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Submission #223193

# Submission time Handle Problem Language Result Execution time Memory
223193 2020-04-15T04:52:28 Z jamielim Trener (COCI20_trener) C++14
22 / 110
 23 ms 640 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];
	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 256 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 384 KB Output is correct

Subtask #2
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 640 KB Output is correct
2 Correct 20 ms 640 KB Output is correct
3 Correct 20 ms 640 KB Output is correct
4 Incorrect 19 ms 640 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #3
0 / 55.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 256 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 384 KB Output is correct
5 Correct 23 ms 640 KB Output is correct
6 Correct 20 ms 640 KB Output is correct
7 Correct 20 ms 640 KB Output is correct
8 Incorrect 19 ms 640 KB Output isn't correct
9 Halted 0 ms 0 KB -