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Submission #223195

# Submission time Handle Problem Language Result Execution time Memory
223195 2020-04-15T04:53:58 Z jamielim Trener (COCI20_trener) C++14
55 / 110
 2000 ms 6912 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
const ll MOD=1000000007;

int main(){
	int n,k;
	scanf("%d%d",&n,&k);
	char str[n][k][55];
	for(int i=0;i<n;i++){
		for(int j=0;j<k;j++){
			scanf("%s",str[i][j]);
		}
	}
	ll dp[n][k]; memset(dp,0,sizeof(dp));
	for(int i=0;i<k;i++)dp[n-1][i]=1;
	for(int i=n-2;i>=0;i--){
		for(int j=0;j<k;j++){
			for(int m=0;m<k;m++){
				bool f=1,s=1;
				for(int l=0;l<=i;l++){
					if(str[i][j][l]!=str[i+1][m][l])f=0;
					if(str[i][j][l]!=str[i+1][m][l+1])s=0;
				}
				if(f||s)dp[i][j]+=dp[i+1][m];
				dp[i][j]%=MOD;
			}
		}
	}
	ll ans=0;
	for(int i=0;i<k;i++){ans+=dp[0][i];ans%=MOD;}
	printf("%lld",ans);
}

Compilation message

trener.cpp: In function 'int main()':
trener.cpp:9:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&k);
  ~~~~~^~~~~~~~~~~~~~
trener.cpp:13:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%s",str[i][j]);
    ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 256 KB Output is correct
3 Correct 5 ms 256 KB Output is correct
4 Correct 5 ms 256 KB Output is correct

Subtask #2
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 640 KB Output is correct
2 Correct 19 ms 640 KB Output is correct
3 Correct 19 ms 640 KB Output is correct
4 Correct 21 ms 640 KB Output is correct
5 Correct 19 ms 768 KB Output is correct
6 Correct 19 ms 768 KB Output is correct
7 Correct 20 ms 768 KB Output is correct

Subtask #3
0 / 55.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 256 KB Output is correct
3 Correct 5 ms 256 KB Output is correct
4 Correct 5 ms 256 KB Output is correct
5 Correct 20 ms 640 KB Output is correct
6 Correct 19 ms 640 KB Output is correct
7 Correct 19 ms 640 KB Output is correct
8 Correct 21 ms 640 KB Output is correct
9 Correct 19 ms 768 KB Output is correct
10 Correct 19 ms 768 KB Output is correct
11 Correct 20 ms 768 KB Output is correct
12 Execution timed out 2085 ms 6912 KB Time limit exceeded
13 Halted 0 ms 0 KB -