oj.uz

Submission #61040

# Submission time Handle Problem Language Result Execution time Memory
61040 2018-07-25T06:35:40 Z tugushka Simurgh (IOI17_simurgh) C++14
30 / 100
 3000 ms 4336 KB 
#include "simurgh.h"
#include<bits/stdc++.h>
#define mp make_pair
#define pb push_back
using namespace std;
 
typedef pair < int, int > pii;
 
vector < int > cyc, exc;
int nn, mm, p[255], d[255], cyc_len, id[255][255], gold[255][255], st;
bool v[255][255];
 
void find_cycle(){
	cyc.clear();
	memset( p, -1, sizeof(p) );
	memset( d, -1, sizeof(d) );
	queue < int > q;
	q.push(st);
	d[st] = 0;
	int dep = 0, t1 = -1, t2, c;
	while( !q.empty() ){
		int sz = q.size();
		dep++;
		while(sz--){
			int u = q.front();
//			cout << u << ' ' << d[u] << ' ' << p[u] << endl;
			q.pop();
			for(int it = 0 ; it < nn ; it++){
				if( !v[u][it] ) continue;
				
				if( p[u] == it ) continue;
//				cout << u << " --> " << *it << endl;
				if( d[it] == -1 ){
					p[it] = u;
					d[it] = dep;
					q.push(it);
				}
				else{
					t1 = it;
					t2 = u;
					
//					cout << "Tails : " << t1 << ' ' << t2 << endl;
					
					break;
				}
			}
			if( t1 != -1 ) break;
		}
		if( t1 != -1 ) break;
	}
	
	vector < int > cw, ccw;
	while( t1 != t2 ){
		if( d[t1] < d[t2] ) ccw.pb(t2), t2 = p[t2];
		else if( d[t1] > d[t2] ) cw.pb(t1), t1 = p[t1];
		else ccw.pb(t2), cw.pb(t1), t2 = p[t2], t1 = p[t1];
	}
	
	cyc.pb(t1);
	for(int i = ccw.size()-1 ; i >= 0 ; i--) cyc.pb(ccw[i]);
	for(int i = 0 ; i < cw.size() ; i++) cyc.pb(cw[i]);
	cyc_len = cyc.size();
	cyc.pb(t1);
	
	st = t1;
	
//	cout << "Found\n";
//	for(int i = 0 ; i < cyc.size() ; i++) cout << cyc[i] << ' '; cout << endl;
 
}
 
void eval(){
	exc.clear();
	memset(p, -1, sizeof(p));
	queue < int > q;
	for(int i = 0 ; i < cyc.size() ; i++) q.push(cyc[i]), p[cyc[i]] = cyc[i];
	while( !q.empty() ){
		int u = q.front();
		q.pop();
		for( int it = 0 ; it < nn ; it++ ){
			if( !v[u][it] ) continue;
			
			if( p[it] == -1 ){
				p[it] = u;
//				cout << "Excess : " << u << ' ' << it << endl;
				exc.pb( id[u][it] );
				q.push(it);
			}
		}
	}
}
 
vector<int> find_roads(int _n, vector<int> _u, vector<int> _v) {
	memset( id, -1, sizeof(id) );
	memset( gold, -1, sizeof(gold) );
	nn = _n;
	mm = _u.size();
	for(int i = 0 ; i < mm ; i++){
		v[_u[i]][_v[i]] = v[_v[i]][_u[i]] = 1;
		
		id[_u[i]][_v[i]] = id[_v[i]][_u[i]] = i;
	}
	
	while( mm >= nn ){
		find_cycle();
		eval();
		
		vector < int > now;
		for(int i = 0 ; i < cyc_len ; i++){
			if( gold[cyc[i]][cyc[i+1]] != -1 ) {
				now.pb(-1);
//				cout << "Gold" << ' ' << cyc[i] << ' ' << cyc[i+1] << endl;
				continue;
			}
			
			vector < int > query;
			for(int j = 0 ; j < exc.size() ; j++) query.pb(exc[j]);
			for(int j = 0 ; j < cyc_len ; j++){
				if( i == j ) continue;
				query.pb( id[cyc[j]][cyc[j+1]] );
			}
			
			now.pb( count_common_roads(query) );
			
//			cout << "Query : "; for(int i = 0 ; i < query.size() ; i++) cout << query[i] << ' ';
//			cout << endl << now.back() << endl;
		}
 
		int _mn = 1e9, _mx = -1e9;		
		for(int i = 0 ; i < cyc_len ; i++){
			if( now[i] != -1 ) {
				_mn = min( _mn, now[i] );
				_mx = max( _mx, now[i] );
			}
		}
		
//		cout << _mn << ' ' << _mx << endl;
		
		if( _mn == _mx ){
			
			for(int i = 0 ; i < cyc_len ; i++){
				if( now[i] == -1 ) continue;
				v[ cyc[i] ][ cyc[i+1] ] = v[ cyc[i+1] ][ cyc[i] ] = 0;
				mm--;
			}
			
			continue;
		}
		else{
			for(int i = 0 ; i < cyc_len ; i++){
				if( now[i] == -1 ) continue;
				if( now[i] == _mn ){
					gold[cyc[i]][cyc[i+1]] = gold[cyc[i+1]][cyc[i]] = 1;
				}
				else{
					v[ cyc[i] ][ cyc[i+1] ] = v[ cyc[i+1] ][ cyc[i] ] = 0;
					mm--;
				}
			}
		}
	}
	
	
	vector < int > res;
	for(int i = 0 ; i < nn ; i++){
		for(int it = 0 ; it < i ; it++){
			if( v[i][it] ) res.pb( id[it][i] );
		}
	}
	
//	for(int i = 0 ; i < res.size() ; i++) cout << res[i] << ' ';
	
	return res;
}

Compilation message

simurgh.cpp: In function 'void find_cycle()':
simurgh.cpp:61:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0 ; i < cw.size() ; i++) cyc.pb(cw[i]);
                  ~~^~~~~~~~~~~
simurgh.cpp:20:28: warning: unused variable 'c' [-Wunused-variable]
  int dep = 0, t1 = -1, t2, c;
                            ^
simurgh.cpp: In function 'void eval()':
simurgh.cpp:76:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0 ; i < cyc.size() ; i++) q.push(cyc[i]), p[cyc[i]] = cyc[i];
                  ~~^~~~~~~~~~~~
simurgh.cpp: In function 'std::vector<int> find_roads(int, std::vector<int>, std::vector<int>)':
simurgh.cpp:117:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int j = 0 ; j < exc.size() ; j++) query.pb(exc[j]);
                    ~~^~~~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 888 KB correct
2 Correct 3 ms 888 KB correct
3 Correct 3 ms 1076 KB correct
4 Correct 3 ms 1128 KB correct
5 Correct 3 ms 1128 KB correct
6 Correct 4 ms 1128 KB correct
7 Correct 3 ms 1128 KB correct
8 Correct 3 ms 1128 KB correct
9 Correct 3 ms 1128 KB correct
10 Correct 3 ms 1128 KB correct
11 Correct 3 ms 1128 KB correct
12 Correct 3 ms 1128 KB correct
13 Correct 4 ms 1128 KB correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 888 KB correct
2 Correct 3 ms 888 KB correct
3 Correct 3 ms 1076 KB correct
4 Correct 3 ms 1128 KB correct
5 Correct 3 ms 1128 KB correct
6 Correct 4 ms 1128 KB correct
7 Correct 3 ms 1128 KB correct
8 Correct 3 ms 1128 KB correct
9 Correct 3 ms 1128 KB correct
10 Correct 3 ms 1128 KB correct
11 Correct 3 ms 1128 KB correct
12 Correct 3 ms 1128 KB correct
13 Correct 4 ms 1128 KB correct
14 Correct 16 ms 1132 KB correct
15 Correct 19 ms 1132 KB correct
16 Correct 21 ms 1132 KB correct
17 Correct 11 ms 1240 KB correct
18 Correct 6 ms 1240 KB correct
19 Correct 11 ms 1240 KB correct
20 Correct 15 ms 1240 KB correct
21 Correct 13 ms 1240 KB correct
22 Correct 8 ms 1240 KB correct
23 Correct 7 ms 1240 KB correct
24 Correct 8 ms 1240 KB correct
25 Correct 3 ms 1244 KB correct
26 Correct 8 ms 1244 KB correct
27 Correct 8 ms 1244 KB correct
28 Correct 6 ms 1244 KB correct
29 Correct 4 ms 1244 KB correct
30 Correct 8 ms 1244 KB correct
31 Correct 8 ms 1244 KB correct
32 Correct 8 ms 1244 KB correct
33 Correct 7 ms 1244 KB correct

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 888 KB correct
2 Correct 3 ms 888 KB correct
3 Correct 3 ms 1076 KB correct
4 Correct 3 ms 1128 KB correct
5 Correct 3 ms 1128 KB correct
6 Correct 4 ms 1128 KB correct
7 Correct 3 ms 1128 KB correct
8 Correct 3 ms 1128 KB correct
9 Correct 3 ms 1128 KB correct
10 Correct 3 ms 1128 KB correct
11 Correct 3 ms 1128 KB correct
12 Correct 3 ms 1128 KB correct
13 Correct 4 ms 1128 KB correct
14 Correct 16 ms 1132 KB correct
15 Correct 19 ms 1132 KB correct
16 Correct 21 ms 1132 KB correct
17 Correct 11 ms 1240 KB correct
18 Correct 6 ms 1240 KB correct
19 Correct 11 ms 1240 KB correct
20 Correct 15 ms 1240 KB correct
21 Correct 13 ms 1240 KB correct
22 Correct 8 ms 1240 KB correct
23 Correct 7 ms 1240 KB correct
24 Correct 8 ms 1240 KB correct
25 Correct 3 ms 1244 KB correct
26 Correct 8 ms 1244 KB correct
27 Correct 8 ms 1244 KB correct
28 Correct 6 ms 1244 KB correct
29 Correct 4 ms 1244 KB correct
30 Correct 8 ms 1244 KB correct
31 Correct 8 ms 1244 KB correct
32 Correct 8 ms 1244 KB correct
33 Correct 7 ms 1244 KB correct
34 Execution timed out 3097 ms 1516 KB Time limit exceeded
35 Halted 0 ms 0 KB -

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1516 KB correct
2 Correct 3 ms 1516 KB correct
3 Runtime error 46 ms 4336 KB Execution killed with signal 11 (could be triggered by violating memory limits)
4 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 888 KB correct
2 Correct 3 ms 888 KB correct
3 Correct 3 ms 1076 KB correct
4 Correct 3 ms 1128 KB correct
5 Correct 3 ms 1128 KB correct
6 Correct 4 ms 1128 KB correct
7 Correct 3 ms 1128 KB correct
8 Correct 3 ms 1128 KB correct
9 Correct 3 ms 1128 KB correct
10 Correct 3 ms 1128 KB correct
11 Correct 3 ms 1128 KB correct
12 Correct 3 ms 1128 KB correct
13 Correct 4 ms 1128 KB correct
14 Correct 16 ms 1132 KB correct
15 Correct 19 ms 1132 KB correct
16 Correct 21 ms 1132 KB correct
17 Correct 11 ms 1240 KB correct
18 Correct 6 ms 1240 KB correct
19 Correct 11 ms 1240 KB correct
20 Correct 15 ms 1240 KB correct
21 Correct 13 ms 1240 KB correct
22 Correct 8 ms 1240 KB correct
23 Correct 7 ms 1240 KB correct
24 Correct 8 ms 1240 KB correct
25 Correct 3 ms 1244 KB correct
26 Correct 8 ms 1244 KB correct
27 Correct 8 ms 1244 KB correct
28 Correct 6 ms 1244 KB correct
29 Correct 4 ms 1244 KB correct
30 Correct 8 ms 1244 KB correct
31 Correct 8 ms 1244 KB correct
32 Correct 8 ms 1244 KB correct
33 Correct 7 ms 1244 KB correct
34 Execution timed out 3097 ms 1516 KB Time limit exceeded
35 Halted 0 ms 0 KB -