oj.uz

답안 #732949

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
732949 2023-04-29T17:29:08 Z vjudge1 Trener (COCI20_trener) C++17
55 / 110
 80 ms 844 KB 
#include<bits/stdc++.h>
#define int long long
#define MOD 1000000007
#define all(x) x.begin(),x.end()
#define ff first
#define ss second
#define pb push_back
#define fast ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);

using namespace std;

const int p2=29;

int p[1505];

int add(int x,int y){
	return ((x+y)%MOD+MOD)%MOD;
}

int mul(int x,int y){
	return (x*y)%MOD;
}

int fp(int a,int b){
	if(b==0)return 1;
	int t=fp(a,b/2);
	t=(t*t)%MOD;
	if(b%2)return (t*a)%MOD;
	return t;
}

int32_t main(){
	srand(time(NULL));
	fast;
	p[0]=1;
	for(int i=1;i<=1500;i++)p[i]=mul(p[i-1],p2);
	int n,m;
	cin>>n>>m;
	map<int,int>mp;
	for(int i=0;i<n;i++){
		map<int,int>mp2;
		for(int j=0;j<m;j++){
			string s;
			cin>>s;
			int a=0;
			for(int k=0;k<s.size()-1;k++){
				a=add(a,mul(s[k]-'a'+1,p[k]));
			}
			int b;
			if(i!=0)b=add(mul(s.back()-'a'+1,p[i-1]),mul(fp(p2,MOD-2),add(a,-(s[0]-'a'+1))));
			int c=add(a,mul(s.back()-'a'+1,p[i]));
			if(i==0){
				mp2[c]++;
				mp2[c]%=MOD;
				continue;
			}
			mp2[c]=add(mp2[c],add(mp[a],mp[b]));
			if(a==b){
				mp2[c]=add(mp2[c],-mp[a]);
			}
		}
		mp.clear();
		mp=mp2;
	}
	int ans=0;
	for(auto i:mp)ans=add(ans,i.ss);
	cout<<ans<<endl;
}

Compilation message

trener.cpp: In function 'int32_t main()':
trener.cpp:46:17: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |    for(int k=0;k<s.size()-1;k++){
      |                ~^~~~~~~~~~~

Subtask #1
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 212 KB Output is correct

Subtask #2
33.0 / 33.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 468 KB Output is correct
2 Correct 5 ms 460 KB Output is correct
3 Correct 5 ms 468 KB Output is correct
4 Correct 3 ms 340 KB Output is correct
5 Correct 5 ms 468 KB Output is correct
6 Correct 4 ms 468 KB Output is correct
7 Correct 3 ms 340 KB Output is correct

Subtask #3
0 / 55.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 5 ms 468 KB Output is correct
6 Correct 5 ms 460 KB Output is correct
7 Correct 5 ms 468 KB Output is correct
8 Correct 3 ms 340 KB Output is correct
9 Correct 5 ms 468 KB Output is correct
10 Correct 4 ms 468 KB Output is correct
11 Correct 3 ms 340 KB Output is correct
12 Correct 80 ms 844 KB Output is correct
13 Correct 79 ms 808 KB Output is correct
14 Incorrect 78 ms 764 KB Output isn't correct
15 Halted 0 ms 0 KB -