oj.uz

Submission #48766

# Submission time Handle Problem Language Result Execution time Memory
48766 2018-05-18T16:33:43 Z leejseo 구간 성분 (KOI15_interval) C++17
100 / 100
 969 ms 34028 KB 
#include <bits/stdc++.h>
 
using namespace std;
typedef pair<int, int> pii;
typedef pair<pii, int> tri;
 
char A[1505], B[1505];
int N, M, va[1505], vb[1505], cha[27][1505], chb[27][1505], sa[1505], sb[1505], ans = 0, hsh[27];
vector<tri> inb;
vector<pii> inb_v;
 
int ub(pii val){
	int count = inb_v.size();
	int first = 0;
	while (count > 0){
		int step = count / 2;
		int mid = first + step;
		if (!(val < inb_v[mid])) first = ++mid, count -= step + 1;
		else count = step;
	}
	return first;
}
 
int lb(pii val){
	int count = inb_v.size();
	int first = 0;
	while (count > 0){
		int step = count / 2;
		int mid = first + step;
		if (inb_v[mid] < val) first = ++mid, count -= step + 1;
		else count = step;
	}
	return first;
}
 
int main(void){
	hsh[0] = 987654337;
	scanf("%s", A);
	scanf("%s", B);
	N = strlen(A), M = strlen(B);
	for (int i=1; i<27; i++) hsh[i] = hsh[i-1] * hsh[0];
	for (int i=0; i<N; i++){
		va[i] = A[i] - 96;
		for (int c=1; c<27; c++) cha[c][i+1] = cha[c][i];
		cha[va[i]][i+1]++;
		va[i] = hsh[va[i]];
		sa[i+1] = sa[i] + va[i];
	}
	for (int i=0; i<M; i++) {
		vb[i] = B[i] - 96;
		for (int c=1; c<27; c++) chb[c][i+1] = chb[c][i];
		chb[vb[i]][i+1]++;
		vb[i] = hsh[vb[i]];
		sb[i+1] = sb[i] + vb[i];
	}
	for (int k=0; k<M; k++){
		for (int i=0; i<M-k; i++){
			inb.push_back(tri(pii(sb[i+k+1] - sb[i], k), i));
			inb_v.push_back(pii(sb[i+k+1] - sb[i], k));
		}
	}	
	sort(inb.begin(), inb.end());
	sort(inb_v.begin(), inb_v.end());
	for (int k=0; k<N; k++){
		for (int i=0; i<N-k; i++){
			if (ans == k+1) break;
			int val = sa[i+k+1] - sa[i];
			int st = lb(pii(val, k)), ed = ub(pii(val, k));
			for (int j=st; j<ed; j++){
				if (k+1 == ans) break;
				int nv, nk = (inb[j].first).first, ni = inb[j].second;
				bool b = true;
				for (int c=1; c<27; c++){
					if (cha[c][i+k+1] - cha[c][i] != chb[c][ni+k+1] - chb[c][ni]){
						b = false;
						break;
					}
				}
				if (b) ans = max(ans, k+1);
			}
		}
	}
	printf("%d\n", ans);
}

Compilation message

interval.cpp: In function 'int main()':
interval.cpp:71:9: warning: unused variable 'nv' [-Wunused-variable]
     int nv, nk = (inb[j].first).first, ni = inb[j].second;
         ^~
interval.cpp:71:13: warning: unused variable 'nk' [-Wunused-variable]
     int nv, nk = (inb[j].first).first, ni = inb[j].second;
             ^~
interval.cpp:38:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%s", A);
  ~~~~~^~~~~~~~~
interval.cpp:39:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%s", B);
  ~~~~~^~~~~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 2 ms 616 KB Output is correct
3 Correct 4 ms 940 KB Output is correct
4 Correct 4 ms 940 KB Output is correct
5 Correct 5 ms 940 KB Output is correct

Subtask #2
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 55 ms 3488 KB Output is correct
2 Correct 47 ms 3488 KB Output is correct
3 Correct 29 ms 3600 KB Output is correct
4 Correct 18 ms 3600 KB Output is correct
5 Correct 66 ms 3676 KB Output is correct

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 323 ms 10864 KB Output is correct
2 Correct 362 ms 10864 KB Output is correct
3 Correct 349 ms 10864 KB Output is correct
4 Correct 348 ms 10864 KB Output is correct
5 Correct 345 ms 10944 KB Output is correct
6 Correct 357 ms 10944 KB Output is correct
7 Correct 336 ms 10944 KB Output is correct
8 Correct 343 ms 10944 KB Output is correct
9 Correct 343 ms 10944 KB Output is correct
10 Correct 356 ms 10944 KB Output is correct

Subtask #4
39.0 / 39.0

# Verdict Execution time Memory Grader output
1 Correct 281 ms 17528 KB Output is correct
2 Correct 905 ms 34012 KB Output is correct
3 Correct 879 ms 34016 KB Output is correct
4 Correct 392 ms 34028 KB Output is correct
5 Correct 969 ms 34028 KB Output is correct