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QOJ
| ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
|---|---|---|---|---|---|---|---|---|---|
| #58253 | #1880. Nikanor Loves Games | tricyzhkx | WA | 4ms | 16264kb | C++14 | 1.2kb | 2022-10-25 11:36:18 | 2022-10-25 11:36:19 |
Judging History
answer
# include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int a[200010],b[200010],w[200010],xx[400010];
ll f[400010];
struct Point
{
ll x,y;
Point(ll _x=0,ll _y=0):x(_x),y(_y){}
Point operator-(const Point &a)const{return Point(x-a.x,y-a.y);}
ll operator*(const Point &a)const{return x*a.y-y*a.x;}
ll calc(ll k){return y-k*x;}
}c[400010],stk[400010];
int main()
{
int n,len=0,tp=0;
cin>>n;
for(int i=1;i<=n;i++) scanf("%d%d%d",&a[i],&b[i],&w[i]),xx[++len]=a[i],xx[++len]=b[i];
xx[++len]=1;
sort(xx+1,xx+len+1);
len=unique(xx+1,xx+len+1)-xx-1;
auto get=[&](int x){return lower_bound(xx+1,xx+len+1,x)-xx;};
for(int i=1;i<=n;i++) a[i]=get(a[i]),b[i]=get(b[i]);
for(int i=1;i<=n;i++) f[1]-=w[i],f[a[i]]+=w[i],f[b[i]]+=w[i];
for(int i=1;i<=len;i++) f[i]+=f[i-1],c[i]=Point(xx[i],f[i]);
for(int i=1;i<=len;i++)
{
while(tp>1 && (c[i]-stk[tp])*(stk[tp]-stk[tp-1])<=0) tp--;
stk[++tp]=c[i];
}
int cur=tp;
ll ans=-1e18;
for(int i=1;i<=len;i++)
{
while(cur>1 && stk[cur].calc(2*xx[i])<stk[cur-1].calc(2*xx[i])) cur--;
ans=max(ans,f[i]+stk[cur].calc(2*xx[i]));
}
if(ans&1) cout<<(ans-1)/2<<".5"<<endl;
else cout<<ans/2<<endl;
return 0;
}
詳細信息
Test #1:
score: 100
Accepted
time: 2ms
memory: 16164kb
input:
2 1 4 15 3 5 10
output:
2.5
result:
ok found '2.5000000', expected '2.5000000', error '0.0000000'
Test #2:
score: 0
Accepted
time: 2ms
memory: 16164kb
input:
1 2 2 8
output:
4
result:
ok found '4.0000000', expected '4.0000000', error '0.0000000'
Test #3:
score: 0
Accepted
time: 1ms
memory: 16148kb
input:
3 94 68 49 51 2 63 26 85 20
output:
-73
result:
ok found '-73.0000000', expected '-73.0000000', error '-0.0000000'
Test #4:
score: 0
Accepted
time: 4ms
memory: 16152kb
input:
2 14 68 12 28 2 46
output:
-16
result:
ok found '-16.0000000', expected '-16.0000000', error '-0.0000000'
Test #5:
score: 0
Accepted
time: 4ms
memory: 16224kb
input:
5 6 6 8 6 1 11 6 1 13 6 1 5 5 1 2
output:
9.5
result:
ok found '9.5000000', expected '9.5000000', error '0.0000000'
Test #6:
score: 0
Accepted
time: 2ms
memory: 16032kb
input:
5 5 4 2 4 1 10 3 1 3 2 1 3 5 1 5
output:
5.5
result:
ok found '5.5000000', expected '5.5000000', error '0.0000000'
Test #7:
score: 0
Accepted
time: 4ms
memory: 16192kb
input:
5 1 5 2 4 2 7 2 2 2 2 5 14 1 4 2
output:
4.5
result:
ok found '4.5000000', expected '4.5000000', error '0.0000000'
Test #8:
score: 0
Accepted
time: 4ms
memory: 16228kb
input:
5 4 1 9 1 5 13 3 6 10 6 5 8 3 5 5
output:
9
result:
ok found '9.0000000', expected '9.0000000', error '0.0000000'
Test #9:
score: 0
Accepted
time: 4ms
memory: 16232kb
input:
5 3 7 9 5 7 12 4 6 13 3 6 6 2 1 2
output:
-6
result:
ok found '-6.0000000', expected '-6.0000000', error '-0.0000000'
Test #10:
score: 0
Accepted
time: 4ms
memory: 16228kb
input:
10 8 10 26 11 2 28 13 4 13 11 1 26 6 15 23 12 8 7 9 8 11 11 10 17 8 11 18 3 10 27
output:
32
result:
ok found '32.0000000', expected '32.0000000', error '0.0000000'
Test #11:
score: 0
Accepted
time: 4ms
memory: 16240kb
input:
10 6 5 10 10 15 21 7 2 30 14 6 12 1 11 6 1 13 19 8 13 29 9 4 14 1 4 29 4 12 17
output:
12
result:
ok found '12.0000000', expected '12.0000000', error '0.0000000'
Test #12:
score: 0
Accepted
time: 2ms
memory: 16228kb
input:
10 5 15 15 3 14 20 11 14 26 15 12 22 5 15 11 12 10 10 1 12 18 7 7 14 3 5 10 12 9 23
output:
-6
result:
ok found '-6.0000000', expected '-6.0000000', error '-0.0000000'
Test #13:
score: 0
Accepted
time: 2ms
memory: 16264kb
input:
10 3 9 29 9 5 27 14 13 21 3 15 15 14 11 24 9 14 22 9 3 20 12 15 27 5 13 21 13 11 14
output:
-5
result:
ok found '-5.0000000', expected '-5.0000000', error '-0.0000000'
Test #14:
score: 0
Accepted
time: 2ms
memory: 16176kb
input:
10 3 13 11 3 5 20 9 10 1 5 5 25 10 1 29 6 10 26 1 15 1 10 10 18 6 6 2 14 6 20
output:
21
result:
ok found '21.0000000', expected '21.0000000', error '0.0000000'
Test #15:
score: 0
Accepted
time: 4ms
memory: 16260kb
input:
100 68 91 90 56 38 71 69 57 87 80 62 21 31 80 25 36 48 40 71 66 49 15 57 78 96 69 43 25 73 57 86 13 5 23 98 18 83 94 9 8 22 43 46 3 50 81 11 26 14 35 39 49 68 73 41 11 25 35 47 48 5 96 15 15 56 60 42 1 40 11 4 25 57 72 9 43 3 90 16 45 36 83 50 17 55 40 39 72 37 6 70 84 24 12 36 95 43 15 13 82 28 68 ...
output:
35.5
result:
ok found '35.5000000', expected '35.5000000', error '0.0000000'
Test #16:
score: 0
Accepted
time: 2ms
memory: 16240kb
input:
100 92 35 39 34 92 36 45 45 46 66 5 64 22 21 48 53 70 91 93 19 98 97 67 54 57 77 64 90 81 23 12 83 92 59 3 26 13 65 47 19 23 58 27 58 38 60 18 70 32 94 53 100 66 97 33 53 16 56 2 64 8 9 55 93 92 22 27 25 39 45 49 24 76 80 89 73 55 77 69 53 90 39 77 40 86 12 11 23 87 25 8 96 31 73 45 98 52 62 55 98 9...
output:
-100
result:
ok found '-100.0000000', expected '-100.0000000', error '-0.0000000'
Test #17:
score: 0
Accepted
time: 2ms
memory: 16224kb
input:
100 20 84 93 15 45 13 28 33 2 49 41 12 12 50 59 62 89 49 11 60 42 74 84 33 14 94 85 51 2 89 26 66 87 92 12 26 47 32 84 34 16 80 20 16 27 48 34 14 54 61 66 52 47 21 41 87 3 81 45 68 24 18 94 71 23 87 12 49 34 79 6 6 91 92 56 3 15 64 22 69 41 91 3 60 21 76 79 65 41 48 46 9 35 34 54 92 68 10 1 22 82 17...
output:
25.5
result:
ok found '25.5000000', expected '25.5000000', error '0.0000000'
Test #18:
score: 0
Accepted
time: 2ms
memory: 16144kb
input:
100 44 28 47 89 7 89 7 21 57 27 92 56 14 96 86 79 11 7 29 4 95 56 93 16 71 2 6 100 14 59 53 32 82 24 20 35 73 7 22 44 9 91 5 70 24 31 41 50 72 19 80 100 44 46 33 26 94 2 4 72 27 35 29 49 54 44 92 73 33 13 55 92 6 3 31 37 76 47 75 77 87 44 33 80 63 48 51 12 90 66 83 17 46 99 59 78 76 61 35 39 52 91 9...
output:
-57
result:
ok found '-57.0000000', expected '-57.0000000', error '-0.0000000'
Test #19:
score: -100
Wrong Answer
time: 0ms
memory: 16188kb
input:
100 68 73 96 63 60 58 86 13 29 13 32 95 4 25 97 96 30 61 55 57 43 34 98 95 32 14 27 65 26 38 79 10 69 56 33 35 98 82 59 55 9 5 82 25 12 19 53 94 90 82 6 48 29 70 29 60 76 23 59 89 38 44 64 31 81 10 77 96 24 51 99 79 25 19 11 68 32 34 28 89 38 100 64 4 94 16 19 58 40 89 17 34 57 64 69 80 92 12 81 63 ...
output:
-82.5
result:
wrong answer 1st numbers differ - expected: '-81.5000000', found: '-82.5000000', error = '0.0122699'