oj.uz

Submission #128607

# Submission time Handle Problem Language Result Execution time Memory
128607 2019-07-11T07:21:34 Z 구재현(#3166) None (JOI16_ho_t4) C++14
100 / 100
 197 ms 25884 KB 
#include <bits/stdc++.h>
using namespace std;
const int MAXN = 100005;
using lint = long long;
using pi = pair<lint, lint>;

int n, k;
char str[MAXN];

vector<pi> canon(vector<pi> v){
	vector<pi> ev;
	for(auto &i : v){
		ev.emplace_back(i.first, +1);
		ev.emplace_back(i.second + 1, -1);
	}
	sort(ev.begin(), ev.end());
	vector<pi> ret;
	int cnt = 0;
	for(int i=0; i+1<ev.size(); i++){
		cnt += ev[i].second;
		if(ev[i].first != ev[i + 1].first){
			if(cnt > 0){
				ret.emplace_back(ev[i].first, ev[i + 1].first);
			}
		}
	}
	return ret;
}

lint getInsecLength(vector<pi> a, vector<pi> b, vector<pi> c, vector<pi> d){
	vector<pi> ev;
	for(auto &i : a){
		ev.emplace_back(i.first, +1);
		ev.emplace_back(i.second, -1);
	}
	for(auto &i : b){
		ev.emplace_back(i.first, +1);
		ev.emplace_back(i.second, -1);
	}
	for(auto &i : c){
		ev.emplace_back(i.first, +1);
		ev.emplace_back(i.second, -1);
	}
	for(auto &i : d){
		ev.emplace_back(i.first, +1);
		ev.emplace_back(i.second, -1);
	}
	sort(ev.begin(), ev.end());
	int cnt = 0; lint ret = 0;
	for(int i=0; i+1<ev.size(); i++){
		cnt += ev[i].second;
		if(ev[i].first != ev[i + 1].first){
			if(cnt == 4){
				ret += ev[i + 1].first - ev[i].first;
			}
		}
	}
	return ret;

}

int main(){
	scanf("%d %d",&n,&k);
	scanf("%s", str);
	vector<pi> v = {pi(0, 0)};
	lint px = 0, py = 0;
	for(int j=0; j<n; j++){
		if(str[j] == 'E') px++;
		if(str[j] == 'W') px--;
		if(str[j] == 'N') py++;
		if(str[j] == 'S') py--;
		v.emplace_back(px, py);
	}
	if(v.back().first < 0){
		for(auto &i : v) i.first *= -1;
	}
	if(v.back().second < 0){
		for(auto &i : v) i.second *= -1;
	}
	if(v.back().first == 0){
		for(auto &i : v) swap(i.first, i.second);
	}
	if(v.back() == pi(0, 0)){
		sort(v.begin(), v.end());
		v.resize(unique(v.begin(), v.end()) - v.begin());
		lint ret = 0;
		for(auto &i : v){
			if(binary_search(v.begin(), v.end(), pi(i.first + 1, i.second)) &&
					binary_search(v.begin(), v.end(), pi(i.first, 1 + i.second)) &&
					binary_search(v.begin(), v.end(), pi(i.first + 1, 1 + i.second))){
				ret++;
			}
		}
		cout << ret << endl;
		return 0;
	}
	pi vect = v.back();
	v.pop_back();
	map<pi, vector<pi>> mp;
	for(int i=0; i<v.size(); i++){
		lint px = v[i].first;
		lint py = v[i].second;
		lint s = 0, e = k - 1;
		if(i == 0) e = k;
		if(px >= vect.first){
			lint delta = px / vect.first;
			px -= delta * vect.first;
			py -= delta * vect.second;
			s += delta;
			e += delta;
		}
		if(px < 0){
			lint delta = (vect.first - px - 1) / vect.first;
			px += delta * vect.first;
			py += delta * vect.second;
			s -= delta;
			e -= delta;
		}
		assert(px >= 0 && px < vect.first);
	//	printf("event %lld %lld = [%lld, %lld]\n", px, py, s, e);
		mp[pi(px, py)].emplace_back(s, e);
	}
	for(auto &i : mp){
		i.second = canon(i.second);
	}
	lint ret = 0;
	for(auto &i : mp){
		lint x, y; tie(x, y) = i.first;
		auto n2 = pi(x, y + 1);
		auto n3 = pi(x + 1, y);
		auto n4 = pi(x + 1, y + 1);
		if(x + 1 == vect.first){
			n3.first -= vect.first;
			n3.second -= vect.second;
			n4.first -= vect.first;
			n4.second -= vect.second;
		}
		if(mp.count(n2) && mp.count(n3) && mp.count(n4)){
			auto i1 = i.second;
			auto i2 = mp[n2];
			auto i3 = mp[n3];
			auto i4 = mp[n4];
			if(x + 1 == vect.first){
				for(auto &x : i3){
					x.first--; x.second--;
				}
				for(auto &x : i4){
					x.first--; x.second--;
				}
			}
			ret += getInsecLength(i1, i2, i3, i4);
		}
	}
	cout << ret << endl;
	return 0;
}

Compilation message

2016_ho_t4.cpp: In function 'std::vector<std::pair<long long int, long long int> > canon(std::vector<std::pair<long long int, long long int> >)':
2016_ho_t4.cpp:19:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i+1<ev.size(); i++){
               ~~~^~~~~~~~~~
2016_ho_t4.cpp: In function 'lint getInsecLength(std::vector<std::pair<long long int, long long int> >, std::vector<std::pair<long long int, long long int> >, std::vector<std::pair<long long int, long long int> >, std::vector<std::pair<long long int, long long int> >)':
2016_ho_t4.cpp:50:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i+1<ev.size(); i++){
               ~~~^~~~~~~~~~
2016_ho_t4.cpp: In function 'int main()':
2016_ho_t4.cpp:100:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<v.size(); i++){
               ~^~~~~~~~~
2016_ho_t4.cpp:63:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&n,&k);
  ~~~~~^~~~~~~~~~~~~~~
2016_ho_t4.cpp:64:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%s", str);
  ~~~~~^~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 256 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 256 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 256 KB Output is correct
21 Correct 2 ms 256 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 2 ms 376 KB Output is correct
24 Correct 2 ms 256 KB Output is correct
25 Correct 2 ms 256 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 256 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 256 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 256 KB Output is correct
21 Correct 2 ms 256 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 2 ms 376 KB Output is correct
24 Correct 2 ms 256 KB Output is correct
25 Correct 2 ms 256 KB Output is correct
26 Correct 2 ms 376 KB Output is correct
27 Correct 4 ms 632 KB Output is correct
28 Correct 4 ms 760 KB Output is correct
29 Correct 31 ms 3432 KB Output is correct
30 Correct 38 ms 4140 KB Output is correct
31 Correct 79 ms 11492 KB Output is correct
32 Correct 18 ms 2540 KB Output is correct
33 Correct 64 ms 6376 KB Output is correct
34 Correct 60 ms 6372 KB Output is correct
35 Correct 60 ms 6116 KB Output is correct
36 Correct 52 ms 5348 KB Output is correct
37 Correct 18 ms 2664 KB Output is correct
38 Correct 58 ms 5988 KB Output is correct
39 Correct 65 ms 6116 KB Output is correct
40 Correct 19 ms 2664 KB Output is correct
41 Correct 47 ms 4836 KB Output is correct
42 Correct 49 ms 5476 KB Output is correct
43 Correct 64 ms 6116 KB Output is correct
44 Correct 59 ms 6244 KB Output is correct
45 Correct 54 ms 5732 KB Output is correct
46 Correct 72 ms 6756 KB Output is correct
47 Correct 122 ms 9956 KB Output is correct
48 Correct 78 ms 14208 KB Output is correct
49 Correct 98 ms 12900 KB Output is correct
50 Correct 92 ms 13028 KB Output is correct

Subtask #3
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 256 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 256 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 256 KB Output is correct
21 Correct 2 ms 256 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 2 ms 376 KB Output is correct
24 Correct 2 ms 256 KB Output is correct
25 Correct 2 ms 256 KB Output is correct
26 Correct 2 ms 376 KB Output is correct
27 Correct 2 ms 376 KB Output is correct
28 Correct 2 ms 376 KB Output is correct
29 Correct 2 ms 256 KB Output is correct
30 Correct 2 ms 376 KB Output is correct
31 Correct 2 ms 376 KB Output is correct
32 Correct 2 ms 376 KB Output is correct
33 Correct 2 ms 376 KB Output is correct
34 Correct 2 ms 376 KB Output is correct
35 Correct 2 ms 376 KB Output is correct
36 Correct 2 ms 256 KB Output is correct
37 Correct 2 ms 376 KB Output is correct
38 Correct 2 ms 256 KB Output is correct
39 Correct 2 ms 256 KB Output is correct
40 Correct 2 ms 256 KB Output is correct
41 Correct 2 ms 376 KB Output is correct
42 Correct 2 ms 256 KB Output is correct
43 Correct 2 ms 376 KB Output is correct
44 Correct 2 ms 376 KB Output is correct
45 Correct 2 ms 376 KB Output is correct
46 Correct 2 ms 256 KB Output is correct
47 Correct 2 ms 256 KB Output is correct
48 Correct 2 ms 376 KB Output is correct
49 Correct 2 ms 256 KB Output is correct
50 Correct 2 ms 376 KB Output is correct

Subtask #4
62.0 / 62.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 256 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 256 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 256 KB Output is correct
21 Correct 2 ms 256 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 2 ms 376 KB Output is correct
24 Correct 2 ms 256 KB Output is correct
25 Correct 2 ms 256 KB Output is correct
26 Correct 2 ms 376 KB Output is correct
27 Correct 4 ms 632 KB Output is correct
28 Correct 4 ms 760 KB Output is correct
29 Correct 31 ms 3432 KB Output is correct
30 Correct 38 ms 4140 KB Output is correct
31 Correct 79 ms 11492 KB Output is correct
32 Correct 18 ms 2540 KB Output is correct
33 Correct 64 ms 6376 KB Output is correct
34 Correct 60 ms 6372 KB Output is correct
35 Correct 60 ms 6116 KB Output is correct
36 Correct 52 ms 5348 KB Output is correct
37 Correct 18 ms 2664 KB Output is correct
38 Correct 58 ms 5988 KB Output is correct
39 Correct 65 ms 6116 KB Output is correct
40 Correct 19 ms 2664 KB Output is correct
41 Correct 47 ms 4836 KB Output is correct
42 Correct 49 ms 5476 KB Output is correct
43 Correct 64 ms 6116 KB Output is correct
44 Correct 59 ms 6244 KB Output is correct
45 Correct 54 ms 5732 KB Output is correct
46 Correct 72 ms 6756 KB Output is correct
47 Correct 122 ms 9956 KB Output is correct
48 Correct 78 ms 14208 KB Output is correct
49 Correct 98 ms 12900 KB Output is correct
50 Correct 92 ms 13028 KB Output is correct
51 Correct 2 ms 376 KB Output is correct
52 Correct 2 ms 376 KB Output is correct
53 Correct 2 ms 376 KB Output is correct
54 Correct 2 ms 256 KB Output is correct
55 Correct 2 ms 376 KB Output is correct
56 Correct 2 ms 376 KB Output is correct
57 Correct 2 ms 376 KB Output is correct
58 Correct 2 ms 376 KB Output is correct
59 Correct 2 ms 376 KB Output is correct
60 Correct 2 ms 376 KB Output is correct
61 Correct 2 ms 256 KB Output is correct
62 Correct 2 ms 376 KB Output is correct
63 Correct 2 ms 256 KB Output is correct
64 Correct 2 ms 256 KB Output is correct
65 Correct 2 ms 256 KB Output is correct
66 Correct 2 ms 376 KB Output is correct
67 Correct 2 ms 256 KB Output is correct
68 Correct 2 ms 376 KB Output is correct
69 Correct 2 ms 376 KB Output is correct
70 Correct 2 ms 376 KB Output is correct
71 Correct 2 ms 256 KB Output is correct
72 Correct 2 ms 256 KB Output is correct
73 Correct 2 ms 376 KB Output is correct
74 Correct 2 ms 256 KB Output is correct
75 Correct 2 ms 376 KB Output is correct
76 Correct 7 ms 632 KB Output is correct
77 Correct 4 ms 632 KB Output is correct
78 Correct 34 ms 3324 KB Output is correct
79 Correct 47 ms 6636 KB Output is correct
80 Correct 50 ms 4324 KB Output is correct
81 Correct 19 ms 2664 KB Output is correct
82 Correct 57 ms 5988 KB Output is correct
83 Correct 47 ms 4836 KB Output is correct
84 Correct 61 ms 6244 KB Output is correct
85 Correct 62 ms 6116 KB Output is correct
86 Correct 149 ms 18804 KB Output is correct
87 Correct 67 ms 6500 KB Output is correct
88 Correct 57 ms 5864 KB Output is correct
89 Correct 60 ms 5860 KB Output is correct
90 Correct 19 ms 2668 KB Output is correct
91 Correct 63 ms 6352 KB Output is correct
92 Correct 63 ms 6376 KB Output is correct
93 Correct 61 ms 6164 KB Output is correct
94 Correct 53 ms 5476 KB Output is correct
95 Correct 55 ms 5476 KB Output is correct
96 Correct 79 ms 6820 KB Output is correct
97 Correct 119 ms 9956 KB Output is correct
98 Correct 152 ms 25884 KB Output is correct
99 Correct 83 ms 13028 KB Output is correct
100 Correct 197 ms 13024 KB Output is correct