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답안 #336637

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
336637 2020-12-16T07:06:30 Z ChrisT 영역 (JOI16_ho_t4) C++17
100 / 100
 382 ms 180204 KB 
#include <bits/stdc++.h>
using namespace std;
const int MN = 5e5 + 5;
struct Stupid {
	map<long long,long long> row,row2;
	set<long long> dub,dub2,intersect;
	void add (long long i, long long v) {
		if (!row.count(i)) {
			row[i] += v;
			//assert(row[i] >= 0);
			if (row.count(i-1)) {
				dub.insert(i-1);
				if (dub2.count(i-1)) intersect.insert(i-1);
			}
			if (row.count(i+1)) {
				dub.insert(i);
				if (dub2.count(i)) intersect.insert(i);
			}
			return;
		}
		if (!(row[i] += v)) {
			row.erase(i);
			if (row.count(i-1)) {
				dub.erase(i-1);
				if (dub2.count(i-1)) intersect.erase(i-1);
			}
			if (row.count(i+1)) {
				dub.erase(i);
				if (dub2.count(i)) intersect.erase(i);
			}
		}
	}
	void add2 (long long i, long long v) {
		if (!row2.count(i)) {
			row2[i] += v;
			if (row2.count(i-1)) {
				dub2.insert(i-1);
				if (dub.count(i-1)) intersect.insert(i-1);
			}
			if (row2.count(i+1)) {
				dub2.insert(i);
				if (dub.count(i)) intersect.insert(i);
			}
			return;
		}
		if (!(row2[i] += v)) {
			row2.erase(i);
			if (row2.count(i-1)) {
				dub2.erase(i-1);
				if (dub.count(i-1)) intersect.erase(i-1);
			}
			if (row2.count(i+1)) {
				dub2.erase(i);
				if (dub.count(i)) intersect.erase(i);
			}
		}
	}
};
char s[MN];
int main() { 
	int n; long long k;
	scanf ("%d %lld\n%s",&n,&k,s+1);
	int dx = 0, dy = 0;
	for (int i = 1; i <= n; i++) {
		if (s[i] == 'E') dx++;
		else if (s[i] == 'W') dx--;
		else if (s[i] == 'S') dy++;
		else dy--;
	}
	if (dx < 0) {
		for (int i = 1; i <= n; i++) {
			if (s[i] == 'E') s[i] = 'W';
			else if (s[i] == 'W') s[i] = 'E';
		}
		dx = -dx;
	}
	if (dy < 0) {
		for (int i = 1; i <= n; i++) {
			if (s[i] == 'S') s[i] = 'N';
			else if (s[i] == 'N') s[i] = 'S';
		}
		dy = -dy;
	}
	if (dx == 0 && dy == 0) { //TODO special case stupid
		set<pair<int,int>> st;
		dx = 0, dy = 0; st.emplace(0,0);
		for (int i = 1; i <= n; i++) {
			if (s[i] == 'E') dx++;
			else if (s[i] == 'W') dx--;
			else if (s[i] == 'S') dy++;
			else dy--;
			st.emplace(dx,dy);
		}
		int res = 0;
		for (auto [x,y] : st) {
			if (st.count({x+1,y}) && st.count({x,y+1}) && st.count({x+1,y+1})) {
				res++;
			}
		}
		printf ("%d\n",res);
		return 0;
	}
	if (dy == 0) {
		for (int i = 1; i <= n; i++) {
			if (s[i] == 'E') s[i] = 'S';
			else if (s[i] == 'W') s[i] = 'N';
			else if (s[i] == 'S') s[i] = 'E';
			else s[i] = 'W';
		}
		swap(dx,dy);
	}
	//we have dy > 0, dx >= 0
	int top = 0, cur = 0;
	for (int i = 1; i <= n; i++) {
		if (s[i] == 'N') top = min(top,--cur);
		else if (s[i] == 'S') ++cur;
	}
	vector<map<long long,int>> monke(MN);
	vector<Stupid> row(MN);
	int curx = 0, cury = 0, mxy = -top;
	monke[-top][0]++;
	for (int i = 1; i <= n; i++) {
		if (s[i] == 'E') ++curx;
		else if (s[i] == 'W') --curx;
		else if (s[i] == 'N') --cury;
		else ++cury;
		mxy = max(mxy,cury - top);
		monke[cury - top][curx]++;
	}
	long long ret = 0, L = mxy + 2, R = k * dy - 1;
	vector<long long> lz(MN); vector<int> lst(MN);
	for (int i = 0; i < L; i++) {
		lst[i%dy] = i;
		if (i >= dy) {
			lz[i] = lz[i-dy] + dx; swap(row[i],row[i-dy]);
			for (auto [j,cnt] : monke[i]) row[i].add(j-lz[i],cnt);
			for (auto [j,cnt] : monke[i-1]) row[i].add2(j-lz[i],cnt);
		} else {
			for (auto [j,cnt] : monke[i])
				row[i].add(j,cnt);
			if (i) for (auto [j,cnt] : monke[i-1])
				row[i].add2(j,cnt);
		}
		if (i >= k * dy) {
			for (auto [j,cnt] : monke[i-dy*k]) {
				row[i].add(j + k * dx - lz[i],-cnt);
			}
			if (i - 1 >= k * dy) {
				for (auto [j,cnt] : monke[i - dy * k - 1]) {
					row[i].add2(j + k * dx - lz[i],-cnt);
				}
			}
		}
		if (!row[i].row.empty()) {
			ret += (int)row[i].intersect.size();
		}
	}
	//printf ("ret %lld\n",ret);
	for (int res = 0; res < dy; res++) {
		long long cnt = max(0LL,(R - res) / dy - (L - 1 - res) / dy);
		//printf ("res %d cnt %lld\n",res,cnt);
		ret += (long long)row[lst[res]].intersect.size() * cnt; lz[lst[res]] += dx * cnt;
	}
	//printf ("ret %lld\n",ret);
	for (long long i = max(L,R+1); i <= R + 2 + mxy; i++) {
		int idx = lst[i % dy]; lz[idx] += dx;
		//printf ("i %lld idx %d\n",i,idx);
		for (auto [j,cnt] : monke[i - dy * k]) {
			row[idx].add(j + k * dx - lz[idx],-cnt);
		}
		if (i >= dy * k + 1) for (auto [j,cnt] : monke[i - dy * k - 1]) {
			row[idx].add2(j + k * dx - lz[idx], -cnt);
		}
		if (!row[idx].row.empty()) {
			ret += (int)row[idx].intersect.size();
		}
	} 
	printf ("%lld\n",ret);
	return 0;
}

Compilation message

2016_ho_t4.cpp: In function 'int main()':
2016_ho_t4.cpp:62:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   62 |  scanf ("%d %lld\n%s",&n,&k,s+1);
      |  ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 104 ms 147180 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 105 ms 147052 KB Output is correct
4 Correct 103 ms 147072 KB Output is correct
5 Correct 104 ms 147052 KB Output is correct
6 Correct 105 ms 147052 KB Output is correct
7 Correct 104 ms 147180 KB Output is correct
8 Correct 104 ms 147052 KB Output is correct
9 Correct 102 ms 147180 KB Output is correct
10 Correct 105 ms 147052 KB Output is correct
11 Correct 103 ms 147128 KB Output is correct
12 Correct 104 ms 147052 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 104 ms 147052 KB Output is correct
15 Correct 104 ms 147052 KB Output is correct
16 Correct 104 ms 147052 KB Output is correct
17 Correct 103 ms 147052 KB Output is correct
18 Correct 103 ms 147052 KB Output is correct
19 Correct 104 ms 147052 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 103 ms 147052 KB Output is correct
22 Correct 104 ms 147052 KB Output is correct
23 Correct 104 ms 147052 KB Output is correct
24 Correct 1 ms 364 KB Output is correct
25 Correct 104 ms 147052 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 104 ms 147180 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 105 ms 147052 KB Output is correct
4 Correct 103 ms 147072 KB Output is correct
5 Correct 104 ms 147052 KB Output is correct
6 Correct 105 ms 147052 KB Output is correct
7 Correct 104 ms 147180 KB Output is correct
8 Correct 104 ms 147052 KB Output is correct
9 Correct 102 ms 147180 KB Output is correct
10 Correct 105 ms 147052 KB Output is correct
11 Correct 103 ms 147128 KB Output is correct
12 Correct 104 ms 147052 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 104 ms 147052 KB Output is correct
15 Correct 104 ms 147052 KB Output is correct
16 Correct 104 ms 147052 KB Output is correct
17 Correct 103 ms 147052 KB Output is correct
18 Correct 103 ms 147052 KB Output is correct
19 Correct 104 ms 147052 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 103 ms 147052 KB Output is correct
22 Correct 104 ms 147052 KB Output is correct
23 Correct 104 ms 147052 KB Output is correct
24 Correct 1 ms 364 KB Output is correct
25 Correct 104 ms 147052 KB Output is correct
26 Correct 104 ms 147180 KB Output is correct
27 Correct 107 ms 147308 KB Output is correct
28 Correct 3 ms 492 KB Output is correct
29 Correct 132 ms 149996 KB Output is correct
30 Correct 132 ms 149740 KB Output is correct
31 Correct 198 ms 157548 KB Output is correct
32 Correct 18 ms 1516 KB Output is correct
33 Correct 144 ms 154604 KB Output is correct
34 Correct 153 ms 151400 KB Output is correct
35 Correct 150 ms 154092 KB Output is correct
36 Correct 142 ms 151020 KB Output is correct
37 Correct 20 ms 1644 KB Output is correct
38 Correct 148 ms 151020 KB Output is correct
39 Correct 143 ms 153964 KB Output is correct
40 Correct 20 ms 1516 KB Output is correct
41 Correct 137 ms 149296 KB Output is correct
42 Correct 135 ms 151276 KB Output is correct
43 Correct 155 ms 152556 KB Output is correct
44 Correct 144 ms 151660 KB Output is correct
45 Correct 142 ms 152940 KB Output is correct
46 Correct 181 ms 157036 KB Output is correct
47 Correct 249 ms 163692 KB Output is correct
48 Correct 122 ms 153580 KB Output is correct
49 Correct 139 ms 166252 KB Output is correct
50 Correct 138 ms 166124 KB Output is correct

Subtask #3
23.0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 104 ms 147180 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 105 ms 147052 KB Output is correct
4 Correct 103 ms 147072 KB Output is correct
5 Correct 104 ms 147052 KB Output is correct
6 Correct 105 ms 147052 KB Output is correct
7 Correct 104 ms 147180 KB Output is correct
8 Correct 104 ms 147052 KB Output is correct
9 Correct 102 ms 147180 KB Output is correct
10 Correct 105 ms 147052 KB Output is correct
11 Correct 103 ms 147128 KB Output is correct
12 Correct 104 ms 147052 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 104 ms 147052 KB Output is correct
15 Correct 104 ms 147052 KB Output is correct
16 Correct 104 ms 147052 KB Output is correct
17 Correct 103 ms 147052 KB Output is correct
18 Correct 103 ms 147052 KB Output is correct
19 Correct 104 ms 147052 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 103 ms 147052 KB Output is correct
22 Correct 104 ms 147052 KB Output is correct
23 Correct 104 ms 147052 KB Output is correct
24 Correct 1 ms 364 KB Output is correct
25 Correct 104 ms 147052 KB Output is correct
26 Correct 101 ms 147052 KB Output is correct
27 Correct 1 ms 384 KB Output is correct
28 Correct 103 ms 147052 KB Output is correct
29 Correct 101 ms 147052 KB Output is correct
30 Correct 103 ms 147052 KB Output is correct
31 Correct 102 ms 147052 KB Output is correct
32 Correct 101 ms 147052 KB Output is correct
33 Correct 102 ms 147052 KB Output is correct
34 Correct 108 ms 147180 KB Output is correct
35 Correct 102 ms 147052 KB Output is correct
36 Correct 101 ms 147052 KB Output is correct
37 Correct 102 ms 147052 KB Output is correct
38 Correct 100 ms 147052 KB Output is correct
39 Correct 100 ms 147052 KB Output is correct
40 Correct 1 ms 364 KB Output is correct
41 Correct 102 ms 147052 KB Output is correct
42 Correct 1 ms 364 KB Output is correct
43 Correct 100 ms 147052 KB Output is correct
44 Correct 101 ms 147052 KB Output is correct
45 Correct 101 ms 147052 KB Output is correct
46 Correct 102 ms 147052 KB Output is correct
47 Correct 103 ms 147180 KB Output is correct
48 Correct 102 ms 147052 KB Output is correct
49 Correct 102 ms 147052 KB Output is correct
50 Correct 100 ms 147052 KB Output is correct

Subtask #4
62.0 / 62.0

# 결과 실행 시간 메모리 Grader output
1 Correct 104 ms 147180 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 105 ms 147052 KB Output is correct
4 Correct 103 ms 147072 KB Output is correct
5 Correct 104 ms 147052 KB Output is correct
6 Correct 105 ms 147052 KB Output is correct
7 Correct 104 ms 147180 KB Output is correct
8 Correct 104 ms 147052 KB Output is correct
9 Correct 102 ms 147180 KB Output is correct
10 Correct 105 ms 147052 KB Output is correct
11 Correct 103 ms 147128 KB Output is correct
12 Correct 104 ms 147052 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 104 ms 147052 KB Output is correct
15 Correct 104 ms 147052 KB Output is correct
16 Correct 104 ms 147052 KB Output is correct
17 Correct 103 ms 147052 KB Output is correct
18 Correct 103 ms 147052 KB Output is correct
19 Correct 104 ms 147052 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 103 ms 147052 KB Output is correct
22 Correct 104 ms 147052 KB Output is correct
23 Correct 104 ms 147052 KB Output is correct
24 Correct 1 ms 364 KB Output is correct
25 Correct 104 ms 147052 KB Output is correct
26 Correct 104 ms 147180 KB Output is correct
27 Correct 107 ms 147308 KB Output is correct
28 Correct 3 ms 492 KB Output is correct
29 Correct 132 ms 149996 KB Output is correct
30 Correct 132 ms 149740 KB Output is correct
31 Correct 198 ms 157548 KB Output is correct
32 Correct 18 ms 1516 KB Output is correct
33 Correct 144 ms 154604 KB Output is correct
34 Correct 153 ms 151400 KB Output is correct
35 Correct 150 ms 154092 KB Output is correct
36 Correct 142 ms 151020 KB Output is correct
37 Correct 20 ms 1644 KB Output is correct
38 Correct 148 ms 151020 KB Output is correct
39 Correct 143 ms 153964 KB Output is correct
40 Correct 20 ms 1516 KB Output is correct
41 Correct 137 ms 149296 KB Output is correct
42 Correct 135 ms 151276 KB Output is correct
43 Correct 155 ms 152556 KB Output is correct
44 Correct 144 ms 151660 KB Output is correct
45 Correct 142 ms 152940 KB Output is correct
46 Correct 181 ms 157036 KB Output is correct
47 Correct 249 ms 163692 KB Output is correct
48 Correct 122 ms 153580 KB Output is correct
49 Correct 139 ms 166252 KB Output is correct
50 Correct 138 ms 166124 KB Output is correct
51 Correct 101 ms 147052 KB Output is correct
52 Correct 1 ms 384 KB Output is correct
53 Correct 103 ms 147052 KB Output is correct
54 Correct 101 ms 147052 KB Output is correct
55 Correct 103 ms 147052 KB Output is correct
56 Correct 102 ms 147052 KB Output is correct
57 Correct 101 ms 147052 KB Output is correct
58 Correct 102 ms 147052 KB Output is correct
59 Correct 108 ms 147180 KB Output is correct
60 Correct 102 ms 147052 KB Output is correct
61 Correct 101 ms 147052 KB Output is correct
62 Correct 102 ms 147052 KB Output is correct
63 Correct 100 ms 147052 KB Output is correct
64 Correct 100 ms 147052 KB Output is correct
65 Correct 1 ms 364 KB Output is correct
66 Correct 102 ms 147052 KB Output is correct
67 Correct 1 ms 364 KB Output is correct
68 Correct 100 ms 147052 KB Output is correct
69 Correct 101 ms 147052 KB Output is correct
70 Correct 101 ms 147052 KB Output is correct
71 Correct 102 ms 147052 KB Output is correct
72 Correct 103 ms 147180 KB Output is correct
73 Correct 102 ms 147052 KB Output is correct
74 Correct 102 ms 147052 KB Output is correct
75 Correct 100 ms 147052 KB Output is correct
76 Correct 102 ms 147436 KB Output is correct
77 Correct 2 ms 492 KB Output is correct
78 Correct 125 ms 151100 KB Output is correct
79 Correct 166 ms 158444 KB Output is correct
80 Correct 138 ms 151276 KB Output is correct
81 Correct 20 ms 1644 KB Output is correct
82 Correct 146 ms 153580 KB Output is correct
83 Correct 123 ms 149740 KB Output is correct
84 Correct 145 ms 154148 KB Output is correct
85 Correct 157 ms 154220 KB Output is correct
86 Correct 225 ms 160364 KB Output is correct
87 Correct 150 ms 155500 KB Output is correct
88 Correct 139 ms 153256 KB Output is correct
89 Correct 152 ms 153580 KB Output is correct
90 Correct 19 ms 1644 KB Output is correct
91 Correct 145 ms 154604 KB Output is correct
92 Correct 145 ms 154860 KB Output is correct
93 Correct 150 ms 154476 KB Output is correct
94 Correct 133 ms 152192 KB Output is correct
95 Correct 140 ms 152428 KB Output is correct
96 Correct 191 ms 157164 KB Output is correct
97 Correct 247 ms 163820 KB Output is correct
98 Correct 124 ms 153716 KB Output is correct
99 Correct 138 ms 166124 KB Output is correct
100 Correct 382 ms 180204 KB Output is correct