oj.uz

Submission #520441

# Submission time Handle Problem Language Result Execution time Memory
520441 2022-01-30T02:10:19 Z ComPhyPark Simurgh (IOI17_simurgh) C++14
100 / 100
 146 ms 6048 KB 
#include "simurgh.h"
#include<utility>
#include<queue>
#include<algorithm>
#define x first
#define y second
#define pi pair<int,int>
using namespace std;
vector<vector<pi>>l;
vector<int>mm;
int vs[505], p[505], pl[505], up[505], cs[505], T = 1;
void dfs(int n, int p) {
	::p[n] = p;
	vs[n] = T++;
	for (pi e : l[n]) {
		if (e.x == p) {
			pl[n] = e.y;
		}
		if (vs[e.x] == 0)dfs(e.x, n);
	}
}
int f(int n) {
	if (n == up[n])return n;
	return up[n] = f(up[n]);
}
void un(int a, int b) {
	a = f(a);
	b = f(b);
	up[a] = b;
}
vector<int> find_roads(int n, vector<int>u, vector<int>v) {
	int i, j, r, m = v.size(), k, nn, ln;
	vector<int>qv;
	mm.resize(m, -1);
	l.resize(n);
	while (m--) {
		l[u[m]].push_back({ v[m],m });
		l[v[m]].push_back({ u[m],m });
	}
	m = u.size();
	dfs(0, -1);
	for (i = 1; i < n; i++)qv.push_back(pl[i]);
	k = count_common_roads(qv);
	//printf("##%d##\n", k);
	for (i = 1; i < n; i++) {
		//for (j = 0; j < m; j++)printf("%d ", mm[j]);
		//printf("\n");
		nn = ln = p[i];
		for (pi e : l[i]) {
			if (vs[e.x] < vs[nn]) {
				nn = e.x;
				ln = e.y;
			}
		}
		//printf("%d %d\n", i, p[i]);
		if (nn == p[i])continue;
		//printf("%d [%d,%d]\n", i, nn, ln);
		int b = 0, c = 1;
		for (j = i; j != nn; j = p[j]) {
			r = pl[j];
			if (mm[r] >= 0)continue;
			c = 0;
			qv.clear();
			qv.push_back(ln);
			for (int ii = 1; ii < n; ii++)if (pl[ii] != r)qv.push_back(pl[ii]);
			mm[r] = 3 + count_common_roads(qv) - k;//3+that road-this road
			if (mm[r] != 3)b = mm[r] - 3;
		}
		if (c)continue;
		if (b == 1) {
			//printf("Case 1\n");
			for (j = i; j != nn; j = p[j]) {
				r = pl[j];
				if (mm[r] > 1) {
					mm[r] = 4 - mm[r];
				}
			}
		}
		else if (b == -1) {
			//printf("Case 2\n");
			for (j = i; j != nn; j = p[j]) {
				r = pl[j];
				if (mm[r] > 1) {
					mm[r] = 3 - mm[r];
				}
			}
		}
		else {
			//printf("Case 3\n");
			int K = -1;
			for (j = i; j != nn; j = p[j]) {
				r = pl[j];
				if (mm[r] < 2) {
					qv.clear();
					qv.push_back(ln);
					for (int ii = 1; ii < n; ii++)if (pl[ii] != r)qv.push_back(pl[ii]);
					K = count_common_roads(qv) - k + mm[r];
					break;
				}
			}
			//printf("[%d]", K);
			if (K < 0) {
				//printf("ALL FIRST\n");
				for (j = i; j != nn; j = p[j]) {
					r = pl[j];
					mm[r] = 0;
				}
			}
			else {
				//printf("PAST EXISTS\n");
				for (j = i; j != nn; j = p[j]) {
					r = pl[j];
					if (mm[r] < 2)continue;
					mm[r] = K;
				}
			}
		}
	}
	//for (j = 0; j < m; j++)printf("%d ", mm[j]);
	//printf("\n");
	for (i = 1; i < n; i++) {
		if (mm[pl[i]] < 0)mm[pl[i]] = 1;
	}
	//for (j = 0; j < m; j++)printf("%d ", mm[j]);
	//printf("\n");
	queue<int>q;
	for (i = 0; i < n; i++) {
		for (j = 0; j < n; j++)up[j] = j;
		qv.clear();
		for (pi e : l[i]) {
			qv.push_back(e.y);
			un(e.x, i);
		}
		k = 0;
		for (j = 1; j < n; j++) {
			if (f(j) != f(p[j])) {
				un(j, p[j]);
				qv.push_back(pl[j]);
				k += mm[pl[j]];
			}
		}
		cs[i] = count_common_roads(qv) - k;
		if (cs[i] == 1)q.push(i);
	}
	//for (i = 0; i < n; i++)printf("%d ", cs[i]);
	//printf("\n");
	//m = u.size();
	//for (i = 0; i < m; i++)printf("%d ", mm[i]);
	//printf("\n");
	vector<pi>vv;
	while (q.size()) {
		i = q.front();
		q.pop();
		//printf("Test: %d\n", i);
		if (cs[i] != 1)continue;
		//printf("Yeah\n");
		vv.clear();
		for (pi e : l[i]) {
			if (cs[e.x])vv.push_back(e);
		}
		while (vv.size() > 1) {
			//printf("[ ");
			//for (pi e : vv)printf("%d ", e.y);
			//printf("]\n");
			for (j = 0; j < n; j++)up[j] = j;
			qv.clear();
			for (j = 0; j < vv.size() / 2; j++) {
				qv.push_back(vv[j].y);
				un(vv[j].x, i);
			}
			k = 0;
			for (j = 1; j < n; j++) {
				if (f(j) != f(p[j])) {
					un(j, p[j]);
					qv.push_back(pl[j]);
					k += mm[pl[j]];
				}
			}
			//printf("%d %d\n", k, count_common_roads(qv));
			if (count_common_roads(qv) == k) {
				vv.erase(vv.begin(), vv.begin() + (vv.size() / 2));
			}
			else {
				vv.erase(vv.begin() + (vv.size() / 2), vv.end());
			}
		}
		//printf("[ ");
		//for (pi e : vv)printf("%d ", e.y);
		//printf("]\n");
		for (pi e : l[i]) {
			if (e.x == vv[0].x) {
				mm[e.y] = 1;
				cs[e.x]--;
				if (cs[e.x] == 1)q.push(e.x);
			}
			else if (mm[e.y] == -1) {
				mm[e.y] = 0;
			}
		}
		cs[i] = 0;
	}
	m = u.size();
	//for (i = 0; i < m; i++)printf("%d ", mm[i]);
	//printf("\n");
	vector<int>ans;
	for (i = 0; i < m; i++) {
		if (mm[i] == 1)ans.push_back(i);
	}
	return ans;
}

Compilation message

simurgh.cpp: In function 'std::vector<int> find_roads(int, std::vector<int>, std::vector<int>)':
simurgh.cpp:167:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  167 |    for (j = 0; j < vv.size() / 2; j++) {
      |                ~~^~~~~~~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB correct
2 Correct 0 ms 204 KB correct
3 Correct 0 ms 288 KB correct
4 Correct 0 ms 204 KB correct
5 Correct 1 ms 288 KB correct
6 Correct 0 ms 204 KB correct
7 Correct 0 ms 204 KB correct
8 Correct 1 ms 204 KB correct
9 Correct 0 ms 204 KB correct
10 Correct 1 ms 204 KB correct
11 Correct 1 ms 204 KB correct
12 Correct 1 ms 204 KB correct
13 Correct 1 ms 204 KB correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB correct
2 Correct 0 ms 204 KB correct
3 Correct 0 ms 288 KB correct
4 Correct 0 ms 204 KB correct
5 Correct 1 ms 288 KB correct
6 Correct 0 ms 204 KB correct
7 Correct 0 ms 204 KB correct
8 Correct 1 ms 204 KB correct
9 Correct 0 ms 204 KB correct
10 Correct 1 ms 204 KB correct
11 Correct 1 ms 204 KB correct
12 Correct 1 ms 204 KB correct
13 Correct 1 ms 204 KB correct
14 Correct 1 ms 356 KB correct
15 Correct 1 ms 336 KB correct
16 Correct 1 ms 292 KB correct
17 Correct 1 ms 296 KB correct
18 Correct 1 ms 208 KB correct
19 Correct 2 ms 336 KB correct
20 Correct 1 ms 336 KB correct
21 Correct 1 ms 336 KB correct
22 Correct 1 ms 336 KB correct
23 Correct 1 ms 208 KB correct
24 Correct 1 ms 208 KB correct
25 Correct 1 ms 292 KB correct
26 Correct 1 ms 208 KB correct
27 Correct 1 ms 208 KB correct
28 Correct 1 ms 208 KB correct
29 Correct 1 ms 208 KB correct
30 Correct 1 ms 284 KB correct
31 Correct 1 ms 292 KB correct
32 Correct 1 ms 336 KB correct
33 Correct 1 ms 208 KB correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB correct
2 Correct 0 ms 204 KB correct
3 Correct 0 ms 288 KB correct
4 Correct 0 ms 204 KB correct
5 Correct 1 ms 288 KB correct
6 Correct 0 ms 204 KB correct
7 Correct 0 ms 204 KB correct
8 Correct 1 ms 204 KB correct
9 Correct 0 ms 204 KB correct
10 Correct 1 ms 204 KB correct
11 Correct 1 ms 204 KB correct
12 Correct 1 ms 204 KB correct
13 Correct 1 ms 204 KB correct
14 Correct 1 ms 356 KB correct
15 Correct 1 ms 336 KB correct
16 Correct 1 ms 292 KB correct
17 Correct 1 ms 296 KB correct
18 Correct 1 ms 208 KB correct
19 Correct 2 ms 336 KB correct
20 Correct 1 ms 336 KB correct
21 Correct 1 ms 336 KB correct
22 Correct 1 ms 336 KB correct
23 Correct 1 ms 208 KB correct
24 Correct 1 ms 208 KB correct
25 Correct 1 ms 292 KB correct
26 Correct 1 ms 208 KB correct
27 Correct 1 ms 208 KB correct
28 Correct 1 ms 208 KB correct
29 Correct 1 ms 208 KB correct
30 Correct 1 ms 284 KB correct
31 Correct 1 ms 292 KB correct
32 Correct 1 ms 336 KB correct
33 Correct 1 ms 208 KB correct
34 Correct 26 ms 1616 KB correct
35 Correct 25 ms 1596 KB correct
36 Correct 23 ms 1324 KB correct
37 Correct 8 ms 336 KB correct
38 Correct 28 ms 1628 KB correct
39 Correct 25 ms 1412 KB correct
40 Correct 22 ms 1360 KB correct
41 Correct 28 ms 1616 KB correct
42 Correct 25 ms 1616 KB correct
43 Correct 19 ms 1104 KB correct
44 Correct 17 ms 848 KB correct
45 Correct 19 ms 848 KB correct
46 Correct 16 ms 856 KB correct
47 Correct 12 ms 560 KB correct
48 Correct 4 ms 208 KB correct
49 Correct 9 ms 336 KB correct
50 Correct 12 ms 464 KB correct
51 Correct 19 ms 968 KB correct
52 Correct 18 ms 848 KB correct
53 Correct 17 ms 848 KB correct
54 Correct 19 ms 1104 KB correct
55 Correct 19 ms 976 KB correct
56 Correct 20 ms 976 KB correct
57 Correct 20 ms 976 KB correct

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB correct
2 Correct 0 ms 204 KB correct
3 Correct 76 ms 4312 KB correct
4 Correct 126 ms 6048 KB correct
5 Correct 138 ms 5984 KB correct
6 Correct 120 ms 5960 KB correct
7 Correct 116 ms 5960 KB correct
8 Correct 132 ms 6028 KB correct
9 Correct 122 ms 5980 KB correct
10 Correct 134 ms 5960 KB correct
11 Correct 122 ms 5976 KB correct
12 Correct 133 ms 5960 KB correct
13 Correct 0 ms 208 KB correct
14 Correct 128 ms 5924 KB correct
15 Correct 120 ms 5988 KB correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB correct
2 Correct 0 ms 204 KB correct
3 Correct 0 ms 288 KB correct
4 Correct 0 ms 204 KB correct
5 Correct 1 ms 288 KB correct
6 Correct 0 ms 204 KB correct
7 Correct 0 ms 204 KB correct
8 Correct 1 ms 204 KB correct
9 Correct 0 ms 204 KB correct
10 Correct 1 ms 204 KB correct
11 Correct 1 ms 204 KB correct
12 Correct 1 ms 204 KB correct
13 Correct 1 ms 204 KB correct
14 Correct 1 ms 356 KB correct
15 Correct 1 ms 336 KB correct
16 Correct 1 ms 292 KB correct
17 Correct 1 ms 296 KB correct
18 Correct 1 ms 208 KB correct
19 Correct 2 ms 336 KB correct
20 Correct 1 ms 336 KB correct
21 Correct 1 ms 336 KB correct
22 Correct 1 ms 336 KB correct
23 Correct 1 ms 208 KB correct
24 Correct 1 ms 208 KB correct
25 Correct 1 ms 292 KB correct
26 Correct 1 ms 208 KB correct
27 Correct 1 ms 208 KB correct
28 Correct 1 ms 208 KB correct
29 Correct 1 ms 208 KB correct
30 Correct 1 ms 284 KB correct
31 Correct 1 ms 292 KB correct
32 Correct 1 ms 336 KB correct
33 Correct 1 ms 208 KB correct
34 Correct 26 ms 1616 KB correct
35 Correct 25 ms 1596 KB correct
36 Correct 23 ms 1324 KB correct
37 Correct 8 ms 336 KB correct
38 Correct 28 ms 1628 KB correct
39 Correct 25 ms 1412 KB correct
40 Correct 22 ms 1360 KB correct
41 Correct 28 ms 1616 KB correct
42 Correct 25 ms 1616 KB correct
43 Correct 19 ms 1104 KB correct
44 Correct 17 ms 848 KB correct
45 Correct 19 ms 848 KB correct
46 Correct 16 ms 856 KB correct
47 Correct 12 ms 560 KB correct
48 Correct 4 ms 208 KB correct
49 Correct 9 ms 336 KB correct
50 Correct 12 ms 464 KB correct
51 Correct 19 ms 968 KB correct
52 Correct 18 ms 848 KB correct
53 Correct 17 ms 848 KB correct
54 Correct 19 ms 1104 KB correct
55 Correct 19 ms 976 KB correct
56 Correct 20 ms 976 KB correct
57 Correct 20 ms 976 KB correct
58 Correct 1 ms 204 KB correct
59 Correct 0 ms 204 KB correct
60 Correct 76 ms 4312 KB correct
61 Correct 126 ms 6048 KB correct
62 Correct 138 ms 5984 KB correct
63 Correct 120 ms 5960 KB correct
64 Correct 116 ms 5960 KB correct
65 Correct 132 ms 6028 KB correct
66 Correct 122 ms 5980 KB correct
67 Correct 134 ms 5960 KB correct
68 Correct 122 ms 5976 KB correct
69 Correct 133 ms 5960 KB correct
70 Correct 0 ms 208 KB correct
71 Correct 128 ms 5924 KB correct
72 Correct 120 ms 5988 KB correct
73 Correct 1 ms 208 KB correct
74 Correct 130 ms 6004 KB correct
75 Correct 133 ms 5856 KB correct
76 Correct 66 ms 2368 KB correct
77 Correct 131 ms 5976 KB correct
78 Correct 124 ms 5972 KB correct
79 Correct 131 ms 5956 KB correct
80 Correct 146 ms 5832 KB correct
81 Correct 115 ms 5376 KB correct
82 Correct 123 ms 5880 KB correct
83 Correct 99 ms 3460 KB correct
84 Correct 98 ms 4016 KB correct
85 Correct 93 ms 3928 KB correct
86 Correct 82 ms 2520 KB correct
87 Correct 69 ms 2196 KB correct
88 Correct 66 ms 1564 KB correct
89 Correct 62 ms 1456 KB correct
90 Correct 59 ms 1320 KB correct
91 Correct 27 ms 464 KB correct
92 Correct 16 ms 304 KB correct
93 Correct 98 ms 3828 KB correct
94 Correct 81 ms 2512 KB correct
95 Correct 83 ms 2616 KB correct
96 Correct 62 ms 1456 KB correct
97 Correct 68 ms 1560 KB correct
98 Correct 70 ms 2128 KB correct
99 Correct 65 ms 1564 KB correct
100 Correct 40 ms 560 KB correct
101 Correct 17 ms 384 KB correct
102 Correct 96 ms 3196 KB correct
103 Correct 93 ms 3196 KB correct
104 Correct 92 ms 3172 KB correct
105 Correct 94 ms 3276 KB correct