oj.uz

Submission #128853

# Submission time Handle Problem Language Result Execution time Memory
128853 2019-07-11T10:15:00 Z onjo0127 None (JOI16_ho_t4) C++11
28 / 100
 55 ms 47992 KB 
#include <bits/stdc++.h>
using namespace std;
using pii = pair<int, int>;
using pli = pair<long long, int>;
using tiii = tuple<int, int, int>;
#define X first
#define Y second

const int le9 = 1e9;
const pii INF = {-1e9, -1e9};

pii df; int dx, dy;
int N, K, P[1000009];
int x1[4][1000009], x2[4][1000009], y[1000009];
char S[1000009];
set<pii> st;

void mv(pii &CR, char c) {
	if(c == 'S') --CR.Y;
	if(c == 'N') ++CR.Y;
	if(c == 'W') --CR.X;
	if(c == 'E') ++CR.X;
}

void input() {
	scanf("%d%d",&N,&K);
	assert(N <= 50);
	for(int i=1; i<=N; i++) {
		scanf(" %c", &S[i]);
		mv(df, S[i]);
	}
	if(df.X < 0) {
		df.X = -df.X;
		for(int i=1; i<=N; i++) {
			if(S[i] == 'W') S[i] = 'E';
			else if(S[i] == 'E') S[i] = 'W';
		}
	}
	if(df.Y < 0) {
		df.Y = -df.Y;
		for(int i=1; i<=N; i++) {
			if(S[i] == 'N') S[i] = 'S';
			else if(S[i] == 'S') S[i] = 'N';
		}
	}
}

void go(pii &now) {
	st.insert(now);
	for(int i=1; i<=N; i++) {
		mv(now, S[i]);
		st.insert(now);
	}
}

int cnt() {
	int ret = 0;
	for(auto& it: st) {
		int c = 0;
		if(st.find({it.X+1, it.Y}) != st.end()) ++c;
		if(st.find({it.X, it.Y+1}) != st.end()) ++c;
		if(st.find({it.X+1, it.Y+1}) != st.end()) ++c;
		if(c == 3) ++ret;
	}
	return ret;
}

pli geti(pii A) {
	if(dx == 0) return {A.X, A.Y % dy};
	if(dy == 0) return {A.Y, A.X % dx};
	return {1LL * A.X * dy - 1LL * A.Y * dx, A.Y % dy};
}

int day(pii A, pii B) {
	return (dx ? (A.X - B.X) / dx : (A.Y - B.Y) / dy) + 1;
}

vector<pii> A;

pii RC(pii U) {
	if(U.Y == 0) return A[U.X];
	if(U.Y == 1) return {A[U.X].X+1, A[U.X].Y};
	if(U.Y == 2) return {A[U.X].X, A[U.X].Y+1};
	if(U.Y == 3) return {A[U.X].X+1, A[U.X].Y+1};
}

vector<pii> T[1000009];

int main() {
	input(); tie(dx, dy) = df;
	pii now = {100000, 100000}; go(now);
	// printf("dx: %d, dy: %d\n", dx, dy);

	if(dx == 0 && dy == 0) return !printf("%d", cnt());
	
	map<pli, int> id; int M = 0;
	for(auto& it: st) {
		if(id[geti(it)] == 0) id[geti(it)] = ++M; 
		if(id[geti({it.X+1, it.Y})] == 0) id[geti({it.X+1, it.Y})] = ++M;
		if(id[geti({it.X, it.Y+1})] == 0) id[geti({it.X, it.Y+1})] = ++M;
		if(id[geti({it.X+1, it.Y+1})] == 0) id[geti({it.X+1, it.Y+1})] = ++M;
	}
	for(auto& it: st) {
		T[id[geti(it)]].push_back({A.size(), 0});
		T[id[geti({it.X+1, it.Y})]].push_back({A.size(), 1});
		T[id[geti({it.X, it.Y+1})]].push_back({A.size(), 2});
		T[id[geti({it.X+1, it.Y+1})]].push_back({A.size(), 3});
		A.push_back(it);
	}
	int E = A.size();
	for(int i=1; i<=M; i++) {
		sort(T[i].begin(), T[i].end(), [&](pii PP, pii QQ) {
			if(RC(PP) == RC(QQ)) return PP.Y < QQ.Y;
			return RC(PP) < RC(QQ);
		});
		// for(auto& it: T[i]) printf("Ai: %d, (%d, %d), type: %d\n", it.X, RC(it).X - le9, RC(it).Y - le9, it.Y);
		// puts("------------------");
		// calculate x1
		pii prv = INF;
		for(auto& it: T[i]) {
			if(it.Y == 0) prv = RC(it);
			else {
				if(prv == INF) continue;
				x1[it.Y][it.X] = day(RC(it), prv);
				assert(N >= x1[it.Y][it.X] && x1[it.Y][it.X] >= 1);
			}
		}
		reverse(T[i].begin(), T[i].end());
		// calculate x2 and y
		prv = INF;
		for(auto& it: T[i]) {
			if(it.Y == 0) {
				if(prv != INF) {
					y[it.X] = day(prv, RC(it));
					assert(N >= y[it.X] && y[it.X] >= 1);
				}
				prv = RC(it);
			}
			else {
				if(prv == INF) continue;
				x2[it.Y][it.X] = day(prv, RC(it));
				assert(x2[it.Y][it.X] <= N && x2[it.Y][it.X] >= 0);
			}
		}
	}
	int inf = 1000000;
	for(int i=0; i<E; i++) {
		int X1 = 2*inf, X2 = 2*inf, Y = 2*inf;
		if(x1[1][i] && x1[2][i] && x1[3][i]) X1 = max({x1[1][i], x1[2][i], x1[3][i]});
		if(x2[1][i] && x2[2][i] && x2[3][i]) X2 = max({x2[1][i], x2[2][i], x2[3][i]});
		if(y[i]) Y = y[i];

		int s1 = X1, e1 = X1 + Y - 2;
		int s2 = X2, e2 = Y - 1;
		e1 = min(e1, X1 + X2 - 2);
		s1 = min(s1, inf);
		e1 = min(e1, inf);
		s2 = min(s2, inf);
		e2 = min(e2, inf);
		if(s1 <= e1) ++P[s1], --P[e1+1];
		if(s2 <= e2) ++P[s2], --P[e2+1];
		// printf("i: %d, (%d, %d), x1: %d, x2: %d, y: %d, [%d, %d], [%d, %d]\n", i, A[i].X-le9, A[i].Y-le9, X1, X2, Y, s1, e1, s2, e2);
	}
	long long ds = 0, sum = 0;
	for(int i=1; i<inf; i++) {
		ds += P[i];
		sum += ds;
		if(i == K) {
			return !printf("%lld", sum);
		}
	}
	printf("%lld", sum + ds*(K-inf+1));
	return 0;
}

Compilation message

2016_ho_t4.cpp: In function 'void input()':
2016_ho_t4.cpp:26:7: 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:29:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf(" %c", &S[i]);
   ~~~~~^~~~~~~~~~~~~~
2016_ho_t4.cpp: In function 'pii RC(pii)':
2016_ho_t4.cpp:85:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23800 KB Output is correct
2 Correct 23 ms 23928 KB Output is correct
3 Correct 23 ms 23828 KB Output is correct
4 Correct 24 ms 23800 KB Output is correct
5 Correct 23 ms 23800 KB Output is correct
6 Correct 24 ms 23928 KB Output is correct
7 Correct 23 ms 23800 KB Output is correct
8 Correct 23 ms 23900 KB Output is correct
9 Correct 23 ms 23800 KB Output is correct
10 Correct 23 ms 23800 KB Output is correct
11 Correct 23 ms 23928 KB Output is correct
12 Correct 24 ms 23928 KB Output is correct
13 Correct 23 ms 23800 KB Output is correct
14 Correct 24 ms 23800 KB Output is correct
15 Correct 24 ms 23928 KB Output is correct
16 Correct 24 ms 23928 KB Output is correct
17 Correct 24 ms 23928 KB Output is correct
18 Correct 23 ms 23928 KB Output is correct
19 Correct 23 ms 23900 KB Output is correct
20 Correct 24 ms 23800 KB Output is correct
21 Correct 23 ms 23928 KB Output is correct
22 Correct 24 ms 23800 KB Output is correct
23 Correct 23 ms 23928 KB Output is correct
24 Correct 23 ms 23800 KB Output is correct
25 Correct 23 ms 23928 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23800 KB Output is correct
2 Correct 23 ms 23928 KB Output is correct
3 Correct 23 ms 23828 KB Output is correct
4 Correct 24 ms 23800 KB Output is correct
5 Correct 23 ms 23800 KB Output is correct
6 Correct 24 ms 23928 KB Output is correct
7 Correct 23 ms 23800 KB Output is correct
8 Correct 23 ms 23900 KB Output is correct
9 Correct 23 ms 23800 KB Output is correct
10 Correct 23 ms 23800 KB Output is correct
11 Correct 23 ms 23928 KB Output is correct
12 Correct 24 ms 23928 KB Output is correct
13 Correct 23 ms 23800 KB Output is correct
14 Correct 24 ms 23800 KB Output is correct
15 Correct 24 ms 23928 KB Output is correct
16 Correct 24 ms 23928 KB Output is correct
17 Correct 24 ms 23928 KB Output is correct
18 Correct 23 ms 23928 KB Output is correct
19 Correct 23 ms 23900 KB Output is correct
20 Correct 24 ms 23800 KB Output is correct
21 Correct 23 ms 23928 KB Output is correct
22 Correct 24 ms 23800 KB Output is correct
23 Correct 23 ms 23928 KB Output is correct
24 Correct 23 ms 23800 KB Output is correct
25 Correct 23 ms 23928 KB Output is correct
26 Runtime error 55 ms 47992 KB Execution killed with signal 11 (could be triggered by violating memory limits)
27 Halted 0 ms 0 KB -

Subtask #3
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23800 KB Output is correct
2 Correct 23 ms 23928 KB Output is correct
3 Correct 23 ms 23828 KB Output is correct
4 Correct 24 ms 23800 KB Output is correct
5 Correct 23 ms 23800 KB Output is correct
6 Correct 24 ms 23928 KB Output is correct
7 Correct 23 ms 23800 KB Output is correct
8 Correct 23 ms 23900 KB Output is correct
9 Correct 23 ms 23800 KB Output is correct
10 Correct 23 ms 23800 KB Output is correct
11 Correct 23 ms 23928 KB Output is correct
12 Correct 24 ms 23928 KB Output is correct
13 Correct 23 ms 23800 KB Output is correct
14 Correct 24 ms 23800 KB Output is correct
15 Correct 24 ms 23928 KB Output is correct
16 Correct 24 ms 23928 KB Output is correct
17 Correct 24 ms 23928 KB Output is correct
18 Correct 23 ms 23928 KB Output is correct
19 Correct 23 ms 23900 KB Output is correct
20 Correct 24 ms 23800 KB Output is correct
21 Correct 23 ms 23928 KB Output is correct
22 Correct 24 ms 23800 KB Output is correct
23 Correct 23 ms 23928 KB Output is correct
24 Correct 23 ms 23800 KB Output is correct
25 Correct 23 ms 23928 KB Output is correct
26 Correct 23 ms 24056 KB Output is correct
27 Correct 23 ms 23800 KB Output is correct
28 Correct 29 ms 23804 KB Output is correct
29 Correct 26 ms 23840 KB Output is correct
30 Correct 24 ms 24056 KB Output is correct
31 Correct 25 ms 23800 KB Output is correct
32 Correct 29 ms 23804 KB Output is correct
33 Correct 29 ms 23932 KB Output is correct
34 Correct 23 ms 23800 KB Output is correct
35 Correct 25 ms 23928 KB Output is correct
36 Correct 25 ms 23928 KB Output is correct
37 Correct 26 ms 23928 KB Output is correct
38 Correct 25 ms 23928 KB Output is correct
39 Correct 25 ms 23800 KB Output is correct
40 Correct 23 ms 23772 KB Output is correct
41 Correct 25 ms 23900 KB Output is correct
42 Correct 23 ms 23800 KB Output is correct
43 Correct 25 ms 23796 KB Output is correct
44 Correct 25 ms 23800 KB Output is correct
45 Correct 25 ms 23800 KB Output is correct
46 Correct 25 ms 23904 KB Output is correct
47 Correct 25 ms 23892 KB Output is correct
48 Correct 33 ms 23900 KB Output is correct
49 Correct 31 ms 23928 KB Output is correct
50 Correct 26 ms 23800 KB Output is correct

Subtask #4
0 / 62.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23800 KB Output is correct
2 Correct 23 ms 23928 KB Output is correct
3 Correct 23 ms 23828 KB Output is correct
4 Correct 24 ms 23800 KB Output is correct
5 Correct 23 ms 23800 KB Output is correct
6 Correct 24 ms 23928 KB Output is correct
7 Correct 23 ms 23800 KB Output is correct
8 Correct 23 ms 23900 KB Output is correct
9 Correct 23 ms 23800 KB Output is correct
10 Correct 23 ms 23800 KB Output is correct
11 Correct 23 ms 23928 KB Output is correct
12 Correct 24 ms 23928 KB Output is correct
13 Correct 23 ms 23800 KB Output is correct
14 Correct 24 ms 23800 KB Output is correct
15 Correct 24 ms 23928 KB Output is correct
16 Correct 24 ms 23928 KB Output is correct
17 Correct 24 ms 23928 KB Output is correct
18 Correct 23 ms 23928 KB Output is correct
19 Correct 23 ms 23900 KB Output is correct
20 Correct 24 ms 23800 KB Output is correct
21 Correct 23 ms 23928 KB Output is correct
22 Correct 24 ms 23800 KB Output is correct
23 Correct 23 ms 23928 KB Output is correct
24 Correct 23 ms 23800 KB Output is correct
25 Correct 23 ms 23928 KB Output is correct
26 Runtime error 55 ms 47992 KB Execution killed with signal 11 (could be triggered by violating memory limits)
27 Halted 0 ms 0 KB -