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Submission #117792

# Submission time Handle Problem Language Result Execution time Memory
117792 2019-06-17T08:00:53 Z Plurm Simurgh (IOI17_simurgh) C++14
30 / 100
 219 ms 4028 KB 
#include "simurgh.h"
#include <bits/stdc++.h>
using namespace std;
vector<pair<int,int> > g[512];
int par[512];
int pare[512];
vector<int> cycle;
void dfs(int u, int p = -1){
    for(auto v : g[u]){
        if(v.first == p) continue;
        if(par[v.first] != -1){
            // Cycle is found!
            if(cycle.empty()){
                // First cycle found. Use it.
                int x = u;
                cycle.push_back(v.second);
                while(x != v.first){
                    cycle.push_back(pare[x]);
                    x = par[x];
                }
            }
        }else{
            pare[v.first] = v.second;
            par[v.first] = u;
            dfs(v.first, u);
        }
    }
}
bool disabled[512*256];
vector<int> find_roads(int n, vector<int> u, vector<int> v) {
    int m = u.size();
    do{
        for(int i = 0; i < n; i++){
            g[i].clear();
        }
        for(int i = 0; i < m; i++){
            if(!disabled[i]) {
                g[u[i]].emplace_back(v[i], i);
                g[v[i]].emplace_back(u[i], i);
            }
        }
        memset(par, -1, sizeof(par));
        memset(pare, 0, sizeof(pare));
        cycle.clear();
        par[0] = -2;
        dfs(0);
        vector<int> r;
        for(int i = 1; i < n; i++){
            r.push_back(pare[i]);
        }
        int ret = count_common_roads(r);
        if(ret == n-1) return r;
        int mx = -1;
        int mindex = -1;
        if(ret > mx){
            mx = ret;
            mindex = 0;
        }
        for(int i = 1; i < cycle.size(); i++){
            r.erase(find(r.begin(), r.end(), cycle[i]));
            r.push_back(cycle[i-1]);
            ret = count_common_roads(r);
            if(ret == n-1) return r;
            if(ret > mx){
                mx = ret;
                mindex = i;
            }
        }
        disabled[cycle[mindex]] = true;
    }while(!cycle.empty());
    vector<int> r;
    for(int i = 1; i < n; i++){
        r.push_back(pare[i]);
    }
    return r;
}

Compilation message

simurgh.cpp: In function 'std::vector<int> find_roads(int, std::vector<int>, std::vector<int>)':
simurgh.cpp:59:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int i = 1; i < cycle.size(); i++){
                        ~~^~~~~~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB correct
2 Correct 2 ms 384 KB correct
3 Correct 2 ms 384 KB correct
4 Correct 2 ms 384 KB correct
5 Correct 2 ms 356 KB correct
6 Correct 2 ms 384 KB correct
7 Correct 2 ms 472 KB correct
8 Correct 2 ms 384 KB correct
9 Correct 2 ms 384 KB correct
10 Correct 2 ms 384 KB correct
11 Correct 2 ms 384 KB correct
12 Correct 2 ms 384 KB correct
13 Correct 3 ms 384 KB correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB correct
2 Correct 2 ms 384 KB correct
3 Correct 2 ms 384 KB correct
4 Correct 2 ms 384 KB correct
5 Correct 2 ms 356 KB correct
6 Correct 2 ms 384 KB correct
7 Correct 2 ms 472 KB correct
8 Correct 2 ms 384 KB correct
9 Correct 2 ms 384 KB correct
10 Correct 2 ms 384 KB correct
11 Correct 2 ms 384 KB correct
12 Correct 2 ms 384 KB correct
13 Correct 3 ms 384 KB correct
14 Correct 22 ms 384 KB correct
15 Correct 21 ms 444 KB correct
16 Correct 21 ms 384 KB correct
17 Correct 17 ms 436 KB correct
18 Correct 7 ms 356 KB correct
19 Correct 19 ms 384 KB correct
20 Correct 19 ms 432 KB correct
21 Correct 21 ms 436 KB correct
22 Correct 10 ms 384 KB correct
23 Correct 8 ms 384 KB correct
24 Correct 8 ms 384 KB correct
25 Correct 2 ms 384 KB correct
26 Correct 7 ms 384 KB correct
27 Correct 8 ms 420 KB correct
28 Correct 4 ms 384 KB correct
29 Correct 2 ms 384 KB correct
30 Correct 11 ms 384 KB correct
31 Correct 10 ms 384 KB correct
32 Correct 10 ms 356 KB correct
33 Correct 10 ms 384 KB correct

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB correct
2 Correct 2 ms 384 KB correct
3 Correct 2 ms 384 KB correct
4 Correct 2 ms 384 KB correct
5 Correct 2 ms 356 KB correct
6 Correct 2 ms 384 KB correct
7 Correct 2 ms 472 KB correct
8 Correct 2 ms 384 KB correct
9 Correct 2 ms 384 KB correct
10 Correct 2 ms 384 KB correct
11 Correct 2 ms 384 KB correct
12 Correct 2 ms 384 KB correct
13 Correct 3 ms 384 KB correct
14 Correct 22 ms 384 KB correct
15 Correct 21 ms 444 KB correct
16 Correct 21 ms 384 KB correct
17 Correct 17 ms 436 KB correct
18 Correct 7 ms 356 KB correct
19 Correct 19 ms 384 KB correct
20 Correct 19 ms 432 KB correct
21 Correct 21 ms 436 KB correct
22 Correct 10 ms 384 KB correct
23 Correct 8 ms 384 KB correct
24 Correct 8 ms 384 KB correct
25 Correct 2 ms 384 KB correct
26 Correct 7 ms 384 KB correct
27 Correct 8 ms 420 KB correct
28 Correct 4 ms 384 KB correct
29 Correct 2 ms 384 KB correct
30 Correct 11 ms 384 KB correct
31 Correct 10 ms 384 KB correct
32 Correct 10 ms 356 KB correct
33 Correct 10 ms 384 KB correct
34 Incorrect 211 ms 1536 KB WA in grader: NO
35 Halted 0 ms 0 KB -

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB correct
2 Correct 2 ms 384 KB correct
3 Incorrect 219 ms 4028 KB WA in grader: NO
4 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB correct
2 Correct 2 ms 384 KB correct
3 Correct 2 ms 384 KB correct
4 Correct 2 ms 384 KB correct
5 Correct 2 ms 356 KB correct
6 Correct 2 ms 384 KB correct
7 Correct 2 ms 472 KB correct
8 Correct 2 ms 384 KB correct
9 Correct 2 ms 384 KB correct
10 Correct 2 ms 384 KB correct
11 Correct 2 ms 384 KB correct
12 Correct 2 ms 384 KB correct
13 Correct 3 ms 384 KB correct
14 Correct 22 ms 384 KB correct
15 Correct 21 ms 444 KB correct
16 Correct 21 ms 384 KB correct
17 Correct 17 ms 436 KB correct
18 Correct 7 ms 356 KB correct
19 Correct 19 ms 384 KB correct
20 Correct 19 ms 432 KB correct
21 Correct 21 ms 436 KB correct
22 Correct 10 ms 384 KB correct
23 Correct 8 ms 384 KB correct
24 Correct 8 ms 384 KB correct
25 Correct 2 ms 384 KB correct
26 Correct 7 ms 384 KB correct
27 Correct 8 ms 420 KB correct
28 Correct 4 ms 384 KB correct
29 Correct 2 ms 384 KB correct
30 Correct 11 ms 384 KB correct
31 Correct 10 ms 384 KB correct
32 Correct 10 ms 356 KB correct
33 Correct 10 ms 384 KB correct
34 Incorrect 211 ms 1536 KB WA in grader: NO
35 Halted 0 ms 0 KB -