QOJ.ac
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 |
---|---|---|---|---|---|---|---|---|---|
#23465 | #3249. 分组作业 | Qingyu | AC ✓ | 47ms | 9976kb | C++14 | 2.1kb | 2022-03-16 14:22:08 | 2022-04-30 03:13:07 |
Judging History
answer
#include<bits/stdc++.h>
#define int long long
using namespace std;
typedef long long ll;
const int INF=1ll<<45;
int n,m,k,s,t,vis[51000],dep[51000]; ll maxflow;
int edgenum=1,F[210000],V[210000],Next[210000],Head[51000],cur[51000];
void addedge(int u,int v,int f){
V[++edgenum]=v; F[edgenum]=f;
Next[edgenum]=Head[u];
Head[u]=edgenum;
}
void Add(int u,int v,int f){
// cerr<<"Edge: "<<u<<' '<<v<<' '<<f<<endl;
addedge(u,v,f);
addedge(v,u,0);
}
bool bfs(){
for (int i=0;i<=t;i++) vis[i]=false,dep[i]=INF;
dep[s]=0;
vis[s]=true;
queue<int> que;
que.push(s);
while (!que.empty()){
int u=que.front(); que.pop();
vis[u]=false;
for (int e=Head[u];e;e=Next[e]){
int v=V[e];
if (dep[v]>dep[u]+1&&F[e]){
dep[v]=dep[u]+1;
if (!vis[v]){
que.push(v);
vis[v]=true;
}
}
}
}
return dep[t]!=INF;
}
int dfs(int u,int flow){
if (u==t){
maxflow+=flow;
return flow;
}
int used=0;
for (int &e=cur[u];e;e=Next[e]){
int v=V[e];
if (F[e]&&dep[v]==dep[u]+1){
int minflow=dfs(v,min(flow-used,F[e]));
F[e]-=minflow; F[e^1]+=minflow; used+=minflow;
if (used==flow) break;
}
}
return used;
}
int dinic(){
while (bfs()){
for (int i=0;i<=t;i++) cur[i]=Head[i];
while (dfs(s,INF));
}
return maxflow;
}
signed main(){
ios::sync_with_stdio(false);
cin.tie(0); cout.tie(0);
cin>>n>>m; k=n+n; s=n+n+n; t=n+n+n+1;
int c,d,e,sum=0;
for (int i=0;i<k;i++){
cin>>c>>d>>e;
// c=rand(); d=rand(); e=rand();
if (c>d) Add(s,i,c-d),sum+=d;
else Add(i,t,d-c),sum+=c;
Add(i^1,i,e); Add(i,(i>>1)+k,INF);
}
int x,y,a,b;
for (int i=1;i<=m;i++){
cin>>x>>y>>a>>b; x--; y--;
// x=rand()%n; y=rand()%n;
// while (x==y||(x^y)==1) y=rand();
// a=rand(); b=rand();
Add((x>>1)+k,y,a); Add(x,(y>>1)+k,b);
}
cout<<sum+dinic()<<endl;
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 40ms
memory: 8348kb
input:
5000 10000 23060775 12 2 255978380 28 517 5 6624 26 151149 45131806 23849036 489 484971 24970 162846 1993316 188305 56311199 2003 211 1 50534913 517527 364913 882765 298 71 26 122914059 13 65459 18150033 20 607 8 380059068 3873712 228 9813 5449 6370 3309369 37410691 8 181 1 62340851 1705 4 107 8 209...
output:
22929674417
result:
ok single line: '22929674417'
Test #2:
score: 0
Accepted
time: 43ms
memory: 8864kb
input:
5000 10000 10055 16 122 4784525 16 23548777 75 3 412576 26487664 16119952 1092 3168 28 16059 33 4 13 2 1319671 7150391 17548 31559813 3201 6910 499901569 2 86633 8794940 2 4 2 85 1749 9908314 45526 10 631569 2347 18 141185 145333 23 27 117121 3825480 32645 5236 3 32022 1298 8 51750221 233 4 16102047...
output:
21306827991
result:
ok single line: '21306827991'
Test #3:
score: 0
Accepted
time: 40ms
memory: 8872kb
input:
5000 10000 48362 83079 12461784 16 4689773 2 763 3650 1128 2118 75447925 253189 47745409 622140 70841 302 162849091 1258 3399198 91 808632 16168406 10380 2 370511 10 3193109 261594 4 2 128 106331221 2 605 28343 601 19 1224480 37551173 49 78375152 493909 110536 1 836 28790 8 133 8 40 4 533035 879 391...
output:
22066314160
result:
ok single line: '22066314160'
Test #4:
score: 0
Accepted
time: 47ms
memory: 8736kb
input:
5000 10000 5564 607330 2584640 126520704 169669 3 231555 402303 114 2 128 58 290016 13 74249 8126414 279 974 1304 119651095 35466664 992290 3414 63 23564 1091 18168 418 125135735 3 29 1295683 424396930 1993 12647005 20 7 712237 1086773 500004515 6 355786 383393 486213 73 21141 29726 665 1 59959 2020...
output:
22438919820
result:
ok single line: '22438919820'
Test #5:
score: 0
Accepted
time: 40ms
memory: 9140kb
input:
5000 10000 23 1 217 41 249931 61567 3096055 3 7 24 12529 1 246322439 144141318 223606 39 906 2 22654307 3963932 3447414 7949665 51935780 344666 30 5058423 2825 148134 7532713 1140 242 5560395 4264 62940 8262918 182 7825 9865191 2992 138038614 24828018 33318812 11 1 4741355 241 533 3 4337359 741573 3...
output:
21645286114
result:
ok single line: '21645286114'
Test #6:
score: 0
Accepted
time: 45ms
memory: 9976kb
input:
5000 10000 53751618 18 124436 857 472 16 13506752 72 6929805 1313173 1 8 13 3 9428917 114702 15875684 375277 95772377 1 19 46 146 544774 2606 90182736 313 2 26253 330 92 17290550 229451029 53 3175 2 48316557 38441802 31 52027 40844521 966 2 455 40909310 6556 6662246 17592087 4914675 39 11812 4590536...
output:
24730200863
result:
ok single line: '24730200863'
Test #7:
score: 0
Accepted
time: 32ms
memory: 8312kb
input:
5000 10000 529152667 2028658 288974 46 2 1853274 212853 4442959 1 7439830 113977860 15476191 87430 6 972573 112375 4489 485 1273959 4049 4059 21 39694709 5 15511 256587916 2 164834468 4 95557537 9330 3 31231 1880144 197069 5753237 102274889 2187511 108044 1906 76869460 12 30311 27016904 6492296 1645...
output:
21376330041
result:
ok single line: '21376330041'
Test #8:
score: 0
Accepted
time: 0ms
memory: 9816kb
input:
3 2 1 1 999 1 1 999 1 999 999 1 999 999 999 1 999 999 1 999 5 1 999 1 1 3 100 1
output:
106
result:
ok single line: '106'