Submission #30072

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
30072	2017-07-22 04:38:02	tlwpdus	Untitled (POI11_tem)	C++11	100 / 100	439 ms	12604 KiB

Main

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#include <bits/stdc++.h>
using namespace std;
typedef pair<int,int> pii;
int n;
int S[1000100], E[1000100];
deque<pii> dq;
void push(pii a) {
  while(!dq.empty()&&dq.back().second<=a.second) dq.pop_back();
  dq.push_back(a);
}
int main() {
  int i, j, res = 1;
  scanf("%d",&n);
  for (i=0;i<n;i++) scanf("%d%d",&S[i],&E[i]);
  i = 0; j = -1;
  for (;i<n;i++) {
    if (!dq.empty()&&dq.front().first<i) dq.pop_front();
    if (j<i) {j=i;push(pii(j,S[j]));}
    for (;j+1<n;) {
      if (dq.front().second<=E[j+1]) {j++;push(pii(j,S[j]));}
      else break;
    }
    res = max(res,j-i+1);
  }
  printf("%d\n",res);
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

tem.cpp: In function 'int main()':
tem.cpp:18:16: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
                ^
tem.cpp:19:45: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for (i=0;i<n;i++) scanf("%d%d",&S[i],&E[i]);
                                             ^

• Subtask 1: 8 / 8
• Subtask 2: 8 / 8
• Subtask 3: 8 / 8
• Subtask 4: 8 / 8
• Subtask 5: 8 / 8
• Subtask 6: 8 / 8
• Subtask 7: 8 / 8
• Subtask 8: 8 / 8
• Subtask 9: 9 / 9
• Subtask 10: 9 / 9
• Subtask 11: 9 / 9
• Subtask 12: 9 / 9