Submission #223193

#	Time	Username	Problem	Language	Result	Execution time	Memory
223193		jamielim	Trener (COCI20_trener)	C++14	22 / 110	23 ms	640 KiB

trener

#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 (stderr)

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 / 22
• Subtask 2: 0 / 33
• Subtask 3: 0 / 55