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Submission #20875

# Submission time Handle Problem Language Result Execution time Memory
20875 2017-02-28T16:27:11 Z gs14004 돌 옮기기 (GA7_stone) C++11
100 / 100
 103 ms 5316 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long lint;
typedef long double llf;
typedef pair<lint, lint> pi;
const int mod = 1e9 + 7;

string s, t;
int l, n, fail[400005];

int main(){
	cin >> l >> n;
	for(int i=0; i<2*n; i++){
		char t[5];
		scanf("%*d %s",t);
		s.push_back(*t);
	}
	string t = s + s;
	for(auto &i : s) i = 'W' + 'B' - i;
	int p = 0, ans = 1e9;
	for(int i=1; i<s.size(); i++){
		while(p > 0 && s[i] != s[p]) p = fail[p];
		if(s[i] == s[p]) p++;
		fail[i+1] = p;
	}
	p = 0;
	for(int i=0; i<t.size(); i++){
		while(p > 0 && t[i] != s[p]) p = fail[p];
		if(t[i] == s[p]) p++;
		if(p == s.size()){
			ans = min({ans, i+1-2*n, 4*n-i-1});
          p = fail[p];
		}
	}
	if(ans > 1e8){
		puts("-1");
		return 0;
	}
	cout << 1ll * ans * l;
}

Compilation message

stone.cpp: In function 'int main()':
stone.cpp:21:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=1; i<s.size(); i++){
                ^
stone.cpp:27:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<t.size(); i++){
                ^
stone.cpp:30:8: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(p == s.size()){
        ^
stone.cpp:15:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%*d %s",t);
                    ^

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 3580 KB Output is correct
2 Correct 0 ms 3580 KB Output is correct
3 Correct 0 ms 3580 KB Output is correct
4 Correct 0 ms 3580 KB Output is correct
5 Correct 0 ms 3580 KB Output is correct
6 Correct 0 ms 3580 KB Output is correct
7 Correct 0 ms 3580 KB Output is correct
8 Correct 0 ms 3580 KB Output is correct
9 Correct 0 ms 3580 KB Output is correct
10 Correct 0 ms 3580 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 3580 KB Output is correct
2 Correct 0 ms 3580 KB Output is correct
3 Correct 0 ms 3580 KB Output is correct
4 Correct 0 ms 3580 KB Output is correct
5 Correct 0 ms 3580 KB Output is correct
6 Correct 0 ms 3580 KB Output is correct
7 Correct 0 ms 3580 KB Output is correct
8 Correct 0 ms 3580 KB Output is correct
9 Correct 0 ms 3580 KB Output is correct
10 Correct 0 ms 3580 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 3580 KB Output is correct
2 Correct 0 ms 3580 KB Output is correct
3 Correct 0 ms 3580 KB Output is correct
4 Correct 0 ms 3580 KB Output is correct
5 Correct 0 ms 3580 KB Output is correct
6 Correct 0 ms 3580 KB Output is correct
7 Correct 0 ms 3580 KB Output is correct
8 Correct 0 ms 3580 KB Output is correct
9 Correct 0 ms 3580 KB Output is correct
10 Correct 0 ms 3580 KB Output is correct
11 Correct 0 ms 3580 KB Output is correct
12 Correct 0 ms 3580 KB Output is correct
13 Correct 0 ms 3580 KB Output is correct
14 Correct 0 ms 3580 KB Output is correct
15 Correct 0 ms 3580 KB Output is correct

Subtask #4
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 3580 KB Output is correct
2 Correct 0 ms 3580 KB Output is correct
3 Correct 0 ms 3580 KB Output is correct
4 Correct 0 ms 3580 KB Output is correct
5 Correct 0 ms 3580 KB Output is correct
6 Correct 0 ms 3580 KB Output is correct
7 Correct 0 ms 3580 KB Output is correct
8 Correct 0 ms 3580 KB Output is correct
9 Correct 0 ms 3580 KB Output is correct
10 Correct 0 ms 3580 KB Output is correct
11 Correct 0 ms 3580 KB Output is correct
12 Correct 0 ms 3580 KB Output is correct
13 Correct 0 ms 3580 KB Output is correct
14 Correct 0 ms 3580 KB Output is correct
15 Correct 0 ms 3580 KB Output is correct
16 Correct 0 ms 3580 KB Output is correct
17 Correct 0 ms 3580 KB Output is correct
18 Correct 0 ms 3580 KB Output is correct
19 Correct 0 ms 3580 KB Output is correct
20 Correct 0 ms 3580 KB Output is correct

Subtask #5
44.0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 4488 KB Output is correct
2 Correct 43 ms 4604 KB Output is correct
3 Correct 36 ms 4476 KB Output is correct
4 Correct 16 ms 4104 KB Output is correct
5 Correct 43 ms 4864 KB Output is correct
6 Correct 73 ms 5292 KB Output is correct
7 Correct 59 ms 4964 KB Output is correct
8 Correct 73 ms 5256 KB Output is correct
9 Correct 66 ms 5076 KB Output is correct
10 Correct 76 ms 5300 KB Output is correct
11 Correct 63 ms 5076 KB Output is correct
12 Correct 79 ms 5312 KB Output is correct
13 Correct 83 ms 5304 KB Output is correct
14 Correct 89 ms 5316 KB Output is correct
15 Correct 89 ms 5316 KB Output is correct
16 Correct 89 ms 5316 KB Output is correct
17 Correct 83 ms 5316 KB Output is correct
18 Correct 83 ms 5316 KB Output is correct
19 Correct 93 ms 5316 KB Output is correct
20 Correct 99 ms 5316 KB Output is correct
21 Correct 93 ms 5316 KB Output is correct
22 Correct 99 ms 5316 KB Output is correct
23 Correct 89 ms 5316 KB Output is correct
24 Correct 86 ms 5316 KB Output is correct
25 Correct 89 ms 5316 KB Output is correct
26 Correct 86 ms 5316 KB Output is correct
27 Correct 99 ms 5316 KB Output is correct
28 Correct 86 ms 5316 KB Output is correct
29 Correct 103 ms 5316 KB Output is correct
30 Correct 86 ms 5316 KB Output is correct