| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 20493 |
2017-02-12T05:40:22 Z |
볼빨간민돌이(#63, mindol) |
초음속철도 (OJUZ11_rail) |
C++11 |
|
513 ms |
7104 KB |
#include <cstdio>
#include <algorithm>
#include <vector>
#include <stack>
using namespace std;
const int MAXM = 200000;
const int mod = 1e9+7;
int n, m, s[MAXM+1], e[MAXM+1];
int myPow(int a, int r){
if(r==0) return 1;
int half=myPow(a, r/2);
if(r&1) return half*1ll*half%mod*a%mod;
else return half*1ll*half%mod;
}
bool use[MAXM+1];
int check(){
vector<pair<int, int>> v;
for(int i=1; i<=m; i++)
if(use[i]) v.push_back(make_pair(s[i], e[i]));
sort(v.begin(), v.end());
if(v.empty()) return 0;
int now=1;
for(auto &e:v){
if(e.first > now) break;
else now=max(now, e.second);
}
return now==n;
}
int f(int now){
if(now==m+1) return check();
int sum=0;
use[now]=true;
sum+=f(now+1);
use[now]=false;
sum+=f(now+1);
return sum;
}
bool comp3(const pair<int, int> &p1, const pair<int, int> &p2){
if(p1.first == p2.first) return p1.second > p2.second;
else return p1.first < p2.first;
}
int sub3(){
for(int i=1; i<=m; i++)
use[i]=true;
if(!check()) return 0;
vector<pair<int, int>> v;
for(int i=1; i<=m; i++)
v.push_back(make_pair(s[i], e[i]));
sort(v.begin(), v.end(), comp3);
int ans=1;
pair<int, int> piv;
int pivCnt=0, norCnt=0;
for(auto &e:v){
if(pivCnt==0) pivCnt++, piv=e;
else{
if(e.first >= piv.second){
ans=ans*1ll*(myPow(2, pivCnt)-1)%mod*myPow(2, norCnt)%mod;
pivCnt=1, norCnt=0, piv=e;
}
else{
if(e==piv) pivCnt++;
else norCnt++;
}
}
}
if(pivCnt) ans=ans*1ll*(myPow(2, pivCnt)-1)%mod*myPow(2, norCnt)%mod;
if(ans<0) ans+=mod;
return ans;
}
int main(){
#ifndef EVAL
freopen("input.txt", "r", stdin);
#endif
scanf("%d %d", &n, &m);
for(int i=1; i<=m; i++)
scanf("%d %d", &s[i], &e[i]);
if(m<=20){
printf("%d\n", f(1));
return 0;
}
else{
printf("%d\n", sub3());
return 0;
}
return 0;
}
Compilation message
rail.cpp: In function 'int main()':
rail.cpp:87:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d", &n, &m);
^
rail.cpp:89:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d", &s[i], &e[i]);
^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
379 ms |
2932 KB |
Output is correct |
| 2 |
Correct |
223 ms |
2932 KB |
Output is correct |
| 3 |
Correct |
399 ms |
2932 KB |
Output is correct |
| 4 |
Correct |
406 ms |
2932 KB |
Output is correct |
| 5 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 6 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 7 |
Correct |
413 ms |
2932 KB |
Output is correct |
| 8 |
Correct |
49 ms |
2932 KB |
Output is correct |
| 9 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 10 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 11 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 12 |
Correct |
203 ms |
2932 KB |
Output is correct |
| 13 |
Correct |
353 ms |
2932 KB |
Output is correct |
| 14 |
Correct |
199 ms |
2932 KB |
Output is correct |
| 15 |
Correct |
409 ms |
2932 KB |
Output is correct |
| 16 |
Correct |
409 ms |
2932 KB |
Output is correct |
| 17 |
Correct |
406 ms |
2932 KB |
Output is correct |
| 18 |
Correct |
436 ms |
2932 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
379 ms |
2932 KB |
Output is correct |
| 2 |
Correct |
223 ms |
2932 KB |
Output is correct |
| 3 |
Correct |
399 ms |
2932 KB |
Output is correct |
| 4 |
Correct |
406 ms |
2932 KB |
Output is correct |
| 5 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 6 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 7 |
Correct |
413 ms |
2932 KB |
Output is correct |
| 8 |
Correct |
49 ms |
2932 KB |
Output is correct |
| 9 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 10 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 11 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 12 |
Correct |
203 ms |
2932 KB |
Output is correct |
| 13 |
Correct |
353 ms |
2932 KB |
Output is correct |
| 14 |
Correct |
199 ms |
2932 KB |
Output is correct |
| 15 |
Correct |
409 ms |
2932 KB |
Output is correct |
| 16 |
Correct |
409 ms |
2932 KB |
Output is correct |
| 17 |
Correct |
406 ms |
2932 KB |
Output is correct |
| 18 |
Correct |
436 ms |
2932 KB |
Output is correct |
| 19 |
Correct |
403 ms |
2932 KB |
Output is correct |
| 20 |
Correct |
459 ms |
2932 KB |
Output is correct |
| 21 |
Correct |
459 ms |
2932 KB |
Output is correct |
| 22 |
Correct |
96 ms |
2932 KB |
Output is correct |
| 23 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 24 |
Correct |
96 ms |
2932 KB |
Output is correct |
| 25 |
Correct |
103 ms |
2932 KB |
Output is correct |
| 26 |
Correct |
103 ms |
2932 KB |
Output is correct |
| 27 |
Correct |
419 ms |
2932 KB |
Output is correct |
| 28 |
Correct |
406 ms |
2932 KB |
Output is correct |
| 29 |
Correct |
513 ms |
2932 KB |
Output is correct |
| 30 |
Correct |
413 ms |
2932 KB |
Output is correct |
| 31 |
Correct |
449 ms |
2932 KB |
Output is correct |
| 32 |
Correct |
203 ms |
2932 KB |
Output is correct |
| 33 |
Correct |
406 ms |
2932 KB |
Output is correct |
| 34 |
Correct |
409 ms |
2932 KB |
Output is correct |
| 35 |
Correct |
433 ms |
2932 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 2 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 3 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 4 |
Incorrect |
0 ms |
3072 KB |
Output isn't correct |
| 5 |
Incorrect |
96 ms |
7104 KB |
Output isn't correct |
| 6 |
Correct |
129 ms |
7104 KB |
Output is correct |
| 7 |
Correct |
106 ms |
7104 KB |
Output is correct |
| 8 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 9 |
Correct |
126 ms |
7104 KB |
Output is correct |
| 10 |
Correct |
126 ms |
7104 KB |
Output is correct |
| 11 |
Correct |
46 ms |
5056 KB |
Output is correct |
| 12 |
Correct |
126 ms |
7104 KB |
Output is correct |
| 13 |
Correct |
123 ms |
7104 KB |
Output is correct |
| 14 |
Correct |
66 ms |
7104 KB |
Output is correct |
| 15 |
Correct |
139 ms |
7104 KB |
Output is correct |
| 16 |
Correct |
83 ms |
7104 KB |
Output is correct |
| 17 |
Correct |
119 ms |
7104 KB |
Output is correct |
| 18 |
Correct |
123 ms |
7104 KB |
Output is correct |
| 19 |
Correct |
116 ms |
7104 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
379 ms |
2932 KB |
Output is correct |
| 2 |
Correct |
223 ms |
2932 KB |
Output is correct |
| 3 |
Correct |
399 ms |
2932 KB |
Output is correct |
| 4 |
Correct |
406 ms |
2932 KB |
Output is correct |
| 5 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 6 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 7 |
Correct |
413 ms |
2932 KB |
Output is correct |
| 8 |
Correct |
49 ms |
2932 KB |
Output is correct |
| 9 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 10 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 11 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 12 |
Correct |
203 ms |
2932 KB |
Output is correct |
| 13 |
Correct |
353 ms |
2932 KB |
Output is correct |
| 14 |
Correct |
199 ms |
2932 KB |
Output is correct |
| 15 |
Correct |
409 ms |
2932 KB |
Output is correct |
| 16 |
Correct |
409 ms |
2932 KB |
Output is correct |
| 17 |
Correct |
406 ms |
2932 KB |
Output is correct |
| 18 |
Correct |
436 ms |
2932 KB |
Output is correct |
| 19 |
Correct |
403 ms |
2932 KB |
Output is correct |
| 20 |
Correct |
459 ms |
2932 KB |
Output is correct |
| 21 |
Correct |
459 ms |
2932 KB |
Output is correct |
| 22 |
Correct |
96 ms |
2932 KB |
Output is correct |
| 23 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 24 |
Correct |
96 ms |
2932 KB |
Output is correct |
| 25 |
Correct |
103 ms |
2932 KB |
Output is correct |
| 26 |
Correct |
103 ms |
2932 KB |
Output is correct |
| 27 |
Correct |
419 ms |
2932 KB |
Output is correct |
| 28 |
Correct |
406 ms |
2932 KB |
Output is correct |
| 29 |
Correct |
513 ms |
2932 KB |
Output is correct |
| 30 |
Correct |
413 ms |
2932 KB |
Output is correct |
| 31 |
Correct |
449 ms |
2932 KB |
Output is correct |
| 32 |
Correct |
203 ms |
2932 KB |
Output is correct |
| 33 |
Correct |
406 ms |
2932 KB |
Output is correct |
| 34 |
Correct |
409 ms |
2932 KB |
Output is correct |
| 35 |
Correct |
433 ms |
2932 KB |
Output is correct |
| 36 |
Incorrect |
3 ms |
3072 KB |
Output isn't correct |
| 37 |
Incorrect |
0 ms |
3072 KB |
Output isn't correct |
| 38 |
Incorrect |
0 ms |
3072 KB |
Output isn't correct |
| 39 |
Incorrect |
0 ms |
3072 KB |
Output isn't correct |
| 40 |
Correct |
3 ms |
3072 KB |
Output is correct |
| 41 |
Correct |
0 ms |
3072 KB |
Output is correct |
| 42 |
Incorrect |
0 ms |
3072 KB |
Output isn't correct |
| 43 |
Incorrect |
0 ms |
2932 KB |
Output isn't correct |
| 44 |
Incorrect |
3 ms |
3072 KB |
Output isn't correct |
| 45 |
Correct |
0 ms |
3072 KB |
Output is correct |
| 46 |
Incorrect |
0 ms |
3072 KB |
Output isn't correct |
| 47 |
Incorrect |
3 ms |
3072 KB |
Output isn't correct |
| 48 |
Incorrect |
0 ms |
3072 KB |
Output isn't correct |
| 49 |
Incorrect |
0 ms |
3072 KB |
Output isn't correct |
| 50 |
Incorrect |
0 ms |
3072 KB |
Output isn't correct |
| 51 |
Incorrect |
3 ms |
3072 KB |
Output isn't correct |
| 52 |
Incorrect |
0 ms |
2932 KB |
Output isn't correct |
| 53 |
Correct |
0 ms |
3072 KB |
Output is correct |
| 54 |
Incorrect |
0 ms |
3072 KB |
Output isn't correct |
| 55 |
Correct |
0 ms |
3072 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
379 ms |
2932 KB |
Output is correct |
| 2 |
Correct |
223 ms |
2932 KB |
Output is correct |
| 3 |
Correct |
399 ms |
2932 KB |
Output is correct |
| 4 |
Correct |
406 ms |
2932 KB |
Output is correct |
| 5 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 6 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 7 |
Correct |
413 ms |
2932 KB |
Output is correct |
| 8 |
Correct |
49 ms |
2932 KB |
Output is correct |
| 9 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 10 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 11 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 12 |
Correct |
203 ms |
2932 KB |
Output is correct |
| 13 |
Correct |
353 ms |
2932 KB |
Output is correct |
| 14 |
Correct |
199 ms |
2932 KB |
Output is correct |
| 15 |
Correct |
409 ms |
2932 KB |
Output is correct |
| 16 |
Correct |
409 ms |
2932 KB |
Output is correct |
| 17 |
Correct |
406 ms |
2932 KB |
Output is correct |
| 18 |
Correct |
436 ms |
2932 KB |
Output is correct |
| 19 |
Correct |
403 ms |
2932 KB |
Output is correct |
| 20 |
Correct |
459 ms |
2932 KB |
Output is correct |
| 21 |
Correct |
459 ms |
2932 KB |
Output is correct |
| 22 |
Correct |
96 ms |
2932 KB |
Output is correct |
| 23 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 24 |
Correct |
96 ms |
2932 KB |
Output is correct |
| 25 |
Correct |
103 ms |
2932 KB |
Output is correct |
| 26 |
Correct |
103 ms |
2932 KB |
Output is correct |
| 27 |
Correct |
419 ms |
2932 KB |
Output is correct |
| 28 |
Correct |
406 ms |
2932 KB |
Output is correct |
| 29 |
Correct |
513 ms |
2932 KB |
Output is correct |
| 30 |
Correct |
413 ms |
2932 KB |
Output is correct |
| 31 |
Correct |
449 ms |
2932 KB |
Output is correct |
| 32 |
Correct |
203 ms |
2932 KB |
Output is correct |
| 33 |
Correct |
406 ms |
2932 KB |
Output is correct |
| 34 |
Correct |
409 ms |
2932 KB |
Output is correct |
| 35 |
Correct |
433 ms |
2932 KB |
Output is correct |
| 36 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 37 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 38 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 39 |
Incorrect |
0 ms |
3072 KB |
Output isn't correct |
| 40 |
Incorrect |
96 ms |
7104 KB |
Output isn't correct |
| 41 |
Correct |
129 ms |
7104 KB |
Output is correct |
| 42 |
Correct |
106 ms |
7104 KB |
Output is correct |
| 43 |
Correct |
0 ms |
2932 KB |
Output is correct |
| 44 |
Correct |
126 ms |
7104 KB |
Output is correct |
| 45 |
Correct |
126 ms |
7104 KB |
Output is correct |
| 46 |
Correct |
46 ms |
5056 KB |
Output is correct |
| 47 |
Correct |
126 ms |
7104 KB |
Output is correct |
| 48 |
Correct |
123 ms |
7104 KB |
Output is correct |
| 49 |
Correct |
66 ms |
7104 KB |
Output is correct |
| 50 |
Correct |
139 ms |
7104 KB |
Output is correct |
| 51 |
Correct |
83 ms |
7104 KB |
Output is correct |
| 52 |
Correct |
119 ms |
7104 KB |
Output is correct |
| 53 |
Correct |
123 ms |
7104 KB |
Output is correct |
| 54 |
Correct |
116 ms |
7104 KB |
Output is correct |
| 55 |
Incorrect |
3 ms |
3072 KB |
Output isn't correct |
| 56 |
Incorrect |
0 ms |
3072 KB |
Output isn't correct |
| 57 |
Incorrect |
0 ms |
3072 KB |
Output isn't correct |
| 58 |
Incorrect |
0 ms |
3072 KB |
Output isn't correct |
| 59 |
Correct |
3 ms |
3072 KB |
Output is correct |
| 60 |
Correct |
0 ms |
3072 KB |
Output is correct |
| 61 |
Incorrect |
0 ms |
3072 KB |
Output isn't correct |
| 62 |
Incorrect |
0 ms |
2932 KB |
Output isn't correct |
| 63 |
Incorrect |
3 ms |
3072 KB |
Output isn't correct |
| 64 |
Correct |
0 ms |
3072 KB |
Output is correct |
| 65 |
Incorrect |
0 ms |
3072 KB |
Output isn't correct |
| 66 |
Incorrect |
3 ms |
3072 KB |
Output isn't correct |
| 67 |
Incorrect |
0 ms |
3072 KB |
Output isn't correct |
| 68 |
Incorrect |
0 ms |
3072 KB |
Output isn't correct |
| 69 |
Incorrect |
0 ms |
3072 KB |
Output isn't correct |
| 70 |
Incorrect |
3 ms |
3072 KB |
Output isn't correct |
| 71 |
Incorrect |
0 ms |
2932 KB |
Output isn't correct |
| 72 |
Correct |
0 ms |
3072 KB |
Output is correct |
| 73 |
Incorrect |
0 ms |
3072 KB |
Output isn't correct |
| 74 |
Correct |
0 ms |
3072 KB |
Output is correct |
| 75 |
Incorrect |
126 ms |
7104 KB |
Output isn't correct |
| 76 |
Incorrect |
76 ms |
5056 KB |
Output isn't correct |
| 77 |
Incorrect |
106 ms |
7104 KB |
Output isn't correct |
| 78 |
Incorrect |
63 ms |
7104 KB |
Output isn't correct |
| 79 |
Correct |
79 ms |
6088 KB |
Output is correct |
| 80 |
Incorrect |
123 ms |
7104 KB |
Output isn't correct |
| 81 |
Incorrect |
0 ms |
3072 KB |
Output isn't correct |
| 82 |
Incorrect |
116 ms |
7104 KB |
Output isn't correct |
| 83 |
Correct |
69 ms |
7104 KB |
Output is correct |
| 84 |
Incorrect |
119 ms |
7104 KB |
Output isn't correct |
| 85 |
Incorrect |
129 ms |
7104 KB |
Output isn't correct |
| 86 |
Incorrect |
119 ms |
7104 KB |
Output isn't correct |
| 87 |
Incorrect |
89 ms |
7104 KB |
Output isn't correct |
| 88 |
Incorrect |
86 ms |
7104 KB |
Output isn't correct |
| 89 |
Incorrect |
133 ms |
7104 KB |
Output isn't correct |
| 90 |
Incorrect |
126 ms |
7104 KB |
Output isn't correct |
| 91 |
Incorrect |
123 ms |
7104 KB |
Output isn't correct |
| 92 |
Correct |
69 ms |
6088 KB |
Output is correct |
| 93 |
Incorrect |
116 ms |
7104 KB |
Output isn't correct |
| 94 |
Incorrect |
116 ms |
7104 KB |
Output isn't correct |
| 95 |
Incorrect |
129 ms |
7104 KB |
Output isn't correct |
