Submission #453781

#	Time	Username	Problem	Language	Result	Execution time	Memory
453781		nickmet2004	구간 성분 (KOI15_interval)	C++11	0 / 100	28 ms	31388 KiB

interval

#include<bits/stdc++.h>
#define f first
#define s second
#define int long long
using namespace std;
const int N = 2005;
int A = 37;
int B = 1e9 + 9;
int C = 31;
int D = 1e9 + 7;
string s , t;
int pw1[27] , pw2[27];
vector<pair<int  ,int>> a[N] , b[N];
main (){
    ios_base::sync_with_stdio(0); cin.tie(0);
    cin >> s >> t;
    int n = s.size() , m = t.size();
    pw1[0] = pw2[0] = 1;
    for(int i = 1; i < 26; ++i) pw1[i] = pw1[i - 1] * A*(i + 1) % B;
    for(int i = 1; i< 26; ++i) pw2[i] = pw2[i - 1] * C*(i + 1) % D;
    for(int i = 0; i < n; ++i){
        int x= 0 , y =0;
        for(int j = i; j < n; ++j){
            x += pw1[s[j] - 'a'];
            y += pw2[s[j] - 'a'];
            if(x>=B)x-=B;
            if(y>=D)y-=D;
            a[j - i + 1].emplace_back(x , y);
        }
    }
    int ans = 0;
    for(int i = 0; i < m; ++i){
        int x= 0 , y =0;
        for(int j = i; j < m; ++j){
            x += pw1[t[j] - 'a'];
            y += pw2[t[j] - 'a'];
            if(x>=B)x-=B;
            if(y>=D)y-=D;
            b[j - i + 1].emplace_back(x , y);
        }
    }
    for(int i = min(n , m); ~i;--i){
        sort(a[i].begin() , a[i].end());
        sort(b[i].begin() , b[i].end());
        int k = 0;
        for(int j = 0; a[i].size(); ++j){
            while(a[i][j] > b[i][k])++k;
            if(a[i][j] == b[i][k]){cout << i;return 0;}
        }
    }

cout << 0;

}

Compilation message (stderr)

interval.cpp:14:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   14 | main (){
      | ^~~~
interval.cpp: In function 'int main()':
interval.cpp:31:9: warning: unused variable 'ans' [-Wunused-variable]
   31 |     int ans = 0;
      |         ^~~

• Subtask 1: 0 / 7
• Subtask 2: 0 / 23
• Subtask 3: 0 / 31
• Subtask 4: 0 / 39