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Submission #83408

# Submission time Handle Problem Language Result Execution time Memory
83408 2018-11-07T13:45:29 Z Tusk Teleporters (IOI08_teleporters) C++14
95 / 100
 668 ms 66560 KB 
#include <bits/stdc++.h>

using namespace std;

const int N = 2e6+1;

int n, m;
bitset<N> chk;
int sz[N], mp[N], pos[N], comp;
vector<int> dp(N);

int main() {
      scanf("%d %d", &n, &m);
      for(int i = 1, a, b; i <= n; i++) {
            scanf("%d %d", &a, &b);
            mp[a] = b, mp[b] = a;
            ++dp[a], ++dp[b];
      }
      int ptr = 0;
      for(int i = 1; i < N; i++) {
            dp[i] += dp[i-1];
            if(dp[i] != dp[i-1]) pos[ptr++] = i;
      }
      for(int i = 0; i < 2*n; i++) if(!chk[i]) {
            ++comp;
            chk[i] = true;
            int u = i;
            while(1) {
                  ++sz[comp];
                  int v = dp[mp[pos[u]]];
                  if(chk[v] || v == 2*n) break;
                  chk[v] = true;
                  u = v;
            }
      }
      int ans = sz[1];
      for(int i = 2; i <= comp; i++) dp[i-2] = sz[i];
      sort(dp.begin(), dp.begin() + comp - 1, greater<int>());
      for(int i = 0; i < comp-1 && m; i++, m--) ans += dp[i] + 2;
      if(m) ans += 2*(m - (m & 1)) + (m & 1);
      printf("%d\n", ans);

      return 0;
}

Compilation message

teleporters.cpp: In function 'int main()':
teleporters.cpp:13:12: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
       scanf("%d %d", &n, &m);
       ~~~~~^~~~~~~~~~~~~~~~~
teleporters.cpp:15:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d %d", &a, &b);
             ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 8220 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 8220 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 8464 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 8464 KB Output is correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 8464 KB Output is correct

Subtask #6
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 8528 KB Output is correct

Subtask #7
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 8528 KB Output is correct

Subtask #8
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 8528 KB Output is correct

Subtask #9
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 8528 KB Output is correct

Subtask #10
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 8528 KB Output is correct

Subtask #11
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 8528 KB Output is correct

Subtask #12
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 8600 KB Output is correct
2 Correct 21 ms 8948 KB Output is correct

Subtask #13
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 8948 KB Output is correct
2 Correct 20 ms 9340 KB Output is correct
3 Correct 24 ms 9676 KB Output is correct

Subtask #14
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 9676 KB Output is correct

Subtask #15
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 9804 KB Output is correct

Subtask #16
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 83 ms 12800 KB Output is correct
2 Correct 255 ms 18964 KB Output is correct

Subtask #17
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 198 ms 18964 KB Output is correct
2 Correct 377 ms 22100 KB Output is correct

Subtask #18
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 392 ms 24656 KB Output is correct
2 Correct 518 ms 26060 KB Output is correct
3 Correct 412 ms 26916 KB Output is correct

Subtask #19
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 668 ms 27104 KB Output is correct
2 Correct 643 ms 28228 KB Output is correct
3 Correct 493 ms 28228 KB Output is correct
4 Correct 509 ms 28228 KB Output is correct

Subtask #20
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 661 ms 29104 KB Output is correct
2 Correct 643 ms 43960 KB Output is correct
3 Correct 297 ms 59696 KB Output is correct
4 Runtime error 515 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.