답안 #11560 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
11560	2014-12-01T15:23:46 Z	tncks0121	전선 연결하기 (GA9_wire)	C++14	100 / 100	696 ms	42596 KB

wire

#define _CRT_SECURE_NO_WARNINGS

#include <stdio.h>
#include <stack>
#include <memory.h>
#include <assert.h>
#include <stdlib.h>
#include <algorithm>
#include <set>
#include <queue>
#include <functional>

using namespace std;

void IMPOSSIBLE() {
    puts("IMPOSSIBLE");
    exit(0);
}


const int N_ = 300500;
const int LEAF = 1<<20;
const int TSZ = LEAF + LEAF + 3;

int N, A[N_ + N_];
bool used[N_];
int L[N_], R[N_];

struct segtree {
    int tree[TSZ];
    int type;
    
    segtree (int type): type(type) {
        if(type == 1) fill(tree, tree + TSZ, -987654321);
        if(type == 2) fill(tree, tree + TSZ, +987654321);
        if(type == 3) fill(tree, tree + TSZ, 0);
    }
    
    int func (int a, int b) {
        switch(type) {
            case 1: return max(a, b);
            case 2: return min(a, b);
            case 3: return a + b;
        }
        return -1;
    }
    
    void update (int pos, int val) {
        tree[pos += LEAF] = val;
        while(pos >>= 1) tree[pos] = func(tree[pos+pos], tree[pos+pos+1]);
    }
    
    int query (int l, int r) {
        int ret = -1987654321;
        bool wr = false;
        l += LEAF; r += LEAF;
        while(l <= r) {
            if((l & 1) == 1) ret = wr ? func(ret, tree[l]) : tree[l], wr = true;
            if((r & 1) == 0) ret = wr ? func(ret, tree[r]) : tree[r], wr = true;
            l = (l + 1) >> 1;
            r = (r - 1) >> 1;
        }
        return ret;
    }
    
    // for type 3
    int kth (int k) {
        if(type != 3) return -1;
        int nd = 1;
        while(nd < LEAF) {
            if(tree[nd + nd] <= k) {
                nd = nd + nd;
            }else {
                k -= tree[nd + nd];
                nd = nd + nd + 1;
            }
        }
        return nd - LEAF;
    }
};

segtree tree1(1), tree2(2), tree3(3);

/*
        1
    2       3
  4   5   6   7
 8 9 0 1 2 3 4 5
 
 
        2
    1       1
  1   0   1   0
 0 1 0 0 0 1 0 0
 */

queue<int> cand, que;
vector<int> inside[N_];
stack<int> stk;

int res[N_ + N_];

void que_push(int v, int r = 1) {
    if (used[v]) return;
    que.push(v); res[v] = r; used[v] = true;
    tree1.update (L[v], -987654321);
    tree2.update (R[v], +987654321);
}

int main() {
    //freopen("input.txt", "r", stdin);
    //freopen("output.txt", "w", stdout);
    
    scanf("%d", &N);
    for(int i = 1; i <= N+N; i++) {
        scanf("%d", A+i);
        if(L[A[i]] == 0) L[A[i]] = i; else R[A[i]] = i;
    }
    
    for(int i = 1; i <= N; i++) {
        tree1.update (L[i], R[i]);
        tree2.update (R[i], L[i]);
    }
    
    for(int i = 1; i <= N+N; i++) {
        int a = A[i];
        if(L[a] == i) {
            int t = tree3.query(1, R[a]);
            if(tree3.tree[1] == t) cand.push(a);
            else inside[A[tree3.kth (t + 1)]].push_back(a);
            tree3.update (R[a], 0);
        }else {
            tree3.update (R[a], 1);
        }
    }
    
    int cnt = 0;
    while (cnt < N) {
        que_push(cand.front()); cand.pop();
        while (!que.empty()) {
            int u = que.front(); que.pop(); ++cnt;
            
            // 1. L[x] < L[u] < R[x] < R[u]
            for (int r; (r = tree1.query(1, L[u])) > 0;) {
                if (r < L[u]) break;
                que_push(A[r], 3 - res[u]);
            }
            
            // 2. L[u] < L[x] < R[u] < R[x]
            for (int l; (l = tree2.query(R[u], N + N)) <= N + N;) {
                if (R[u] < l) break;
                que_push(A[l], 3 - res[u]);
            }
            
            for (int i = 0; i < inside[u].size(); i++) {
                cand.push(inside[u][i]);
            }
        }
    }
    
    for (int cur = 1; cur <= 2; cur++) {
        memset(used, 0, sizeof used);
        while (!stk.empty()) stk.pop();
        
        for (int i = 1; i <= N + N; i++) if (res[A[i]] == cur) {
            if (!used[A[i]]) {
                used[A[i]] = true;
                stk.push(A[i]);
            }
            else {
                if (stk.top() != A[i]) IMPOSSIBLE();
                stk.pop();
            }
        }
    }
    
    for (int i = 1; i <= N + N; i++) printf("%c", res[A[i]] == 1 ? '^' : 'v');
    return 0;
}

Subtask #1
9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	8 ms	40200 KB	Output is correct
2	Correct	4 ms	40200 KB	Output is correct
3	Correct	8 ms	40200 KB	Output is correct
4	Correct	12 ms	40200 KB	Output is correct
5	Correct	8 ms	40200 KB	Output is correct
6	Correct	4 ms	40200 KB	Output is correct
7	Correct	8 ms	40200 KB	Output is correct
8	Correct	0 ms	40200 KB	Output is correct
9	Correct	12 ms	40200 KB	Output is correct
10	Correct	8 ms	40200 KB	Output is correct
11	Correct	4 ms	40200 KB	Output is correct
12	Correct	8 ms	40200 KB	Output is correct
13	Correct	0 ms	40200 KB	Output is correct
14	Correct	4 ms	40200 KB	Output is correct
15	Correct	4 ms	40200 KB	Output is correct
16	Correct	4 ms	40200 KB	Output is correct
17	Correct	0 ms	40200 KB	Output is correct
18	Correct	4 ms	40200 KB	Output is correct
19	Correct	0 ms	40200 KB	Output is correct
20	Correct	0 ms	40200 KB	Output is correct
21	Correct	8 ms	40200 KB	Output is correct
22	Correct	4 ms	40200 KB	Output is correct
23	Correct	0 ms	40200 KB	Output is correct
24	Correct	4 ms	40200 KB	Output is correct
25	Correct	4 ms	40200 KB	Output is correct
26	Correct	0 ms	40200 KB	Output is correct
27	Correct	0 ms	40200 KB	Output is correct
28	Correct	8 ms	40200 KB	Output is correct
29	Correct	12 ms	40200 KB	Output is correct
30	Correct	4 ms	40200 KB	Output is correct
31	Correct	8 ms	40200 KB	Output is correct
32	Correct	8 ms	40200 KB	Output is correct
33	Correct	4 ms	40200 KB	Output is correct
34	Correct	4 ms	40200 KB	Output is correct
35	Correct	0 ms	40200 KB	Output is correct

Subtask #2
15.0 / 15.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	40200 KB	Output is correct
2	Correct	4 ms	40200 KB	Output is correct
3	Correct	4 ms	40200 KB	Output is correct
4	Correct	8 ms	40200 KB	Output is correct
5	Correct	0 ms	40200 KB	Output is correct
6	Correct	4 ms	40200 KB	Output is correct
7	Correct	0 ms	40200 KB	Output is correct
8	Correct	4 ms	40200 KB	Output is correct
9	Correct	0 ms	40200 KB	Output is correct
10	Correct	0 ms	40200 KB	Output is correct
11	Correct	0 ms	40200 KB	Output is correct
12	Correct	12 ms	40200 KB	Output is correct
13	Correct	0 ms	40200 KB	Output is correct
14	Correct	0 ms	40200 KB	Output is correct
15	Correct	4 ms	40200 KB	Output is correct
16	Correct	4 ms	40200 KB	Output is correct
17	Correct	4 ms	40200 KB	Output is correct
18	Correct	0 ms	40200 KB	Output is correct
19	Correct	0 ms	40200 KB	Output is correct
20	Correct	0 ms	40200 KB	Output is correct
21	Correct	4 ms	40200 KB	Output is correct
22	Correct	12 ms	40200 KB	Output is correct

Subtask #3
37.0 / 37.0

#	결과	실행 시간	메모리	Grader output
1	Correct	28 ms	40200 KB	Output is correct
2	Correct	24 ms	40200 KB	Output is correct
3	Correct	88 ms	40592 KB	Output is correct
4	Correct	132 ms	40464 KB	Output is correct
5	Correct	108 ms	40464 KB	Output is correct
6	Correct	84 ms	40332 KB	Output is correct
7	Correct	136 ms	40464 KB	Output is correct
8	Correct	20 ms	40200 KB	Output is correct
9	Correct	20 ms	40200 KB	Output is correct
10	Correct	96 ms	40464 KB	Output is correct
11	Correct	92 ms	40464 KB	Output is correct
12	Correct	104 ms	40332 KB	Output is correct
13	Correct	100 ms	40460 KB	Output is correct
14	Correct	108 ms	40464 KB	Output is correct
15	Correct	128 ms	40464 KB	Output is correct
16	Correct	28 ms	40200 KB	Output is correct
17	Correct	32 ms	40200 KB	Output is correct
18	Correct	88 ms	40592 KB	Output is correct
19	Correct	100 ms	40464 KB	Output is correct
20	Correct	168 ms	40596 KB	Output is correct
21	Correct	144 ms	40464 KB	Output is correct
22	Correct	144 ms	40464 KB	Output is correct
23	Correct	160 ms	40596 KB	Output is correct
24	Correct	196 ms	40596 KB	Output is correct
25	Correct	188 ms	40596 KB	Output is correct
26	Correct	176 ms	40596 KB	Output is correct
27	Correct	176 ms	40992 KB	Output is correct
28	Correct	164 ms	40992 KB	Output is correct
29	Correct	160 ms	40992 KB	Output is correct
30	Correct	172 ms	40992 KB	Output is correct

Subtask #4
39.0 / 39.0

#	결과	실행 시간	메모리	Grader output
1	Correct	296 ms	40860 KB	Output is correct
2	Correct	436 ms	41120 KB	Output is correct
3	Correct	304 ms	40860 KB	Output is correct
4	Correct	424 ms	40992 KB	Output is correct
5	Correct	464 ms	41144 KB	Output is correct
6	Correct	640 ms	41536 KB	Output is correct
7	Correct	676 ms	41540 KB	Output is correct
8	Correct	524 ms	41144 KB	Output is correct
9	Correct	336 ms	40860 KB	Output is correct
10	Correct	332 ms	40992 KB	Output is correct
11	Correct	444 ms	41144 KB	Output is correct
12	Correct	340 ms	40860 KB	Output is correct
13	Correct	680 ms	41540 KB	Output is correct
14	Correct	588 ms	41408 KB	Output is correct
15	Correct	320 ms	40992 KB	Output is correct
16	Correct	316 ms	40860 KB	Output is correct
17	Correct	344 ms	40860 KB	Output is correct
18	Correct	324 ms	40860 KB	Output is correct
19	Correct	496 ms	41144 KB	Output is correct
20	Correct	696 ms	41540 KB	Output is correct
21	Correct	656 ms	41408 KB	Output is correct
22	Correct	588 ms	42596 KB	Output is correct
23	Correct	624 ms	42596 KB	Output is correct
24	Correct	620 ms	42596 KB	Output is correct
25	Correct	624 ms	42596 KB	Output is correct

답안 #11560

Compilation message

Subtask #1 9.0 / 9.0

Subtask #2 15.0 / 15.0

Subtask #3 37.0 / 37.0

Subtask #4 39.0 / 39.0

Subtask #1
9.0 / 9.0

Subtask #2
15.0 / 15.0

Subtask #3
37.0 / 37.0

Subtask #4
39.0 / 39.0