oj.uz

Submission #56747

# Submission time Handle Problem Language Result Execution time Memory
56747 2018-07-12T11:32:04 Z win11905 Teleporters (IOI08_teleporters) C++11
50 / 100
 880 ms 66560 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, V[N], val[N], neibour[N], Com[N], psz, pz1;
bool Check[N];

int main() {
    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;
        val[psz] += val[psz-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:13:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~~
teleporters.cpp:15:14: 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 19 ms 8184 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 8296 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 8360 KB Output is correct

Subtask #4
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 17 ms 8384 KB Output isn't correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 8384 KB Output is correct

Subtask #6
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 8436 KB Output is correct

Subtask #7
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 8440 KB Output is correct

Subtask #8
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 17 ms 8444 KB Output isn't correct

Subtask #9
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 20 ms 8448 KB Output isn't correct

Subtask #10
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 8452 KB Output is correct

Subtask #11
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 8456 KB Output is correct

Subtask #12
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 8588 KB Output is correct
2 Incorrect 23 ms 8876 KB Output isn't correct

Subtask #13
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 8876 KB Output is correct
2 Incorrect 28 ms 9580 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #14
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 9580 KB Output is correct

Subtask #15
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 25 ms 9580 KB Output isn't correct

Subtask #16
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 130 ms 14356 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #17
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 242 ms 21100 KB Output is correct
2 Correct 485 ms 33244 KB Output is correct

Subtask #18
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 587 ms 45012 KB Output is correct
2 Incorrect 591 ms 57564 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# Verdict Execution time Memory Grader output
1 Runtime error 815 ms 66560 KB Memory limit exceeded: We have a known bug that the memory usage is measured incorrectly (possibly because of Meltdown/Spectre patch), so your solution may be correct. Please submit again. Sorry for the inconvenience.
2 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# Verdict Execution time Memory Grader output
1 Runtime error 880 ms 66560 KB Memory limit exceeded: We have a known bug that the memory usage is measured incorrectly (possibly because of Meltdown/Spectre patch), so your solution may be correct. Please submit again. Sorry for the inconvenience.
2 Halted 0 ms 0 KB -