| # |
제출 시각 |
아이디 |
문제 |
언어 |
결과 |
실행 시간 |
메모리 |
| 20366 |
2017-02-07T08:43:43 Z |
|
초음속철도 (OJUZ11_rail) |
C++ |
|
629 ms |
253388 KB |
#include <cstdio>
#include <cstring>
#include <algorithm>
using namespace std;
typedef long long ll;
#define MOD (ll)(1e9+7)
int N,M;
const int MAX_M = 5010;
ll dp[MAX_M][MAX_M];
ll dp2[400010];
struct pt{
int s,e;
pt(){}
pt(int s_,int e_):s(s_),e(e_){}
bool operator<(const pt& r)const{
return s!=r.s?s<r.s:e<r.e;
}
}a[MAX_M];
ll pw(ll x,ll y){
ll ret=1;
while(y){
if(y&1)ret=(ret*x)%MOD;
x=(x*x)%MOD;
y>>=1;
}
return ret;
}
ll f(int x,int lim){
if(x>M)return a[lim].e==N;
if(a[lim].e<a[x].s)return 0;
ll& ret=dp[x][lim];
if(~ret)return ret;
ret=(f(x+1,lim)+f(x+1,a[lim].e<a[x].e?x:lim))%MOD;
return ret;
}
ll f2(int x){
if(x==N)return 1;
ll& ret=dp2[x];
if(~ret)return ret;
ret=0;
int L=lower_bound(a+1,a+M+1,pt(x,0))-a;
int R=lower_bound(a+1,a+M+1,pt(x+1,0))-a;
for(int i=L;i<R;i++){
ret+=f2(a[i].e);
ret%=MOD;
}
return ret;
}
int cmp[400010],sz;
int main(){
memset(dp,-1,sizeof(dp));
memset(dp2,-1,sizeof(dp2));
scanf("%d%d",&N,&M);
a[0]=pt{1,1};
cmp[sz++]=1;cmp[sz++]=N;
for(int i=1,x,y;i<=M;i++){
scanf("%d%d",&x,&y);
a[i]=pt(x,y);
cmp[sz++]=x;
cmp[sz++]=y;
}
sort(cmp,cmp+sz);
sz=unique(cmp,cmp+sz)-cmp;
for(int i=0;i<=M;i++){
a[i].s=lower_bound(cmp,cmp+sz,a[i].s)-cmp;
a[i].e=lower_bound(cmp,cmp+sz,a[i].e)-cmp;
}
N=lower_bound(cmp,cmp+sz,N)-cmp;
sort(a+1,a+M+1);
if(M>=MAX_M){
printf("%lld\n",f2(0));
}
printf("%lld\n",f(1,0));
return 0;
}
Compilation message
rail.cpp: In function 'int main()':
rail.cpp:65:9: warning: extended initializer lists only available with -std=c++11 or -std=gnu++11
a[0]=pt{1,1};
^
rail.cpp:63:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d",&N,&M);
^
rail.cpp:68:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d",&x,&y);
^
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
125 ms |
199812 KB |
Output is correct |
| 2 |
Correct |
127 ms |
199864 KB |
Output is correct |
| 3 |
Correct |
127 ms |
199892 KB |
Output is correct |
| 4 |
Correct |
128 ms |
199892 KB |
Output is correct |
| 5 |
Correct |
128 ms |
199892 KB |
Output is correct |
| 6 |
Correct |
127 ms |
199892 KB |
Output is correct |
| 7 |
Correct |
127 ms |
199892 KB |
Output is correct |
| 8 |
Correct |
126 ms |
199892 KB |
Output is correct |
| 9 |
Correct |
125 ms |
199892 KB |
Output is correct |
| 10 |
Correct |
128 ms |
199896 KB |
Output is correct |
| 11 |
Correct |
126 ms |
199948 KB |
Output is correct |
| 12 |
Correct |
125 ms |
199948 KB |
Output is correct |
| 13 |
Correct |
125 ms |
199948 KB |
Output is correct |
| 14 |
Correct |
135 ms |
199952 KB |
Output is correct |
| 15 |
Correct |
133 ms |
199952 KB |
Output is correct |
| 16 |
Correct |
138 ms |
199952 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
125 ms |
199812 KB |
Output is correct |
| 2 |
Correct |
127 ms |
199864 KB |
Output is correct |
| 3 |
Correct |
127 ms |
199892 KB |
Output is correct |
| 4 |
Correct |
128 ms |
199892 KB |
Output is correct |
| 5 |
Correct |
128 ms |
199892 KB |
Output is correct |
| 6 |
Correct |
127 ms |
199892 KB |
Output is correct |
| 7 |
Correct |
127 ms |
199892 KB |
Output is correct |
| 8 |
Correct |
126 ms |
199892 KB |
Output is correct |
| 9 |
Correct |
125 ms |
199892 KB |
Output is correct |
| 10 |
Correct |
128 ms |
199896 KB |
Output is correct |
| 11 |
Correct |
126 ms |
199948 KB |
Output is correct |
| 12 |
Correct |
125 ms |
199948 KB |
Output is correct |
| 13 |
Correct |
125 ms |
199948 KB |
Output is correct |
| 14 |
Correct |
135 ms |
199952 KB |
Output is correct |
| 15 |
Correct |
133 ms |
199952 KB |
Output is correct |
| 16 |
Correct |
138 ms |
199952 KB |
Output is correct |
| 17 |
Correct |
135 ms |
199952 KB |
Output is correct |
| 18 |
Correct |
129 ms |
199952 KB |
Output is correct |
| 19 |
Correct |
127 ms |
199952 KB |
Output is correct |
| 20 |
Correct |
127 ms |
199952 KB |
Output is correct |
| 21 |
Correct |
132 ms |
199952 KB |
Output is correct |
| 22 |
Correct |
127 ms |
199952 KB |
Output is correct |
| 23 |
Correct |
127 ms |
199952 KB |
Output is correct |
| 24 |
Correct |
127 ms |
199952 KB |
Output is correct |
| 25 |
Correct |
132 ms |
199952 KB |
Output is correct |
| 26 |
Correct |
126 ms |
199952 KB |
Output is correct |
| 27 |
Correct |
126 ms |
199952 KB |
Output is correct |
| 28 |
Correct |
129 ms |
199952 KB |
Output is correct |
| 29 |
Correct |
144 ms |
199952 KB |
Output is correct |
| 30 |
Correct |
126 ms |
199952 KB |
Output is correct |
| 31 |
Correct |
128 ms |
199952 KB |
Output is correct |
| 32 |
Correct |
129 ms |
199952 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
128 ms |
199952 KB |
Output is correct |
| 2 |
Correct |
129 ms |
199956 KB |
Output is correct |
| 3 |
Correct |
126 ms |
199956 KB |
Output is correct |
| 4 |
Correct |
502 ms |
200464 KB |
Output is correct |
| 5 |
Incorrect |
278 ms |
201996 KB |
Output isn't correct |
| 6 |
Incorrect |
317 ms |
201996 KB |
Output isn't correct |
| 7 |
Incorrect |
298 ms |
201996 KB |
Output isn't correct |
| 8 |
Correct |
127 ms |
201996 KB |
Output is correct |
| 9 |
Incorrect |
297 ms |
201996 KB |
Output isn't correct |
| 10 |
Incorrect |
311 ms |
201996 KB |
Output isn't correct |
| 11 |
Runtime error |
232 ms |
252088 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 12 |
Incorrect |
332 ms |
252808 KB |
Output isn't correct |
| 13 |
Incorrect |
306 ms |
252808 KB |
Output isn't correct |
| 14 |
Runtime error |
246 ms |
253272 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 15 |
Runtime error |
259 ms |
253272 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 16 |
Incorrect |
326 ms |
253272 KB |
Output isn't correct |
| 17 |
Incorrect |
331 ms |
253272 KB |
Output isn't correct |
| 18 |
Incorrect |
318 ms |
253272 KB |
Output isn't correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
125 ms |
199812 KB |
Output is correct |
| 2 |
Correct |
127 ms |
199864 KB |
Output is correct |
| 3 |
Correct |
127 ms |
199892 KB |
Output is correct |
| 4 |
Correct |
128 ms |
199892 KB |
Output is correct |
| 5 |
Correct |
128 ms |
199892 KB |
Output is correct |
| 6 |
Correct |
127 ms |
199892 KB |
Output is correct |
| 7 |
Correct |
127 ms |
199892 KB |
Output is correct |
| 8 |
Correct |
126 ms |
199892 KB |
Output is correct |
| 9 |
Correct |
125 ms |
199892 KB |
Output is correct |
| 10 |
Correct |
128 ms |
199896 KB |
Output is correct |
| 11 |
Correct |
126 ms |
199948 KB |
Output is correct |
| 12 |
Correct |
125 ms |
199948 KB |
Output is correct |
| 13 |
Correct |
125 ms |
199948 KB |
Output is correct |
| 14 |
Correct |
135 ms |
199952 KB |
Output is correct |
| 15 |
Correct |
133 ms |
199952 KB |
Output is correct |
| 16 |
Correct |
138 ms |
199952 KB |
Output is correct |
| 17 |
Correct |
135 ms |
199952 KB |
Output is correct |
| 18 |
Correct |
129 ms |
199952 KB |
Output is correct |
| 19 |
Correct |
127 ms |
199952 KB |
Output is correct |
| 20 |
Correct |
127 ms |
199952 KB |
Output is correct |
| 21 |
Correct |
132 ms |
199952 KB |
Output is correct |
| 22 |
Correct |
127 ms |
199952 KB |
Output is correct |
| 23 |
Correct |
127 ms |
199952 KB |
Output is correct |
| 24 |
Correct |
127 ms |
199952 KB |
Output is correct |
| 25 |
Correct |
132 ms |
199952 KB |
Output is correct |
| 26 |
Correct |
126 ms |
199952 KB |
Output is correct |
| 27 |
Correct |
126 ms |
199952 KB |
Output is correct |
| 28 |
Correct |
129 ms |
199952 KB |
Output is correct |
| 29 |
Correct |
144 ms |
199952 KB |
Output is correct |
| 30 |
Correct |
126 ms |
199952 KB |
Output is correct |
| 31 |
Correct |
128 ms |
199952 KB |
Output is correct |
| 32 |
Correct |
129 ms |
199952 KB |
Output is correct |
| 33 |
Correct |
412 ms |
253272 KB |
Output is correct |
| 34 |
Correct |
411 ms |
253272 KB |
Output is correct |
| 35 |
Correct |
389 ms |
253272 KB |
Output is correct |
| 36 |
Correct |
629 ms |
253272 KB |
Output is correct |
| 37 |
Correct |
130 ms |
253272 KB |
Output is correct |
| 38 |
Correct |
286 ms |
253272 KB |
Output is correct |
| 39 |
Correct |
132 ms |
253272 KB |
Output is correct |
| 40 |
Correct |
545 ms |
253272 KB |
Output is correct |
| 41 |
Correct |
553 ms |
253272 KB |
Output is correct |
| 42 |
Correct |
562 ms |
253272 KB |
Output is correct |
| 43 |
Correct |
475 ms |
253272 KB |
Output is correct |
| 44 |
Correct |
529 ms |
253272 KB |
Output is correct |
| 45 |
Correct |
579 ms |
253272 KB |
Output is correct |
| 46 |
Correct |
560 ms |
253272 KB |
Output is correct |
| 47 |
Correct |
575 ms |
253272 KB |
Output is correct |
| 48 |
Correct |
143 ms |
253272 KB |
Output is correct |
| 49 |
Correct |
139 ms |
253272 KB |
Output is correct |
| 50 |
Correct |
248 ms |
253272 KB |
Output is correct |
| 51 |
Correct |
136 ms |
253272 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
125 ms |
199812 KB |
Output is correct |
| 2 |
Correct |
127 ms |
199864 KB |
Output is correct |
| 3 |
Correct |
127 ms |
199892 KB |
Output is correct |
| 4 |
Correct |
128 ms |
199892 KB |
Output is correct |
| 5 |
Correct |
128 ms |
199892 KB |
Output is correct |
| 6 |
Correct |
127 ms |
199892 KB |
Output is correct |
| 7 |
Correct |
127 ms |
199892 KB |
Output is correct |
| 8 |
Correct |
126 ms |
199892 KB |
Output is correct |
| 9 |
Correct |
125 ms |
199892 KB |
Output is correct |
| 10 |
Correct |
128 ms |
199896 KB |
Output is correct |
| 11 |
Correct |
126 ms |
199948 KB |
Output is correct |
| 12 |
Correct |
125 ms |
199948 KB |
Output is correct |
| 13 |
Correct |
125 ms |
199948 KB |
Output is correct |
| 14 |
Correct |
135 ms |
199952 KB |
Output is correct |
| 15 |
Correct |
133 ms |
199952 KB |
Output is correct |
| 16 |
Correct |
138 ms |
199952 KB |
Output is correct |
| 17 |
Correct |
135 ms |
199952 KB |
Output is correct |
| 18 |
Correct |
129 ms |
199952 KB |
Output is correct |
| 19 |
Correct |
127 ms |
199952 KB |
Output is correct |
| 20 |
Correct |
127 ms |
199952 KB |
Output is correct |
| 21 |
Correct |
132 ms |
199952 KB |
Output is correct |
| 22 |
Correct |
127 ms |
199952 KB |
Output is correct |
| 23 |
Correct |
127 ms |
199952 KB |
Output is correct |
| 24 |
Correct |
127 ms |
199952 KB |
Output is correct |
| 25 |
Correct |
132 ms |
199952 KB |
Output is correct |
| 26 |
Correct |
126 ms |
199952 KB |
Output is correct |
| 27 |
Correct |
126 ms |
199952 KB |
Output is correct |
| 28 |
Correct |
129 ms |
199952 KB |
Output is correct |
| 29 |
Correct |
144 ms |
199952 KB |
Output is correct |
| 30 |
Correct |
126 ms |
199952 KB |
Output is correct |
| 31 |
Correct |
128 ms |
199952 KB |
Output is correct |
| 32 |
Correct |
129 ms |
199952 KB |
Output is correct |
| 33 |
Correct |
128 ms |
199952 KB |
Output is correct |
| 34 |
Correct |
129 ms |
199956 KB |
Output is correct |
| 35 |
Correct |
126 ms |
199956 KB |
Output is correct |
| 36 |
Correct |
502 ms |
200464 KB |
Output is correct |
| 37 |
Incorrect |
278 ms |
201996 KB |
Output isn't correct |
| 38 |
Incorrect |
317 ms |
201996 KB |
Output isn't correct |
| 39 |
Incorrect |
298 ms |
201996 KB |
Output isn't correct |
| 40 |
Correct |
127 ms |
201996 KB |
Output is correct |
| 41 |
Incorrect |
297 ms |
201996 KB |
Output isn't correct |
| 42 |
Incorrect |
311 ms |
201996 KB |
Output isn't correct |
| 43 |
Runtime error |
232 ms |
252088 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 44 |
Incorrect |
332 ms |
252808 KB |
Output isn't correct |
| 45 |
Incorrect |
306 ms |
252808 KB |
Output isn't correct |
| 46 |
Runtime error |
246 ms |
253272 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 47 |
Runtime error |
259 ms |
253272 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 48 |
Incorrect |
326 ms |
253272 KB |
Output isn't correct |
| 49 |
Incorrect |
331 ms |
253272 KB |
Output isn't correct |
| 50 |
Incorrect |
318 ms |
253272 KB |
Output isn't correct |
| 51 |
Correct |
412 ms |
253272 KB |
Output is correct |
| 52 |
Correct |
411 ms |
253272 KB |
Output is correct |
| 53 |
Correct |
389 ms |
253272 KB |
Output is correct |
| 54 |
Correct |
629 ms |
253272 KB |
Output is correct |
| 55 |
Correct |
130 ms |
253272 KB |
Output is correct |
| 56 |
Correct |
286 ms |
253272 KB |
Output is correct |
| 57 |
Correct |
132 ms |
253272 KB |
Output is correct |
| 58 |
Correct |
545 ms |
253272 KB |
Output is correct |
| 59 |
Correct |
553 ms |
253272 KB |
Output is correct |
| 60 |
Correct |
562 ms |
253272 KB |
Output is correct |
| 61 |
Correct |
475 ms |
253272 KB |
Output is correct |
| 62 |
Correct |
529 ms |
253272 KB |
Output is correct |
| 63 |
Correct |
579 ms |
253272 KB |
Output is correct |
| 64 |
Correct |
560 ms |
253272 KB |
Output is correct |
| 65 |
Correct |
575 ms |
253272 KB |
Output is correct |
| 66 |
Correct |
143 ms |
253272 KB |
Output is correct |
| 67 |
Correct |
139 ms |
253272 KB |
Output is correct |
| 68 |
Correct |
248 ms |
253272 KB |
Output is correct |
| 69 |
Correct |
136 ms |
253272 KB |
Output is correct |
| 70 |
Runtime error |
400 ms |
253312 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 71 |
Runtime error |
338 ms |
253312 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 72 |
Runtime error |
317 ms |
253312 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 73 |
Runtime error |
238 ms |
253312 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 74 |
Incorrect |
288 ms |
253312 KB |
Output isn't correct |
| 75 |
Runtime error |
381 ms |
253372 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 76 |
Correct |
517 ms |
253372 KB |
Output is correct |
| 77 |
Runtime error |
367 ms |
253372 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 78 |
Runtime error |
235 ms |
253372 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 79 |
Runtime error |
348 ms |
253372 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 80 |
Runtime error |
399 ms |
253372 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 81 |
Runtime error |
390 ms |
253372 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 82 |
Runtime error |
284 ms |
253372 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 83 |
Runtime error |
276 ms |
253372 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 84 |
Runtime error |
380 ms |
253372 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 85 |
Runtime error |
387 ms |
253388 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 86 |
Runtime error |
389 ms |
253388 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 87 |
Incorrect |
320 ms |
253388 KB |
Output isn't correct |
| 88 |
Runtime error |
390 ms |
253388 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 89 |
Runtime error |
389 ms |
253388 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 90 |
Runtime error |
405 ms |
253388 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
