oj.uz

Submission #121028

# Submission time Handle Problem Language Result Execution time Memory
121028 2019-06-26T03:19:26 Z IOrtroiii Alternating Current (BOI18_alternating) C++14
0 / 100
 30 ms 3020 KB 
#include <bits/stdc++.h>

using namespace std;

const int N = 100100;

int color[N];

int main() {
   ios_base::sync_with_stdio(false);
   int n, m;
   cin >> n >> m;
   vector<tuple<int, int, int>> vals;
   for (int i = 1; i <= m; ++i) {
      int l, r;
      cin >> l >> r;
      assert(l <= r);
      vals.emplace_back(l, -r, i);
   }
   sort(vals.begin(), vals.end());
   int gol = 0;
   int gor = 0;
   for (auto v : vals) {
      int l, r, id;
      tie(l, r, id) = v;
      if (gol < gor) {
         if (l > gol + 1) {
            puts("impossible");
            return 0;
         }
         color[id] = 0;
         gol = max(gol, r);
      } else {
         if (l > gor + 1) {
            puts("impossible");
            return 0;
         }
         color[id] = 1;
         gor = max(gor, r);
      }
   }
   for (int i = 1; i <= m; ++i) {
      printf("%d", color[i]);
   }
}

Subtask #1
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 384 KB no wires in direction 0 between segments 1 and 15
2 Halted 0 ms 0 KB -

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 384 KB no wires in direction 0 between segments 1 and 15
2 Halted 0 ms 0 KB -

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 384 KB no wires in direction 0 between segments 1 and 15
2 Halted 0 ms 0 KB -

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Incorrect 30 ms 3020 KB no wires in direction 0 between segments 1 and 100000
2 Halted 0 ms 0 KB -

Subtask #5
0 / 26.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 384 KB no wires in direction 0 between segments 1 and 15
2 Halted 0 ms 0 KB -