oj.uz

답안 #23192

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
23192 2017-05-04T11:43:29 Z model_code Baloni (COCI15_baloni) C++11
100 / 100
 1599 ms 96004 KB 
#include <cstdio>
#include <algorithm>
#include <cstring>
#include <set>

using namespace std;

const int MAXN = 1 << 20;

int n;

set <int> S[MAXN];
int find (int pos, int v) {
  set<int>::iterator it = S[v].lower_bound(pos);
  if (it == S[v].end()) return -1;
  return *it;
}

int v[MAXN];

int main (void){
  scanf("%d", &n);
  for (int i = 0; i < n; ++i) {
    scanf("%d", &v[i]);
    S[v[i]].insert(i);
  }

  int ans = 0;
  for (int i = 0; i < n; ++i) {
   if (S[v[i]].count(i) == 0) continue;
   int pos = i;
   ++ans;
   while (pos >= 0) {
      S[v[pos]].erase(pos);
      pos = find(pos, v[pos] - 1);
   }
  }

  printf("%d\n", ans);

  return 0;
}

Compilation message

baloni.cpp: In function 'int main()':
baloni.cpp:22:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &n);
                  ^
baloni.cpp:24:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &v[i]);
                       ^

Subtask #1
100.0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 54424 KB Output is correct
2 Correct 6 ms 54556 KB Output is correct
3 Correct 9 ms 54688 KB Output is correct
4 Correct 13 ms 54688 KB Output is correct
5 Correct 1193 ms 91516 KB Output is correct
6 Correct 1599 ms 96004 KB Output is correct
7 Correct 1229 ms 88744 KB Output is correct
8 Correct 1146 ms 88348 KB Output is correct
9 Correct 1249 ms 90196 KB Output is correct
10 Correct 1229 ms 91648 KB Output is correct