oj.uz

답안 #70268

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
70268 2018-08-22T14:24:27 Z top34051 Simurgh (IOI17_simurgh) C++17
70 / 100
 254 ms 8664 KB 
#include "simurgh.h"
#include<bits/stdc++.h>
using namespace std;

#define pii pair<int,int>
#define X first
#define Y second
const int maxn = 500 + 5;
const int maxm = 250000 + 5;

int n,m;

pii e[maxm];
int head[maxn];
int act[maxm], pos[maxm];
vector<int> tree;

vector<pii> way[maxn];
int par[maxn], come[maxn];

vector<int> path;
int rec[maxm];

int res[maxm];

int id[maxn][maxn];

int ask(int last, int id) {
    if(last==-1 || id==-1 || res[last]==-1 || res[id]==-1) {
        return count_common_roads(tree);
    }
    return rec[last] + res[last] - res[id];
}

int findhead(int x) {
	if(x==head[x]) return x;
	return head[x] = findhead(head[x]);
}

void dfs(int u, int last, int id) {
	par[u] = last; come[u] = id;
	for(auto t : way[u]) {
		int v = t.X, tid = t.Y;
		if(v==last) continue;
		dfs(v,u,tid);
	}
}

void prep(int x, int y) {
	dfs(x,-1,0);
	path.clear();
	for(int i=y;i!=x;i=par[i]) {
//		printf("%d %d : %d\n",par[i],i,come[i]);
		path.push_back(come[i]);
	}
}

vector<int> find_roads4(int N, vector<int> U, vector<int> V) {
	n = N; m = U.size();
	for(int i=0;i<m;i++) {
		int u = U[i], v = V[i];
		id[u][v] = id[v][u] = i;
	}

	vector<int> vec;
	vec.clear();
	for(int i=0;i<n-1;i++) vec.push_back(id[i][i+1]);
	int ori = count_common_roads(vec);

//	printf("ori = %d\n",ori);

	for(int u=1;u<n-1;u++) {
        vec.clear();
        vec.push_back(id[u-1][u+1]);
        for(int i=0;i<u-1;i++) vec.push_back(id[i][i+1]);
        for(int i=u+1;i<n-1;i++) vec.push_back(id[i][i+1]);
        vec.push_back(-1);
        vec[n-2] = id[u][u+1];
        int tmp1 = count_common_roads(vec);
        vec[n-2] = id[u-1][u];
        int tmp2 = count_common_roads(vec);
//        printf("\tmp1 = %d tmp2 = %d\n",tmp1,tmp2);
        if(ori - tmp1 == 1 || tmp2 - tmp1 == 1) {
//            printf("\t%d - %d = 1\n",u-1,u);
            res[id[u-1][u]] = 1;
        }
        if(ori - tmp2 == 1 || tmp1 - tmp2 == 1) {
//            printf("\t%d - %d = 1\n",u,u+1);
            res[id[u][u+1]] = 1;
        }
        if(tmp1 - ori == 1 || tmp2 - ori == 1) {
//            printf("\t%d - %d = 1\n",u-1,u+1);
            res[id[u-1][u+1]] = 1;
        }
	}

	for(int u=0;u<n;u++) {
        int sz = 0;
        int a[505];
        for(int v=0;v<n;v++) if(v!=u) a[sz++] = v;
        while(1) {
            int l = 0, r = sz-1, x, v = -1;
            while(l<=r) {
                x = (l+r)/2;
                vec.clear();
                int tmp = 0;
                for(int i=0;i<=x;i++) vec.push_back(id[u][a[i]]), tmp -= res[id[u][a[i]]];
                for(int i=x;i<sz-1;i++) vec.push_back(id[a[i]][a[i+1]]), tmp -= res[id[a[i]][a[i+1]]];
//                printf("\task : ");
//                for(auto t : vec) printf("%d ",t);
//                printf("\n");
                tmp += count_common_roads(vec);
                if(tmp >= 1) {
                    v = a[x];
                    r = x-1;
                }
                else l = x+1;
            }
            if(v==-1) break;
//            printf("%d - %d = 1\n",u,v);
            res[id[u][v]] = 1;
        }
	}
	vector<int> ans;
	for(int u=0;u<n;u++) {
        for(int v=u+1;v<n;v++) {
            if(res[id[u][v]]) ans.push_back(id[u][v]);
        }
	}
	return ans;
}

vector<int> find_roads(int N, vector<int> U, vector<int> V) {
	n = N; m = U.size();
    if(m == n*(n-1)/2) return find_roads4(N,U,V);
	for(int i=0;i<n;i++) head[i] = i;
	for(int i=0;i<m;i++) {
		int u = U[i], v = V[i];
		e[i] = {u,v};
		pos[i] = -1;
		if(findhead(u)!=findhead(v)) {
			head[findhead(u)] = findhead(v);
			pos[i] = tree.size();
			tree.push_back(i);
			way[u].push_back({v,i});
			way[v].push_back({u,i});
		}
        res[i] = -1;
	}

	int ori = ask(-1,-1);
//	printf("ori = %d\n",ori);

	for(int i=0;i<m;i++) {
		if(pos[i]!=-1) continue;
		int u = e[i].X, v = e[i].Y;
		prep(u,v);
		int last = -1;
//		printf("edge %d\n",i);
		for(auto id : path) {
			tree[pos[id]] = i;
			rec[id] = ask(last,id);
//			printf("\trec %d = %d\n",id,rec[id]);
			tree[pos[id]] = id;
			last = id;
		}

		res[i] = 0;
		for(auto id : path) {
			if(rec[id]-ori == 1) res[i] = 1;
		}
//		printf("\t\tres = %d\n",res[i]);

		for(auto id : path) {
            res[id] = ori + res[i] - rec[id];
//            printf("\t\tres %d = %d\n",id,res[id]);
		}
	}

	vector<int> vec;
	for(int i=0;i<m;i++) if(res[i]) vec.push_back(i);
//	for(auto t : vec) printf("%d ",t);
	return vec;
}

Subtask #1
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 292 KB correct
2 Correct 3 ms 356 KB correct
3 Correct 2 ms 432 KB correct
4 Correct 2 ms 468 KB correct
5 Correct 3 ms 516 KB correct
6 Correct 2 ms 596 KB correct
7 Correct 2 ms 604 KB correct
8 Correct 3 ms 632 KB correct
9 Correct 2 ms 636 KB correct
10 Correct 3 ms 640 KB correct
11 Correct 2 ms 644 KB correct
12 Correct 3 ms 648 KB correct
13 Correct 3 ms 648 KB correct

Subtask #2
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 292 KB correct
2 Correct 3 ms 356 KB correct
3 Correct 2 ms 432 KB correct
4 Correct 2 ms 468 KB correct
5 Correct 3 ms 516 KB correct
6 Correct 2 ms 596 KB correct
7 Correct 2 ms 604 KB correct
8 Correct 3 ms 632 KB correct
9 Correct 2 ms 636 KB correct
10 Correct 3 ms 640 KB correct
11 Correct 2 ms 644 KB correct
12 Correct 3 ms 648 KB correct
13 Correct 3 ms 648 KB correct
14 Correct 4 ms 784 KB correct
15 Correct 4 ms 792 KB correct
16 Correct 4 ms 800 KB correct
17 Correct 5 ms 800 KB correct
18 Correct 3 ms 800 KB correct
19 Correct 6 ms 800 KB correct
20 Correct 5 ms 800 KB correct
21 Correct 5 ms 800 KB correct
22 Correct 4 ms 800 KB correct
23 Correct 4 ms 800 KB correct
24 Correct 3 ms 800 KB correct
25 Correct 2 ms 800 KB correct
26 Correct 3 ms 800 KB correct
27 Correct 4 ms 800 KB correct
28 Correct 2 ms 800 KB correct
29 Correct 3 ms 800 KB correct
30 Correct 4 ms 800 KB correct
31 Correct 5 ms 800 KB correct
32 Correct 5 ms 800 KB correct
33 Correct 4 ms 800 KB correct

Subtask #3
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 292 KB correct
2 Correct 3 ms 356 KB correct
3 Correct 2 ms 432 KB correct
4 Correct 2 ms 468 KB correct
5 Correct 3 ms 516 KB correct
6 Correct 2 ms 596 KB correct
7 Correct 2 ms 604 KB correct
8 Correct 3 ms 632 KB correct
9 Correct 2 ms 636 KB correct
10 Correct 3 ms 640 KB correct
11 Correct 2 ms 644 KB correct
12 Correct 3 ms 648 KB correct
13 Correct 3 ms 648 KB correct
14 Correct 4 ms 784 KB correct
15 Correct 4 ms 792 KB correct
16 Correct 4 ms 800 KB correct
17 Correct 5 ms 800 KB correct
18 Correct 3 ms 800 KB correct
19 Correct 6 ms 800 KB correct
20 Correct 5 ms 800 KB correct
21 Correct 5 ms 800 KB correct
22 Correct 4 ms 800 KB correct
23 Correct 4 ms 800 KB correct
24 Correct 3 ms 800 KB correct
25 Correct 2 ms 800 KB correct
26 Correct 3 ms 800 KB correct
27 Correct 4 ms 800 KB correct
28 Correct 2 ms 800 KB correct
29 Correct 3 ms 800 KB correct
30 Correct 4 ms 800 KB correct
31 Correct 5 ms 800 KB correct
32 Correct 5 ms 800 KB correct
33 Correct 4 ms 800 KB correct
34 Correct 33 ms 2244 KB correct
35 Correct 254 ms 2244 KB correct
36 Correct 166 ms 2244 KB correct
37 Correct 12 ms 2244 KB correct
38 Correct 214 ms 2468 KB correct
39 Correct 183 ms 2500 KB correct
40 Correct 146 ms 2500 KB correct
41 Correct 40 ms 3204 KB correct
42 Correct 226 ms 3204 KB correct
43 Correct 113 ms 3204 KB correct
44 Correct 86 ms 3204 KB correct
45 Correct 99 ms 3204 KB correct
46 Correct 75 ms 3204 KB correct
47 Correct 34 ms 3204 KB correct
48 Correct 5 ms 3204 KB correct
49 Correct 11 ms 3204 KB correct
50 Correct 36 ms 3204 KB correct
51 Correct 100 ms 3208 KB correct
52 Correct 88 ms 3320 KB correct
53 Correct 74 ms 3320 KB correct
54 Correct 101 ms 3588 KB correct
55 Correct 95 ms 3672 KB correct
56 Correct 92 ms 3688 KB correct
57 Correct 95 ms 3872 KB correct

Subtask #4
19.0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 3872 KB correct
2 Correct 3 ms 3872 KB correct
3 Correct 104 ms 6388 KB correct
4 Correct 188 ms 7824 KB correct
5 Correct 205 ms 7860 KB correct
6 Correct 169 ms 7904 KB correct
7 Correct 202 ms 7904 KB correct
8 Correct 208 ms 7904 KB correct
9 Correct 217 ms 7904 KB correct
10 Correct 201 ms 7904 KB correct
11 Correct 180 ms 7904 KB correct
12 Correct 190 ms 7904 KB correct
13 Correct 2 ms 7904 KB correct
14 Correct 217 ms 7956 KB correct
15 Correct 198 ms 7956 KB correct

Subtask #5
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 292 KB correct
2 Correct 3 ms 356 KB correct
3 Correct 2 ms 432 KB correct
4 Correct 2 ms 468 KB correct
5 Correct 3 ms 516 KB correct
6 Correct 2 ms 596 KB correct
7 Correct 2 ms 604 KB correct
8 Correct 3 ms 632 KB correct
9 Correct 2 ms 636 KB correct
10 Correct 3 ms 640 KB correct
11 Correct 2 ms 644 KB correct
12 Correct 3 ms 648 KB correct
13 Correct 3 ms 648 KB correct
14 Correct 4 ms 784 KB correct
15 Correct 4 ms 792 KB correct
16 Correct 4 ms 800 KB correct
17 Correct 5 ms 800 KB correct
18 Correct 3 ms 800 KB correct
19 Correct 6 ms 800 KB correct
20 Correct 5 ms 800 KB correct
21 Correct 5 ms 800 KB correct
22 Correct 4 ms 800 KB correct
23 Correct 4 ms 800 KB correct
24 Correct 3 ms 800 KB correct
25 Correct 2 ms 800 KB correct
26 Correct 3 ms 800 KB correct
27 Correct 4 ms 800 KB correct
28 Correct 2 ms 800 KB correct
29 Correct 3 ms 800 KB correct
30 Correct 4 ms 800 KB correct
31 Correct 5 ms 800 KB correct
32 Correct 5 ms 800 KB correct
33 Correct 4 ms 800 KB correct
34 Correct 33 ms 2244 KB correct
35 Correct 254 ms 2244 KB correct
36 Correct 166 ms 2244 KB correct
37 Correct 12 ms 2244 KB correct
38 Correct 214 ms 2468 KB correct
39 Correct 183 ms 2500 KB correct
40 Correct 146 ms 2500 KB correct
41 Correct 40 ms 3204 KB correct
42 Correct 226 ms 3204 KB correct
43 Correct 113 ms 3204 KB correct
44 Correct 86 ms 3204 KB correct
45 Correct 99 ms 3204 KB correct
46 Correct 75 ms 3204 KB correct
47 Correct 34 ms 3204 KB correct
48 Correct 5 ms 3204 KB correct
49 Correct 11 ms 3204 KB correct
50 Correct 36 ms 3204 KB correct
51 Correct 100 ms 3208 KB correct
52 Correct 88 ms 3320 KB correct
53 Correct 74 ms 3320 KB correct
54 Correct 101 ms 3588 KB correct
55 Correct 95 ms 3672 KB correct
56 Correct 92 ms 3688 KB correct
57 Correct 95 ms 3872 KB correct
58 Correct 2 ms 3872 KB correct
59 Correct 3 ms 3872 KB correct
60 Correct 104 ms 6388 KB correct
61 Correct 188 ms 7824 KB correct
62 Correct 205 ms 7860 KB correct
63 Correct 169 ms 7904 KB correct
64 Correct 202 ms 7904 KB correct
65 Correct 208 ms 7904 KB correct
66 Correct 217 ms 7904 KB correct
67 Correct 201 ms 7904 KB correct
68 Correct 180 ms 7904 KB correct
69 Correct 190 ms 7904 KB correct
70 Correct 2 ms 7904 KB correct
71 Correct 217 ms 7956 KB correct
72 Correct 198 ms 7956 KB correct
73 Correct 3 ms 7956 KB correct
74 Incorrect 153 ms 8664 KB WA in grader: NO
75 Halted 0 ms 0 KB -