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Submission #56768

# Submission time Handle Problem Language Result Execution time Memory
56768 2018-07-12T14:30:45 Z win11905 Teleporters (IOI08_teleporters) C++11
100 / 100
 803 ms 55340 KB 
#include <bits/stdc++.h>
#define pii pair<int, int>
#define x first
#define y second
using namespace std;
 
const int N = 2e6+5;
 
int n, m, psz, pz1;
bool Check[N];
 
int main() {
  	vector<int> V(N), val(N), neibour(N), Com(N);
    scanf("%d %d", &n, &m);
    for(int i = 0, u, v; i < n; ++i) {
        scanf("%d %d", &u, &v);
        neibour[u] = v, neibour[v] = u;
        V[u]++, V[v]++;
    }
    for(int i = 1; i < N; ++i) {
        V[i] += V[i-1];
        if(V[i] != V[i-1]) Com[pz1++] = i;
    }
    int cnt = 0, p = 0; Check[0] = true;
    while(p != (n<<1)) Check[p = V[neibour[Com[p]]]] = true, cnt++;
    for(int i = 1; i <= (n<<1); ++i) if(!Check[i]) {
        int u = i, sz = 0; Check[u] = true;
        do Check[u = V[neibour[Com[u]]]] = true, sz++; while(u != i);
        val[++psz] = sz;
    }
    sort(val.begin()+1, val.begin() + psz + 1, greater<int>()); for(int i = 1; i <= psz; ++i) val[i] += val[i-1]; 
    cnt += val[min(psz, m)] + 2 * min(psz, m);
    if(m > psz) m -= psz, cnt += ((m>>1)<<2) + (m & 1);
    printf("%d\n", cnt);
}

Compilation message

teleporters.cpp: In function 'int main()':
teleporters.cpp:14:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~~
teleporters.cpp:16:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d", &u, &v);
         ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 35 ms 31608 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 35 ms 31848 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 31848 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 34 ms 31848 KB Output is correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 37 ms 31848 KB Output is correct

Subtask #6
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 31848 KB Output is correct

Subtask #7
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 31848 KB Output is correct

Subtask #8
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 37 ms 31848 KB Output is correct

Subtask #9
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 35 ms 31900 KB Output is correct

Subtask #10
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 31900 KB Output is correct

Subtask #11
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 38 ms 31900 KB Output is correct

Subtask #12
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 35 ms 31912 KB Output is correct
2 Correct 41 ms 31912 KB Output is correct

Subtask #13
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 44 ms 31912 KB Output is correct
2 Correct 51 ms 31944 KB Output is correct
3 Correct 44 ms 31944 KB Output is correct

Subtask #14
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 44 ms 31944 KB Output is correct

Subtask #15
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 31944 KB Output is correct

Subtask #16
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 100 ms 32132 KB Output is correct
2 Correct 270 ms 32460 KB Output is correct

Subtask #17
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 190 ms 32460 KB Output is correct
2 Correct 391 ms 32876 KB Output is correct

Subtask #18
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 470 ms 33276 KB Output is correct
2 Correct 513 ms 33532 KB Output is correct
3 Correct 410 ms 33532 KB Output is correct

Subtask #19
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 678 ms 33620 KB Output is correct
2 Correct 803 ms 40524 KB Output is correct
3 Correct 579 ms 40576 KB Output is correct
4 Correct 633 ms 40604 KB Output is correct

Subtask #20
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 705 ms 40604 KB Output is correct
2 Correct 600 ms 40604 KB Output is correct
3 Correct 344 ms 40604 KB Output is correct
4 Correct 501 ms 55340 KB Output is correct