Submission #982659


Source Code Expand

#include <iostream>
#include <cstdio>
#include <vector>
#include <algorithm>
#define rep(i,a,b) for(int i = a; i <= b; i++)
#define dep(i,a,b) for(int i = a; i >= b; i--)
using namespace std;
const int N = 1000010;
char S[N], T[N];
int pre[N], d[N], q[N], l, r;
int main() {
	int n; scanf("%d",&n);
	scanf("%s",S + 1); scanf("%s",T + 1);
	bool flag = true; rep(i,1,n) if (S[i] != T[i]) flag = false; if (flag) { printf("0\n"); return 0; }
	int mn = n;
	dep(i,n,1) {
		mn = min(mn, i);
		while (mn > 0 && S[mn] != T[i]) mn--;
		if (!mn) { printf("-1\n"); return 0; } 
		pre[i] = mn;
	}
	int ans = 1;
	dep(i,n,1) if (pre[i] > pre[i - 1]) {
		while (l < r && q[l] - (r - l) >= i) l++;
		q[r++] = pre[i];
		if (pre[i] < i) ans = max(ans, r - l + 1); 	
	}
	cout <<ans<<endl;
	return 0;
}

Submission Info

Submission Time
Task F - Shik and Copying String
User WuHongxun
Language C++14 (GCC 5.4.1)
Score 1500
Code Size 811 Byte
Status AC
Exec Time 33 ms
Memory 10112 KB

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:12:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  int n; scanf("%d",&n);
                       ^
./Main.cpp:13:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%s",S + 1); scanf("%s",T + 1);
                   ^
./Main.cpp:13:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%s",S + 1); scanf("%s",T + 1);
                                      ^

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 1500 / 1500
Status
AC × 4
AC × 63
Set Name Test Cases
Sample example0.txt, example1.txt, example2.txt, example3.txt
All 000.txt, 001.txt, 002.txt, 003.txt, 004.txt, 005.txt, 006.txt, 007.txt, 008.txt, 009.txt, 010.txt, 011.txt, 012.txt, 013.txt, 014.txt, 015.txt, 016.txt, 017.txt, 018.txt, 019.txt, 020.txt, 021.txt, 022.txt, 023.txt, 024.txt, 025.txt, 026.txt, 027.txt, 028.txt, 029.txt, 030.txt, 031.txt, 032.txt, 033.txt, 034.txt, 035.txt, 036.txt, 037.txt, 038.txt, 039.txt, 040.txt, 041.txt, 042.txt, 043.txt, 044.txt, 045.txt, 046.txt, 047.txt, 048.txt, 049.txt, 050.txt, 051.txt, 052.txt, 053.txt, 054.txt, 055.txt, 056.txt, 057.txt, 058.txt, example0.txt, example1.txt, example2.txt, example3.txt
Case Name Status Exec Time Memory
000.txt AC 3 ms 256 KB
001.txt AC 3 ms 256 KB
002.txt AC 3 ms 256 KB
003.txt AC 3 ms 256 KB
004.txt AC 3 ms 256 KB
005.txt AC 3 ms 256 KB
006.txt AC 3 ms 256 KB
007.txt AC 3 ms 256 KB
008.txt AC 3 ms 256 KB
009.txt AC 3 ms 256 KB
010.txt AC 3 ms 256 KB
011.txt AC 3 ms 256 KB
012.txt AC 3 ms 256 KB
013.txt AC 3 ms 256 KB
014.txt AC 3 ms 256 KB
015.txt AC 3 ms 256 KB
016.txt AC 3 ms 256 KB
017.txt AC 3 ms 256 KB
018.txt AC 3 ms 256 KB
019.txt AC 3 ms 256 KB
020.txt AC 3 ms 256 KB
021.txt AC 3 ms 256 KB
022.txt AC 3 ms 256 KB
023.txt AC 3 ms 256 KB
024.txt AC 3 ms 256 KB
025.txt AC 11 ms 2176 KB
026.txt AC 24 ms 9984 KB
027.txt AC 21 ms 8064 KB
028.txt AC 33 ms 8576 KB
029.txt AC 33 ms 8576 KB
030.txt AC 24 ms 9728 KB
031.txt AC 25 ms 9600 KB
032.txt AC 26 ms 9088 KB
033.txt AC 25 ms 8960 KB
034.txt AC 24 ms 8448 KB
035.txt AC 24 ms 8192 KB
036.txt AC 23 ms 7808 KB
037.txt AC 23 ms 7680 KB
038.txt AC 22 ms 7424 KB
039.txt AC 22 ms 7168 KB
040.txt AC 27 ms 8320 KB
041.txt AC 26 ms 8960 KB
042.txt AC 25 ms 9856 KB
043.txt AC 25 ms 9856 KB
044.txt AC 25 ms 10112 KB
045.txt AC 25 ms 9984 KB
046.txt AC 24 ms 9984 KB
047.txt AC 25 ms 9984 KB
048.txt AC 24 ms 9984 KB
049.txt AC 25 ms 9984 KB
050.txt AC 17 ms 6144 KB
051.txt AC 17 ms 6144 KB
052.txt AC 14 ms 4096 KB
053.txt AC 23 ms 8064 KB
054.txt AC 23 ms 8064 KB
055.txt AC 23 ms 8064 KB
056.txt AC 23 ms 8064 KB
057.txt AC 23 ms 8064 KB
058.txt AC 23 ms 8064 KB
example0.txt AC 3 ms 256 KB
example1.txt AC 3 ms 256 KB
example2.txt AC 3 ms 256 KB
example3.txt AC 3 ms 256 KB