oj.uz

Submission #274687

# Submission time Handle Problem Language Result Execution time Memory
274687 2020-08-19T14:11:32 Z evpipis Regions (IOI09_regions) C++11
0 / 100
 118 ms 6760 KB 
#include <bits/stdc++.h>
using namespace std;

#define fi first
#define se second
#define mp make_pair
#define pb push_back
typedef pair<int, int> ii;

const int len = 2e6+5;
int vis[len], nex[len];
vector<ii> vec;
priority_queue<int> pq;

int dfs(int u){
    vis[u] = 1;

    int ans = 1;
    if (!vis[nex[u]])
        ans += dfs(nex[u]);

    return ans;
}

int main(){
    int n, m;
    scanf("%d %d", &n, &m);
    for (int i = 0; i < n; i++){
        int a, b;
        scanf("%d %d", &a, &b);
        vec.pb(mp(a, 2*i));
        vec.pb(mp(b, 2*i+1));
    }

    sort(vec.begin(), vec.end());

    for (int i = 0; i < 2*n-1; i++)
        nex[vec[i].se] = vec[i+1].se^1;

    int st = 2*n;
    nex[st] = vec[0].se^1;
    nex[vec[2*n-1].se] = st;
    vis[st] = 1;

    int ans = dfs(nex[st]);
    for (int i = 0; i < 2*n; i++)
        if (!vis[i])
            pq.push(dfs(i));

    while (m--){
        if (pq.empty())
            ans++, pq.push(1);
        else
            ans += 2+pq.top(), pq.pop();
    }

    printf("%d\n", ans);
    return 0;
}

Compilation message

regions.cpp: In function 'int main()':
regions.cpp:27:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   27 |     scanf("%d %d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~~
regions.cpp:30:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   30 |         scanf("%d %d", &a, &b);
      |         ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 384 KB Unexpected end of file - int32 expected
2 Incorrect 0 ms 384 KB Unexpected end of file - int32 expected
3 Incorrect 1 ms 384 KB Unexpected end of file - int32 expected
4 Incorrect 0 ms 384 KB Unexpected end of file - int32 expected
5 Incorrect 1 ms 384 KB Unexpected end of file - int32 expected
6 Incorrect 1 ms 384 KB Unexpected end of file - int32 expected
7 Incorrect 1 ms 384 KB Unexpected end of file - int32 expected
8 Incorrect 1 ms 384 KB Unexpected end of file - int32 expected
9 Incorrect 3 ms 640 KB Unexpected end of file - int32 expected
10 Incorrect 5 ms 768 KB Unexpected end of file - int32 expected
11 Incorrect 8 ms 1020 KB Unexpected end of file - int32 expected
12 Incorrect 11 ms 1144 KB Unexpected end of file - int32 expected
13 Incorrect 14 ms 1144 KB Unexpected end of file - int32 expected
14 Incorrect 15 ms 1400 KB Unexpected end of file - int32 expected
15 Incorrect 22 ms 1652 KB Unexpected end of file - int32 expected

Subtask #2
0 / 85.0

# Verdict Execution time Memory Grader output
1 Incorrect 35 ms 2788 KB Unexpected end of file - int32 expected
2 Incorrect 45 ms 2920 KB Unexpected end of file - int32 expected
3 Incorrect 42 ms 3304 KB Unexpected end of file - int32 expected
4 Incorrect 16 ms 1400 KB Unexpected end of file - int32 expected
5 Incorrect 22 ms 1644 KB Unexpected end of file - int32 expected
6 Incorrect 26 ms 2028 KB Unexpected end of file - int32 expected
7 Incorrect 36 ms 2660 KB Unexpected end of file - int32 expected
8 Incorrect 51 ms 3556 KB Unexpected end of file - int32 expected
9 Incorrect 79 ms 5212 KB Unexpected end of file - int32 expected
10 Incorrect 106 ms 5724 KB Unexpected end of file - int32 expected
11 Incorrect 118 ms 6748 KB Unexpected end of file - int32 expected
12 Incorrect 114 ms 6368 KB Unexpected end of file - int32 expected
13 Incorrect 102 ms 6364 KB Unexpected end of file - int32 expected
14 Incorrect 109 ms 6748 KB Unexpected end of file - int32 expected
15 Incorrect 106 ms 6760 KB Unexpected end of file - int32 expected
16 Incorrect 114 ms 6704 KB Unexpected end of file - int32 expected
17 Incorrect 105 ms 6748 KB Unexpected end of file - int32 expected