Submission #38441

#	Time	Username	Problem	Language	Result	Execution time	Memory
38441		kajebiii	구간 성분 (KOI15_interval)	C++14	100 / 100	256 ms	2156 KiB

interval

#include <bits/stdc++.h>

using namespace std;

#define SZ(v) ((int)(v).size())
#define ALL(v) (v).begin(),(v).end()
#define one first
#define two second
typedef long long ll;
typedef pair<int, int> pi;
const int INF = 0x3f2f1f0f;
const ll LINF = 1ll * INF * INF;

const int MAX_N = 2e3 + 10;

typedef unsigned int ui;

int N, M; char Ns[MAX_N], Ms[MAX_N];
ui H[26];
int main() {
	H[0] = 1e9 + 7;
	for(int i=1; i<26; i++) H[i] = H[i-1] * (ui)97 + (ui)(1e8 + 7);
	
	scanf("%s", Ns); N = strlen(Ns);
	scanf("%s", Ms); M = strlen(Ms);

	int ans = 0;
	for(int l=min(N, M); l>=1; l--) {
		ui n = 0, m = 0;
		for(int i=0; i<l-1; i++) n += H[Ns[i]-'a'], m += H[Ms[i]-'a'];
		set<ui> s;
		for(int i=l-1; i<N; i++) {
			n += H[Ns[i]-'a'];
			if(i-l>=0) n -= H[Ns[i-l]-'a'];
			s.insert(n);
		}
		for(int j=l-1; j<M; j++) {
			m += H[Ms[j]-'a'];
			if(j-l>=0) m -= H[Ms[j-l]-'a'];
			if(s.find(m) != s.end()) {
				ans = l;
				goto finish;
			}
		}
	}
finish:
	printf("%d\n", ans);
	return 0;
}

Compilation message (stderr)

interval.cpp: In function 'int main()':
interval.cpp:24:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%s", Ns); N = strlen(Ns);
                 ^
interval.cpp:25:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%s", Ms); M = strlen(Ms);
                 ^

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