 |  scanf("%d", &N) ;
      |  ~~~~~^~~~~~~~~~
trobojnica.cpp:17:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   17 |   scanf(" %c", &c ) ;
      |   ~~~~~^~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 0 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 0 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 0 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 0 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct

Subtask #3
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 0 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 0 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 0 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 75 ms 8152 KB Output is correct
22 Correct 73 ms 7512 KB Output is correct
23 Correct 1 ms 364 KB Output is correct
24 Correct 1 ms 364 KB Output is correct
25 Correct 76 ms 8408 KB Output is correct
26 Correct 1 ms 364 KB Output is correct
27 Correct 38 ms 4316 KB Output is correct
28 Correct 15 ms 2796 KB Output is correct
29 Correct 1 ms 364 KB Output is correct
30 Correct 15 ms 2924 KB Output is correct