Submission #71128

#	Time	Username	Problem	Language	Result	Execution time	Memory
71128		3zp	구간 성분 (KOI15_interval)	C++14	61 / 100	1084 ms	46500 KiB

interval

#include<bits/stdc++.h>
using namespace std;
int A = 987654323;
int B = 1e9 + 9;
int C = 985201597;
int D = 660353359;
int pol1[26];
int pol2[26];
set<pair<int,int> > sa[1509];
main(){
    pol1[0] = 1;
    for(int i = 1; i < 26; i ++)
        pol1[i] = (long long)pol1[i - 1] * (long long)A % B;
    pol2[0] = 1;
    for(int i = 1; i < 26; i ++)
        pol2[i] = (long long)pol2[i - 1] * (long long)C % D;
    int n, m;
    string a, b;
    cin >> a >> b;
    n = a.size(), m = b.size();
    for(int i = 0; i < n; i++){
        int H1 = 0, H2 = 0;
        for(int j = i; j < n; j++){
            H1 += pol1[a[j] - 'a'];
            H2 += pol2[a[j] - 'a'];
            if(H1 >= B) H1 -= B;
            if(H2 >= D) H2 -= D;
            sa[j - i + 1].insert({H1,H2});
        }
    }
    int ans = 0;
     for(int i = 0; i < m; i++){
        int H1 = 0, H2 = 0;
        for(int j = i; j < m; j++){
            H1 += pol1[b[j] - 'a'];
            H2 += pol2[b[j] - 'a'];
            if(H1 >= B) H1 -= B;
            if(H2 >= D) H2 -= D;
            if(sa[j - i + 1].find({H1,H2}) != sa[j - i + 1].end()){
                ans = max(ans, j - i + 1);
            }
        }
    }
    cout << ans << endl;


}

Compilation message (stderr)

interval.cpp:10:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^

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