#include<bits/stdc++.h>
#define ll int
#define pb push_back
#define mp make_pair
#define ld long double
#define F first
#define S second
#define pii pair<ll,ll>
using namespace :: std;
const ll maxn=3e4+10;
const ll mod=1e9+7;
const ll inf=1e9+500;
const ll rad=100;
const ll maxm=maxn*(rad)*2+50;
ll b[maxn];
ll p[maxn];
vector<ll> vec[maxn];
vector<pair<ll,short> > ger[maxm];
ll h[maxm];
int main(){
ll n,m;
cin>>n>>m;
for(ll i=0;i<m;i++){
cin>>b[i]>>p[i];
vec[b[i]].pb(i);
}
for(ll i=0;i<n;i++){
for(auto v:vec[i]){
ger[i+m].pb(mp(v,0));
}
}
for(ll j=1;j<rad;j++){
for(ll i=0;i<n;i++){
ger[m+j*n+i].pb(mp(i+m,0));
if(i>=j){
ger[m+j*n+i].pb(mp(m+j*n+i-j,1));
}
}
}
for(ll j=1;j<rad;j++){
for(ll i=0;i<n;i++){
ll v=m+rad*n+(j-1)*n+i;
ger[v].pb(mp(i+m,0));
if(i+j<n){
ger[v].pb(mp(v+j,1));
}
}
}
for(ll i=0;i<m;i++){
if(p[i]<rad){
ll v=b[i];
ger[i].pb(mp(m+n*p[i]+v,0));
ger[i].pb(mp(m+rad*n+(p[i]-1)*n+v,0));
}
}
for(ll i=0;i<m;i++){
if(p[i]>=rad){
for(ll j=b[i];j<n;j+=p[i]){
ger[i].pb(mp(j+m,(j-b[i])/p[i]));
}
for(ll j=b[i]-p[i];j>=0;j-=p[i]){
ger[i].pb(mp(j+m,(b[i]-j)/p[i]));
}
}
}
/*
deque<pii> dk;
dk.pb(mp(1,0));
while(dk.size()){
ll v=dk.front().S;
ll w=dk.front().F;
dk.pop_front();
if(h[v]==0){
h[v]=w;
for(auto e:ger[v]){
if(e.S){
dk.pb(mp(w+1,e.F));
}else{
dk.push_front(mp(w,e.F));
}
}
}
}*/
set<pii> st;
set<pii> :: iterator it;
st.insert(mp(1,0));
while(st.size()){
it=st.begin();
ll v=(*it).S;
ll w=(*it).F;
st.erase(it);
if(h[v]==0){
h[v]=w;
for(auto e:ger[v]){
st.insert(mp(e.S+w,e.F));
}
}
}
if(h[1]==0){
cout<<-1;
}else{
cout<<h[1]-1;
}
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
109 ms |
141944 KB |
Output is correct |
2 |
Correct |
152 ms |
142164 KB |
Output is correct |
3 |
Correct |
112 ms |
142164 KB |
Output is correct |
4 |
Correct |
108 ms |
142188 KB |
Output is correct |
5 |
Correct |
108 ms |
142236 KB |
Output is correct |
6 |
Correct |
109 ms |
142344 KB |
Output is correct |
7 |
Correct |
110 ms |
142344 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
108 ms |
142344 KB |
Output is correct |
2 |
Correct |
111 ms |
142344 KB |
Output is correct |
3 |
Correct |
110 ms |
142400 KB |
Output is correct |
4 |
Correct |
112 ms |
142416 KB |
Output is correct |
5 |
Correct |
128 ms |
142416 KB |
Output is correct |
6 |
Correct |
111 ms |
142416 KB |
Output is correct |
7 |
Correct |
110 ms |
142416 KB |
Output is correct |
8 |
Correct |
129 ms |
142444 KB |
Output is correct |
9 |
Correct |
107 ms |
142676 KB |
Output is correct |
10 |
Correct |
111 ms |
142956 KB |
Output is correct |
11 |
Correct |
114 ms |
143180 KB |
Output is correct |
12 |
Correct |
131 ms |
143212 KB |
Output is correct |
13 |
Correct |
111 ms |
143212 KB |
Output is correct |
14 |
Correct |
113 ms |
143212 KB |
Output is correct |
15 |
Correct |
113 ms |
143228 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
112 ms |
143228 KB |
Output is correct |
2 |
Correct |
115 ms |
143228 KB |
Output is correct |
3 |
Correct |
110 ms |
143228 KB |
Output is correct |
4 |
Correct |
109 ms |
143228 KB |
Output is correct |
5 |
Correct |
113 ms |
143228 KB |
Output is correct |
6 |
Correct |
117 ms |
143228 KB |
Output is correct |
7 |
Correct |
122 ms |
143228 KB |
Output is correct |
8 |
Correct |
111 ms |
143228 KB |
Output is correct |
9 |
Correct |
113 ms |
143228 KB |
Output is correct |
10 |
Correct |
119 ms |
143228 KB |
Output is correct |
11 |
Correct |
116 ms |
143228 KB |
Output is correct |
12 |
Correct |
120 ms |
143228 KB |
Output is correct |
13 |
Correct |
115 ms |
143228 KB |
Output is correct |
14 |
Correct |
125 ms |
143228 KB |
Output is correct |
15 |
Correct |
120 ms |
143228 KB |
Output is correct |
16 |
Correct |
124 ms |
143740 KB |
Output is correct |
17 |
Correct |
135 ms |
147708 KB |
Output is correct |
18 |
Correct |
151 ms |
153176 KB |
Output is correct |
19 |
Correct |
163 ms |
154784 KB |
Output is correct |
20 |
Correct |
173 ms |
154960 KB |
Output is correct |
21 |
Correct |
126 ms |
154960 KB |
Output is correct |
22 |
Correct |
158 ms |
154960 KB |
Output is correct |
23 |
Correct |
274 ms |
154960 KB |
Output is correct |
24 |
Correct |
158 ms |
155328 KB |
Output is correct |
25 |
Correct |
159 ms |
155328 KB |
Output is correct |
26 |
Correct |
157 ms |
156040 KB |
Output is correct |
27 |
Correct |
156 ms |
156040 KB |
Output is correct |
28 |
Correct |
160 ms |
156040 KB |
Output is correct |
29 |
Correct |
182 ms |
156040 KB |
Output is correct |
30 |
Correct |
163 ms |
156040 KB |
Output is correct |
31 |
Correct |
164 ms |
156040 KB |
Output is correct |
32 |
Correct |
164 ms |
156040 KB |
Output is correct |
33 |
Correct |
187 ms |
156040 KB |
Output is correct |
34 |
Correct |
194 ms |
156040 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
110 ms |
156040 KB |
Output is correct |
2 |
Correct |
108 ms |
156040 KB |
Output is correct |
3 |
Correct |
127 ms |
156040 KB |
Output is correct |
4 |
Correct |
109 ms |
156040 KB |
Output is correct |
5 |
Correct |
112 ms |
156040 KB |
Output is correct |
6 |
Correct |
117 ms |
156040 KB |
Output is correct |
7 |
Correct |
115 ms |
156040 KB |
Output is correct |
8 |
Correct |
120 ms |
156040 KB |
Output is correct |
9 |
Correct |
110 ms |
156040 KB |
Output is correct |
10 |
Correct |
125 ms |
156040 KB |
Output is correct |
11 |
Correct |
113 ms |
156040 KB |
Output is correct |
12 |
Correct |
127 ms |
156040 KB |
Output is correct |
13 |
Correct |
147 ms |
156040 KB |
Output is correct |
14 |
Correct |
140 ms |
156040 KB |
Output is correct |
15 |
Correct |
133 ms |
156040 KB |
Output is correct |
16 |
Correct |
130 ms |
156040 KB |
Output is correct |
17 |
Correct |
193 ms |
156040 KB |
Output is correct |
18 |
Correct |
175 ms |
156040 KB |
Output is correct |
19 |
Correct |
165 ms |
156040 KB |
Output is correct |
20 |
Correct |
169 ms |
156040 KB |
Output is correct |
21 |
Correct |
120 ms |
156040 KB |
Output is correct |
22 |
Correct |
153 ms |
156040 KB |
Output is correct |
23 |
Correct |
155 ms |
156040 KB |
Output is correct |
24 |
Correct |
166 ms |
156040 KB |
Output is correct |
25 |
Correct |
164 ms |
156040 KB |
Output is correct |
26 |
Correct |
172 ms |
156248 KB |
Output is correct |
27 |
Correct |
164 ms |
156248 KB |
Output is correct |
28 |
Correct |
207 ms |
156336 KB |
Output is correct |
29 |
Correct |
217 ms |
156336 KB |
Output is correct |
30 |
Correct |
186 ms |
156336 KB |
Output is correct |
31 |
Correct |
170 ms |
156336 KB |
Output is correct |
32 |
Correct |
172 ms |
156336 KB |
Output is correct |
33 |
Correct |
194 ms |
156336 KB |
Output is correct |
34 |
Correct |
198 ms |
156336 KB |
Output is correct |
35 |
Correct |
208 ms |
156336 KB |
Output is correct |
36 |
Correct |
146 ms |
156336 KB |
Output is correct |
37 |
Correct |
268 ms |
159804 KB |
Output is correct |
38 |
Correct |
248 ms |
160556 KB |
Output is correct |
39 |
Correct |
252 ms |
160760 KB |
Output is correct |
40 |
Correct |
256 ms |
161208 KB |
Output is correct |
41 |
Correct |
249 ms |
161344 KB |
Output is correct |
42 |
Correct |
203 ms |
161344 KB |
Output is correct |
43 |
Correct |
186 ms |
161344 KB |
Output is correct |
44 |
Correct |
189 ms |
161344 KB |
Output is correct |
45 |
Correct |
306 ms |
164152 KB |
Output is correct |
46 |
Correct |
306 ms |
164416 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
111 ms |
164416 KB |
Output is correct |
2 |
Correct |
117 ms |
164416 KB |
Output is correct |
3 |
Correct |
112 ms |
164416 KB |
Output is correct |
4 |
Correct |
113 ms |
164416 KB |
Output is correct |
5 |
Correct |
109 ms |
164416 KB |
Output is correct |
6 |
Correct |
110 ms |
164416 KB |
Output is correct |
7 |
Correct |
113 ms |
164416 KB |
Output is correct |
8 |
Correct |
112 ms |
164416 KB |
Output is correct |
9 |
Correct |
145 ms |
164416 KB |
Output is correct |
10 |
Correct |
116 ms |
164416 KB |
Output is correct |
11 |
Correct |
118 ms |
164416 KB |
Output is correct |
12 |
Correct |
112 ms |
164416 KB |
Output is correct |
13 |
Correct |
113 ms |
164416 KB |
Output is correct |
14 |
Correct |
113 ms |
164416 KB |
Output is correct |
15 |
Correct |
118 ms |
164416 KB |
Output is correct |
16 |
Correct |
115 ms |
164416 KB |
Output is correct |
17 |
Correct |
136 ms |
164416 KB |
Output is correct |
18 |
Correct |
151 ms |
164416 KB |
Output is correct |
19 |
Correct |
155 ms |
164416 KB |
Output is correct |
20 |
Correct |
170 ms |
164416 KB |
Output is correct |
21 |
Correct |
120 ms |
164416 KB |
Output is correct |
22 |
Correct |
152 ms |
164416 KB |
Output is correct |
23 |
Correct |
152 ms |
164416 KB |
Output is correct |
24 |
Correct |
158 ms |
164416 KB |
Output is correct |
25 |
Correct |
156 ms |
164416 KB |
Output is correct |
26 |
Correct |
158 ms |
164416 KB |
Output is correct |
27 |
Correct |
158 ms |
164416 KB |
Output is correct |
28 |
Correct |
159 ms |
164416 KB |
Output is correct |
29 |
Correct |
187 ms |
164416 KB |
Output is correct |
30 |
Correct |
158 ms |
164416 KB |
Output is correct |
31 |
Correct |
169 ms |
164416 KB |
Output is correct |
32 |
Correct |
164 ms |
164416 KB |
Output is correct |
33 |
Correct |
196 ms |
164416 KB |
Output is correct |
34 |
Correct |
190 ms |
164416 KB |
Output is correct |
35 |
Correct |
209 ms |
164416 KB |
Output is correct |
36 |
Correct |
145 ms |
164416 KB |
Output is correct |
37 |
Correct |
246 ms |
164416 KB |
Output is correct |
38 |
Correct |
267 ms |
164416 KB |
Output is correct |
39 |
Correct |
252 ms |
164416 KB |
Output is correct |
40 |
Correct |
252 ms |
164416 KB |
Output is correct |
41 |
Correct |
261 ms |
164416 KB |
Output is correct |
42 |
Correct |
193 ms |
164416 KB |
Output is correct |
43 |
Correct |
189 ms |
164416 KB |
Output is correct |
44 |
Correct |
211 ms |
164416 KB |
Output is correct |
45 |
Correct |
308 ms |
166836 KB |
Output is correct |
46 |
Correct |
324 ms |
167068 KB |
Output is correct |
47 |
Correct |
878 ms |
249396 KB |
Output is correct |
48 |
Execution timed out |
1110 ms |
262144 KB |
Time limit exceeded |
49 |
Halted |
0 ms |
0 KB |
- |