Submission #1692508
Source Code Expand
#include<bits/stdc++.h> #define N 200005 using namespace std; int n,m,ly,s[N],b[N],vis[N],sum,tar,flag,a1[N];long long Ans; int to[N*2],fst[N],nxt[N*2],hz[N*2],l=1; void biu() { puts("-1"); exit(0); } void link(int x,int y) { to[++l]=y;nxt[l]=fst[x];fst[x]=l; to[++l]=x;nxt[l]=fst[y];fst[y]=l; } struct T { int x,y; }a[N]; T operator+(T a,T b) { return (T){a.x+b.x,a.y+b.y}; } void Dfs(int x,int y,int f) { a[x].y=y;b[x]=y^1; vis[x]=1;sum+=y;tar+=y^1; for (int i=fst[x];i;i=nxt[i]) if (to[i]!=f) { if (!vis[to[i]]) Dfs(to[i],y^1,x); else flag=i; } } void Get(int x,int y,int f) { a[x].y=y+a1[x];b[x]=y^1; sum+=a[x].y;tar+=b[x]; for (int i=fst[x];i;i=nxt[i]) if (to[i]!=f&&!hz[i]) { Get(to[i],y^1,x); a[x]=a[x]+a[to[i]]; b[x]=b[x]+b[to[i]]; } } int main() { scanf("%d%d",&n,&m); if (n&1) biu(); for (int i=1;i<=m;i++) { int x,y; scanf("%d%d",&x,&y); link(x,y); } Dfs(1,1,0); if (flag) { int u=to[flag],v=to[flag^1]; // cout<<u<<'-'<<v<<endl; // cout<<tar<<' '<<sum<<endl; if (a[u].y==a[v].y) { //puts("1%"); if ((tar-sum)%2) biu(); if (a[u].y) a1[u]+=(tar-sum)/2,a1[v]+=(tar-sum)/2; else a1[u]+=(tar-sum)/2,a1[v]+=(tar-sum)/2; Ans+=abs((tar-sum)/2); // cout<<Ans<<endl; } else { //Ans=Get+x if (sum!=tar) biu(); a[u].x++;a[v].x--; s[++ly]=0; } hz[flag]=hz[flag^1]=1; } else if (sum!=tar) biu(); sum=tar=0; Get(1,1,0); //cout<<sum<<' '<<tar<<endl; for (int i=2;i<=n;i++) { //cout<<a[i].x<<' '<<a[i].y<<endl; a[i].y-=b[i]; if (a[i].x) s[++ly]=a[i].x==1?a[i].y:-a[i].y; else Ans+=abs(a[i].y); } sort(s+1,s+ly+1); for (int i=1;i<=ly;i++) Ans+=abs(s[i]-s[(ly+1)/2]); printf("%lld\n",Ans); }
Submission Info
Submission Time | |
---|---|
Task | F - Namori |
User | miaom |
Language | C++14 (GCC 5.4.1) |
Score | 2200 |
Code Size | 1805 Byte |
Status | AC |
Exec Time | 37 ms |
Memory | 14208 KB |
Compile Error
./Main.cpp: In function ‘int main()’: ./Main.cpp:50:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ ./Main.cpp:55:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^
Judge Result
Set Name | Sample | Subtask1 | All | ||||||
---|---|---|---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 1500 / 1500 | 700 / 700 | ||||||
Status |
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Set Name | Test Cases |
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Sample | 0_00.txt, 0_01.txt, 0_02.txt, 0_03.txt |
Subtask1 | 0_00.txt, 0_01.txt, 1_00.txt, 1_01.txt, 1_02.txt, 1_03.txt, 1_04.txt, 1_05.txt, 1_06.txt, 1_07.txt, 1_08.txt, 1_09.txt, 1_10.txt, 1_11.txt, 1_12.txt, 1_13.txt, 1_14.txt, 1_15.txt, 1_16.txt, 1_17.txt |
All | 0_00.txt, 0_01.txt, 0_02.txt, 0_03.txt, 1_00.txt, 1_01.txt, 1_02.txt, 1_03.txt, 1_04.txt, 1_05.txt, 1_06.txt, 1_07.txt, 1_08.txt, 1_09.txt, 1_10.txt, 1_11.txt, 1_12.txt, 1_13.txt, 1_14.txt, 1_15.txt, 1_16.txt, 1_17.txt, 2_00.txt, 2_01.txt, 2_02.txt, 2_03.txt, 2_04.txt, 2_05.txt, 2_06.txt, 2_07.txt, 2_08.txt, 2_09.txt, 2_10.txt, 2_11.txt, 2_12.txt, 2_13.txt, 2_14.txt, 2_15.txt, 2_16.txt, 2_17.txt, 2_18.txt, 2_19.txt, 2_20.txt, 2_21.txt, 2_22.txt, 2_23.txt, 2_24.txt, 2_25.txt, 2_26.txt, 2_27.txt, 2_28.txt, 2_29.txt, 2_30.txt, 2_31.txt, 2_32.txt, 2_33.txt, 2_34.txt, 2_35.txt, 2_36.txt, 2_37.txt, 2_38.txt, 2_39.txt, 2_40.txt, 2_41.txt, 2_42.txt, 2_43.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
0_00.txt | AC | 4 ms | 6400 KB |
0_01.txt | AC | 1 ms | 256 KB |
0_02.txt | AC | 3 ms | 6400 KB |
0_03.txt | AC | 3 ms | 6528 KB |
1_00.txt | AC | 3 ms | 6400 KB |
1_01.txt | AC | 37 ms | 13568 KB |
1_02.txt | AC | 30 ms | 9344 KB |
1_03.txt | AC | 25 ms | 7552 KB |
1_04.txt | AC | 31 ms | 10368 KB |
1_05.txt | AC | 33 ms | 10112 KB |
1_06.txt | AC | 33 ms | 10240 KB |
1_07.txt | AC | 30 ms | 9344 KB |
1_08.txt | AC | 32 ms | 10624 KB |
1_09.txt | AC | 27 ms | 7552 KB |
1_10.txt | AC | 28 ms | 7552 KB |
1_11.txt | AC | 28 ms | 7552 KB |
1_12.txt | AC | 28 ms | 7552 KB |
1_13.txt | AC | 1 ms | 256 KB |
1_14.txt | AC | 24 ms | 7680 KB |
1_15.txt | AC | 29 ms | 7552 KB |
1_16.txt | AC | 2 ms | 256 KB |
1_17.txt | AC | 30 ms | 7552 KB |
2_00.txt | AC | 3 ms | 6400 KB |
2_01.txt | AC | 37 ms | 14208 KB |
2_02.txt | AC | 32 ms | 10880 KB |
2_03.txt | AC | 25 ms | 7552 KB |
2_04.txt | AC | 34 ms | 10880 KB |
2_05.txt | AC | 35 ms | 10880 KB |
2_06.txt | AC | 34 ms | 10880 KB |
2_07.txt | AC | 35 ms | 10880 KB |
2_08.txt | AC | 35 ms | 10880 KB |
2_09.txt | AC | 27 ms | 7552 KB |
2_10.txt | AC | 28 ms | 7552 KB |
2_11.txt | AC | 29 ms | 7552 KB |
2_12.txt | AC | 29 ms | 7552 KB |
2_13.txt | AC | 1 ms | 256 KB |
2_14.txt | AC | 25 ms | 7808 KB |
2_15.txt | AC | 29 ms | 7680 KB |
2_16.txt | AC | 1 ms | 256 KB |
2_17.txt | AC | 28 ms | 7552 KB |
2_18.txt | AC | 1 ms | 256 KB |
2_19.txt | AC | 30 ms | 10752 KB |
2_20.txt | AC | 25 ms | 7552 KB |
2_21.txt | AC | 37 ms | 14208 KB |
2_22.txt | AC | 30 ms | 10752 KB |
2_23.txt | AC | 32 ms | 10752 KB |
2_24.txt | AC | 32 ms | 10752 KB |
2_25.txt | AC | 32 ms | 10752 KB |
2_26.txt | AC | 31 ms | 10752 KB |
2_27.txt | AC | 26 ms | 7552 KB |
2_28.txt | AC | 28 ms | 7552 KB |
2_29.txt | AC | 28 ms | 7552 KB |
2_30.txt | AC | 29 ms | 7552 KB |
2_31.txt | AC | 1 ms | 256 KB |
2_32.txt | AC | 32 ms | 7808 KB |
2_33.txt | AC | 28 ms | 7680 KB |
2_34.txt | AC | 1 ms | 256 KB |
2_35.txt | AC | 29 ms | 7552 KB |
2_36.txt | AC | 25 ms | 7552 KB |
2_37.txt | AC | 25 ms | 7552 KB |
2_38.txt | AC | 24 ms | 7552 KB |
2_39.txt | AC | 25 ms | 7552 KB |
2_40.txt | AC | 26 ms | 7552 KB |
2_41.txt | AC | 24 ms | 7552 KB |
2_42.txt | AC | 25 ms | 7552 KB |
2_43.txt | AC | 24 ms | 7552 KB |