#include <bits/stdc++.h>
using namespace std;
#define ll long long
const int N=200050;
int n,m,a[N],b[N],c[N];
int heap[N],tsz;
void Push(int x)
{
heap[++tsz]=x;
for(int i=tsz;i>1 && b[heap[i]]>b[heap[i>>1]];i>>=1) swap(heap[i],heap[i>>1]);
}
void Pop()
{
heap[1]=heap[tsz--];
for(int i=1,j;i*2<=tsz;i=j)
{
j=i*2;
if(j!=tsz && b[heap[j+1]]>b[heap[j]]) j++;
if(b[heap[j]]>b[heap[i]]) swap(heap[i],heap[j]);
else break;
}
}
ll sum[N],need[N],add[N],ost[N];
vector<int> ids[N];
bool Check(ll mid, int pos, ll flip)
{
for(int i=1;i<=n;i++) add[i]=0;
for(int i=1;i<pos;i++) need[i]=(sum[i]+flip-mid+1)/2;
need[pos]=flip;
tsz=0;
ll done=0;
for(int i=1;i<=pos;i++)
{
for(int j:ids[i]) if(a[j]<=pos && pos<b[j]) Push(j),ost[j]=c[j];
while(tsz && done<need[i])
{
int j=heap[1];
ll work=min(ost[j],need[i]-done);
done+=work;
ost[j]-=work;
add[1]+=work;
add[a[j]]-=2*work;
add[b[j]]+=2*work;
if(!ost[j]) Pop();
}
if(done<need[i]) return 0;
}
for(int i=1;i<=n;i++)
{
add[i]+=add[i-1];
if(add[i]+sum[i]>mid) return 0;
}
return 1;
}
int main()
{
scanf("%i %i",&n,&m);
for(int i=1;i<=m;i++)
{
scanf("%i %i %i",&a[i],&b[i],&c[i]);
if(a[i]>b[i]) swap(a[i],b[i]);
sum[a[i]]+=c[i];
sum[b[i]]-=c[i];
ids[a[i]].push_back(i);
}
int fir=0,las=0;
for(int i=1;i<=n;i++)
{
sum[i]+=sum[i-1];
if(sum[i]>sum[fir]) fir=i;
if(sum[i]==sum[fir]) las=i;
}
ll top=sum[fir],bot=0,mid,ans=top;
while(top>=bot)
{
mid=top+bot>>1;
if(Check(mid,fir,sum[fir]-mid)||Check(mid,fir,sum[fir]-mid+1)
||Check(mid,las,sum[las]-mid)||Check(mid,las,sum[las]-mid+1)) ans=mid,top=mid-1;
else bot=mid+1;
}
printf("%lld\n",ans);
return 0;
}
Compilation message
arranging_tickets.cpp: In function 'int main()':
arranging_tickets.cpp:57:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%i %i",&n,&m);
~~~~~^~~~~~~~~~~~~~~
arranging_tickets.cpp:60:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%i %i %i",&a[i],&b[i],&c[i]);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
7 ms |
5120 KB |
Output is correct |
2 |
Correct |
6 ms |
4992 KB |
Output is correct |
3 |
Correct |
8 ms |
4992 KB |
Output is correct |
4 |
Correct |
9 ms |
5120 KB |
Output is correct |
5 |
Correct |
8 ms |
4992 KB |
Output is correct |
6 |
Correct |
7 ms |
4992 KB |
Output is correct |
7 |
Correct |
8 ms |
4988 KB |
Output is correct |
8 |
Correct |
9 ms |
4992 KB |
Output is correct |
9 |
Correct |
8 ms |
5120 KB |
Output is correct |
10 |
Correct |
6 ms |
4992 KB |
Output is correct |
11 |
Correct |
6 ms |
4992 KB |
Output is correct |
12 |
Correct |
6 ms |
4992 KB |
Output is correct |
13 |
Correct |
7 ms |
4992 KB |
Output is correct |
14 |
Correct |
7 ms |
5120 KB |
Output is correct |
15 |
Correct |
8 ms |
5120 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
7 ms |
5120 KB |
Output is correct |
2 |
Correct |
6 ms |
4992 KB |
Output is correct |
3 |
Correct |
8 ms |
4992 KB |
Output is correct |
4 |
Correct |
9 ms |
5120 KB |
Output is correct |
5 |
Correct |
8 ms |
4992 KB |
Output is correct |
6 |
Correct |
7 ms |
4992 KB |
Output is correct |
7 |
Correct |
8 ms |
4988 KB |
Output is correct |
8 |
Correct |
9 ms |
4992 KB |
Output is correct |
9 |
Correct |
8 ms |
5120 KB |
Output is correct |
10 |
Correct |
6 ms |
4992 KB |
Output is correct |
11 |
Correct |
6 ms |
4992 KB |
Output is correct |
12 |
Correct |
6 ms |
4992 KB |
Output is correct |
13 |
Correct |
7 ms |
4992 KB |
Output is correct |
14 |
Correct |
7 ms |
5120 KB |
Output is correct |
15 |
Correct |
8 ms |
5120 KB |
Output is correct |
16 |
Correct |
7 ms |
5120 KB |
Output is correct |
17 |
Correct |
8 ms |
5120 KB |
Output is correct |
18 |
Correct |
8 ms |
5068 KB |
Output is correct |
19 |
Correct |
7 ms |
5120 KB |
Output is correct |
20 |
Correct |
8 ms |
5120 KB |
Output is correct |
21 |
Correct |
8 ms |
5120 KB |
Output is correct |
22 |
Correct |
5 ms |
5068 KB |
Output is correct |
23 |
Correct |
7 ms |
5120 KB |
Output is correct |
24 |
Correct |
6 ms |
5120 KB |
Output is correct |
25 |
Correct |
7 ms |
5120 KB |
Output is correct |
26 |
Correct |
7 ms |
5104 KB |
Output is correct |
27 |
Correct |
8 ms |
5120 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
7 ms |
5120 KB |
Output is correct |
2 |
Correct |
6 ms |
4992 KB |
Output is correct |
3 |
Correct |
8 ms |
4992 KB |
Output is correct |
4 |
Correct |
9 ms |
5120 KB |
Output is correct |
5 |
Correct |
8 ms |
4992 KB |
Output is correct |
6 |
Correct |
7 ms |
4992 KB |
Output is correct |
7 |
Correct |
8 ms |
4988 KB |
Output is correct |
8 |
Correct |
9 ms |
4992 KB |
Output is correct |
9 |
Correct |
8 ms |
5120 KB |
Output is correct |
10 |
Correct |
6 ms |
4992 KB |
Output is correct |
11 |
Correct |
6 ms |
4992 KB |
Output is correct |
12 |
Correct |
6 ms |
4992 KB |
Output is correct |
13 |
Correct |
7 ms |
4992 KB |
Output is correct |
14 |
Correct |
7 ms |
5120 KB |
Output is correct |
15 |
Correct |
8 ms |
5120 KB |
Output is correct |
16 |
Correct |
7 ms |
5120 KB |
Output is correct |
17 |
Correct |
8 ms |
5120 KB |
Output is correct |
18 |
Correct |
8 ms |
5068 KB |
Output is correct |
19 |
Correct |
7 ms |
5120 KB |
Output is correct |
20 |
Correct |
8 ms |
5120 KB |
Output is correct |
21 |
Correct |
8 ms |
5120 KB |
Output is correct |
22 |
Correct |
5 ms |
5068 KB |
Output is correct |
23 |
Correct |
7 ms |
5120 KB |
Output is correct |
24 |
Correct |
6 ms |
5120 KB |
Output is correct |
25 |
Correct |
7 ms |
5120 KB |
Output is correct |
26 |
Correct |
7 ms |
5104 KB |
Output is correct |
27 |
Correct |
8 ms |
5120 KB |
Output is correct |
28 |
Correct |
10 ms |
5248 KB |
Output is correct |
29 |
Correct |
13 ms |
5296 KB |
Output is correct |
30 |
Correct |
12 ms |
5248 KB |
Output is correct |
31 |
Correct |
10 ms |
5248 KB |
Output is correct |
32 |
Correct |
12 ms |
5376 KB |
Output is correct |
33 |
Correct |
10 ms |
5248 KB |
Output is correct |
34 |
Correct |
11 ms |
5248 KB |
Output is correct |
35 |
Correct |
12 ms |
5248 KB |
Output is correct |
36 |
Correct |
10 ms |
5248 KB |
Output is correct |
37 |
Correct |
9 ms |
5248 KB |
Output is correct |
38 |
Correct |
9 ms |
5248 KB |
Output is correct |
39 |
Correct |
9 ms |
5248 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
7 ms |
5120 KB |
Output is correct |
2 |
Correct |
6 ms |
4992 KB |
Output is correct |
3 |
Correct |
8 ms |
4992 KB |
Output is correct |
4 |
Correct |
9 ms |
5120 KB |
Output is correct |
5 |
Correct |
8 ms |
4992 KB |
Output is correct |
6 |
Correct |
7 ms |
4992 KB |
Output is correct |
7 |
Correct |
8 ms |
4988 KB |
Output is correct |
8 |
Correct |
9 ms |
4992 KB |
Output is correct |
9 |
Correct |
8 ms |
5120 KB |
Output is correct |
10 |
Correct |
6 ms |
4992 KB |
Output is correct |
11 |
Correct |
6 ms |
4992 KB |
Output is correct |
12 |
Correct |
6 ms |
4992 KB |
Output is correct |
13 |
Correct |
7 ms |
4992 KB |
Output is correct |
14 |
Correct |
7 ms |
5120 KB |
Output is correct |
15 |
Correct |
8 ms |
5120 KB |
Output is correct |
16 |
Correct |
7 ms |
5120 KB |
Output is correct |
17 |
Correct |
8 ms |
5120 KB |
Output is correct |
18 |
Correct |
8 ms |
5068 KB |
Output is correct |
19 |
Correct |
7 ms |
5120 KB |
Output is correct |
20 |
Correct |
8 ms |
5120 KB |
Output is correct |
21 |
Correct |
8 ms |
5120 KB |
Output is correct |
22 |
Correct |
5 ms |
5068 KB |
Output is correct |
23 |
Correct |
7 ms |
5120 KB |
Output is correct |
24 |
Correct |
6 ms |
5120 KB |
Output is correct |
25 |
Correct |
7 ms |
5120 KB |
Output is correct |
26 |
Correct |
7 ms |
5104 KB |
Output is correct |
27 |
Correct |
8 ms |
5120 KB |
Output is correct |
28 |
Correct |
10 ms |
5248 KB |
Output is correct |
29 |
Correct |
13 ms |
5296 KB |
Output is correct |
30 |
Correct |
12 ms |
5248 KB |
Output is correct |
31 |
Correct |
10 ms |
5248 KB |
Output is correct |
32 |
Correct |
12 ms |
5376 KB |
Output is correct |
33 |
Correct |
10 ms |
5248 KB |
Output is correct |
34 |
Correct |
11 ms |
5248 KB |
Output is correct |
35 |
Correct |
12 ms |
5248 KB |
Output is correct |
36 |
Correct |
10 ms |
5248 KB |
Output is correct |
37 |
Correct |
9 ms |
5248 KB |
Output is correct |
38 |
Correct |
9 ms |
5248 KB |
Output is correct |
39 |
Correct |
9 ms |
5248 KB |
Output is correct |
40 |
Correct |
449 ms |
14644 KB |
Output is correct |
41 |
Correct |
462 ms |
15020 KB |
Output is correct |
42 |
Correct |
369 ms |
14044 KB |
Output is correct |
43 |
Correct |
600 ms |
14324 KB |
Output is correct |
44 |
Correct |
265 ms |
14840 KB |
Output is correct |
45 |
Correct |
680 ms |
13812 KB |
Output is correct |
46 |
Correct |
461 ms |
14156 KB |
Output is correct |
47 |
Correct |
116 ms |
14584 KB |
Output is correct |
48 |
Correct |
127 ms |
13624 KB |
Output is correct |
49 |
Correct |
112 ms |
12664 KB |
Output is correct |
50 |
Correct |
90 ms |
13688 KB |
Output is correct |
51 |
Correct |
122 ms |
12920 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
7 ms |
5120 KB |
Output is correct |
2 |
Correct |
6 ms |
4992 KB |
Output is correct |
3 |
Correct |
8 ms |
4992 KB |
Output is correct |
4 |
Correct |
9 ms |
5120 KB |
Output is correct |
5 |
Correct |
8 ms |
4992 KB |
Output is correct |
6 |
Correct |
7 ms |
4992 KB |
Output is correct |
7 |
Correct |
8 ms |
4988 KB |
Output is correct |
8 |
Correct |
9 ms |
4992 KB |
Output is correct |
9 |
Correct |
8 ms |
5120 KB |
Output is correct |
10 |
Correct |
6 ms |
4992 KB |
Output is correct |
11 |
Correct |
6 ms |
4992 KB |
Output is correct |
12 |
Correct |
6 ms |
4992 KB |
Output is correct |
13 |
Correct |
7 ms |
4992 KB |
Output is correct |
14 |
Correct |
7 ms |
5120 KB |
Output is correct |
15 |
Correct |
8 ms |
5120 KB |
Output is correct |
16 |
Correct |
7 ms |
5120 KB |
Output is correct |
17 |
Correct |
8 ms |
5120 KB |
Output is correct |
18 |
Correct |
8 ms |
5068 KB |
Output is correct |
19 |
Correct |
7 ms |
5120 KB |
Output is correct |
20 |
Correct |
8 ms |
5120 KB |
Output is correct |
21 |
Correct |
8 ms |
5120 KB |
Output is correct |
22 |
Correct |
5 ms |
5068 KB |
Output is correct |
23 |
Correct |
7 ms |
5120 KB |
Output is correct |
24 |
Correct |
6 ms |
5120 KB |
Output is correct |
25 |
Correct |
7 ms |
5120 KB |
Output is correct |
26 |
Correct |
7 ms |
5104 KB |
Output is correct |
27 |
Correct |
8 ms |
5120 KB |
Output is correct |
28 |
Correct |
10 ms |
5248 KB |
Output is correct |
29 |
Correct |
13 ms |
5296 KB |
Output is correct |
30 |
Correct |
12 ms |
5248 KB |
Output is correct |
31 |
Correct |
10 ms |
5248 KB |
Output is correct |
32 |
Correct |
12 ms |
5376 KB |
Output is correct |
33 |
Correct |
10 ms |
5248 KB |
Output is correct |
34 |
Correct |
11 ms |
5248 KB |
Output is correct |
35 |
Correct |
12 ms |
5248 KB |
Output is correct |
36 |
Correct |
10 ms |
5248 KB |
Output is correct |
37 |
Correct |
9 ms |
5248 KB |
Output is correct |
38 |
Correct |
9 ms |
5248 KB |
Output is correct |
39 |
Correct |
9 ms |
5248 KB |
Output is correct |
40 |
Correct |
449 ms |
14644 KB |
Output is correct |
41 |
Correct |
462 ms |
15020 KB |
Output is correct |
42 |
Correct |
369 ms |
14044 KB |
Output is correct |
43 |
Correct |
600 ms |
14324 KB |
Output is correct |
44 |
Correct |
265 ms |
14840 KB |
Output is correct |
45 |
Correct |
680 ms |
13812 KB |
Output is correct |
46 |
Correct |
461 ms |
14156 KB |
Output is correct |
47 |
Correct |
116 ms |
14584 KB |
Output is correct |
48 |
Correct |
127 ms |
13624 KB |
Output is correct |
49 |
Correct |
112 ms |
12664 KB |
Output is correct |
50 |
Correct |
90 ms |
13688 KB |
Output is correct |
51 |
Correct |
122 ms |
12920 KB |
Output is correct |
52 |
Correct |
871 ms |
15860 KB |
Output is correct |
53 |
Correct |
1155 ms |
15068 KB |
Output is correct |
54 |
Correct |
2087 ms |
15616 KB |
Output is correct |
55 |
Correct |
678 ms |
15608 KB |
Output is correct |
56 |
Correct |
1559 ms |
14884 KB |
Output is correct |
57 |
Correct |
1968 ms |
15168 KB |
Output is correct |
58 |
Correct |
983 ms |
15428 KB |
Output is correct |
59 |
Correct |
1322 ms |
13176 KB |
Output is correct |