Submission #2513100
Source Code Expand
/* --- author: dxm --- */ #include<bits/stdc++.h> using namespace std; #define INF 1e9 #define Inf 1e18 #define rep(i,n) for(int (i)=0;(i)<n;i++) #define REP(i,n) for(int (i)=1;(i)<=n;i++) #define mp make_pair #define pb push_back #define pii pair<int,int> #define fst first #define snd second typedef long long ll; inline void Fail(){printf("0");exit(0);} inline void upd(ll &a,ll b){if(b<a)a=b;} const int maxn=100005; int n,col[maxn],son[maxn]; vector<int>edge[maxn]; ll dp[maxn][2][2][2],ans; ll pre[maxn],suf[maxn]; char c[maxn]; void dfs(int x,int p,int sign){ int sz=0; ll sum=0; rep(i,edge[x].size()){ int y=edge[x][i]; if(y==p)continue; dfs(y,x,sign&col[x]); if(dp[y][1][0][1]!=0)sum+=dp[y][0][0][1]+2,son[sz]=y,sz++; } if(!sz){ rep(i,2)rep(j,2)rep(k,2){ dp[x][i][j][k]=(col[x]+i)%2; } goto end; } // cout<<x<<" "<<sz<<endl; pre[0]=sum-dp[son[0]][0][0][1]-2+dp[son[0]][1][1][1]+1; REP(i,sz-1)pre[i]=min(pre[i-1],sum-dp[son[i]][0][0][1]-2+dp[son[i]][1][1][1]+1); suf[sz-1]=sum-dp[son[sz-1]][0][0][1]-2+dp[son[sz-1]][1][1][1]+1; for(int i=sz-2;i>=0;i--)suf[i]=min(suf[i+1],sum-dp[son[i]][0][0][1]-2+dp[son[i]][1][1][1]+1); rep(i,2){ dp[x][i][0][0]=Inf; rep(j,sz)upd(dp[x][i][0][0],sum-dp[son[j]][0][0][1]-2+dp[son[j]][0][0][0]+1); dp[x][i][0][0]+=(sz+col[x]+1+i)%2; dp[x][i][0][1]=sum+(sz+col[x]+i)%2; dp[x][i][1][0]=Inf; if(sz==1){ if(i==col[x])dp[x][i][1][0]=dp[son[0]][1][1][0]; else dp[x][i][1][0]=dp[son[0]][0][1][0]+2+(col[x]+sz+1+i)%2; } else{ rep(j,sz){ ll cur=min((!j?Inf:pre[j-1]),(j==sz-1?Inf:suf[j+1]))-dp[son[j]][0][0][1]-2; upd(dp[x][i][1][0],cur+dp[son[j]][0][0][0]+1+(sz+col[x]+1+i)%2); upd(dp[x][i][1][0],sum-dp[son[j]][0][0][1]-2+dp[son[j]][0][1][0]+2+(sz+col[x]+i)%2); } } dp[x][i][1][1]=Inf; rep(j,sz)upd(dp[x][i][1][1],sum-dp[son[j]][0][0][1]-2+dp[son[j]][1][1][1]+1); dp[x][i][1][1]+=(sz+col[x]+i)%2; } end: rep(i,2)rep(j,2){ upd(dp[x][i][j][1],dp[x][i^1][j][1]+1); } if(sign){ rep(i,2)rep(j,2)upd(ans,dp[x][1][i][j]); } // cout<<x<<" "<<dp[x][0][0][0]<<" "<<dp[x][0][0][1]<<" "<<dp[x][0][1][0]<<" "<<dp[x][0][1][1]<<endl; // cout<<x<<" "<<dp[x][1][0][0]<<" "<<dp[x][1][0][1]<<" "<<dp[x][1][1][0]<<" "<<dp[x][1][1][1]<<endl; } int main(){ // freopen("F.in","r",stdin); // freopen("F.out","w",stdout); scanf("%d",&n); rep(i,n-1){ int u,v; scanf("%d%d",&u,&v); u--;v--; edge[u].pb(v); edge[v].pb(u); } scanf("%s",c); rep(i,n)col[i]=c[i]=='W'?0:1; ans=Inf; dfs(0,-1,1); printf("%lld\n",ans); return 0; } /* Input: ----------------- Output: */
Submission Info
Submission Time | |
---|---|
Task | F - Monochrome Cat |
User | little_waxberry |
Language | C++ (GCC 5.4.1) |
Score | 0 |
Code Size | 2678 Byte |
Status | WA |
Exec Time | 55 ms |
Memory | 23296 KB |
Compile Error
./Main.cpp: In function ‘int main()’: ./Main.cpp:80:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ ./Main.cpp:83:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&u,&v); ^ ./Main.cpp:88:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",c); ^
Judge Result
Set Name | Sample | All | ||||||
---|---|---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 0 / 800 | ||||||
Status |
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Set Name | Test Cases |
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Sample | 0_000.txt, 0_001.txt, 0_002.txt, 0_003.txt |
All | 0_000.txt, 0_001.txt, 0_002.txt, 0_003.txt, 1_003.txt, 1_004.txt, 1_005.txt, 1_006.txt, 1_007.txt, 1_008.txt, 1_009.txt, 1_010.txt, 1_011.txt, 1_012.txt, 1_013.txt, 1_014.txt, 1_015.txt, 1_016.txt, 1_017.txt, 1_018.txt, 1_019.txt, 1_020.txt, 1_021.txt, 1_022.txt, 1_023.txt, 1_024.txt, 1_025.txt, 1_026.txt, 1_027.txt, 1_028.txt, 1_029.txt, 1_030.txt, 1_031.txt, 1_032.txt, 1_033.txt, 1_034.txt, 1_035.txt, 1_036.txt, 1_037.txt, 1_038.txt, 1_039.txt, 1_040.txt, 1_041.txt, 1_042.txt, 1_043.txt, 1_044.txt, 1_045.txt, 1_046.txt, 1_047.txt, 1_048.txt, 1_049.txt, 1_050.txt, 1_051.txt, 1_052.txt, 1_053.txt, 1_054.txt, 1_055.txt, 1_056.txt, 1_057.txt, 1_058.txt, 1_059.txt, 1_060.txt, 1_061.txt, 1_062.txt, 1_063.txt, 1_064.txt, 1_065.txt, 1_066.txt, 1_067.txt, 1_068.txt, 1_069.txt, 1_070.txt, 1_071.txt, 1_072.txt, 1_073.txt, 1_074.txt, 1_075.txt, 1_076.txt, 1_077.txt, 1_078.txt, 1_079.txt, 1_080.txt, 1_081.txt, 1_082.txt, 1_083.txt, 1_084.txt, 1_085.txt, 1_086.txt, 1_087.txt, 1_088.txt, 1_089.txt, 1_090.txt, 1_091.txt, 1_092.txt, 1_093.txt, 1_094.txt, 1_095.txt, 1_096.txt, 1_097.txt, 1_098.txt, 1_099.txt, 1_100.txt, 1_101.txt, 1_102.txt, 1_103.txt, 1_104.txt, 1_105.txt, 1_106.txt, 1_107.txt, 1_108.txt, 1_109.txt, 1_110.txt, 1_111.txt, 1_112.txt, 1_113.txt, 1_114.txt, 1_115.txt, 1_116.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
0_000.txt | AC | 2 ms | 4352 KB |
0_001.txt | AC | 2 ms | 4352 KB |
0_002.txt | AC | 2 ms | 4352 KB |
0_003.txt | AC | 2 ms | 4352 KB |
1_003.txt | AC | 2 ms | 4352 KB |
1_004.txt | AC | 2 ms | 4352 KB |
1_005.txt | AC | 2 ms | 4352 KB |
1_006.txt | AC | 2 ms | 4352 KB |
1_007.txt | AC | 2 ms | 4352 KB |
1_008.txt | AC | 2 ms | 4352 KB |
1_009.txt | AC | 2 ms | 4352 KB |
1_010.txt | WA | 2 ms | 4352 KB |
1_011.txt | AC | 2 ms | 4352 KB |
1_012.txt | AC | 2 ms | 4352 KB |
1_013.txt | WA | 2 ms | 4352 KB |
1_014.txt | AC | 2 ms | 4352 KB |
1_015.txt | AC | 2 ms | 4352 KB |
1_016.txt | AC | 2 ms | 4352 KB |
1_017.txt | AC | 2 ms | 4352 KB |
1_018.txt | WA | 2 ms | 4352 KB |
1_019.txt | AC | 2 ms | 4352 KB |
1_020.txt | AC | 2 ms | 4352 KB |
1_021.txt | AC | 2 ms | 4352 KB |
1_022.txt | WA | 2 ms | 4352 KB |
1_023.txt | AC | 2 ms | 4352 KB |
1_024.txt | WA | 2 ms | 4352 KB |
1_025.txt | AC | 2 ms | 4352 KB |
1_026.txt | AC | 2 ms | 4352 KB |
1_027.txt | AC | 2 ms | 4352 KB |
1_028.txt | WA | 2 ms | 4352 KB |
1_029.txt | AC | 2 ms | 4352 KB |
1_030.txt | WA | 2 ms | 4352 KB |
1_031.txt | AC | 2 ms | 4352 KB |
1_032.txt | AC | 2 ms | 4352 KB |
1_033.txt | AC | 2 ms | 4352 KB |
1_034.txt | AC | 2 ms | 4352 KB |
1_035.txt | AC | 2 ms | 4352 KB |
1_036.txt | WA | 2 ms | 4352 KB |
1_037.txt | AC | 2 ms | 4352 KB |
1_038.txt | WA | 2 ms | 4352 KB |
1_039.txt | WA | 2 ms | 4352 KB |
1_040.txt | AC | 2 ms | 4352 KB |
1_041.txt | AC | 2 ms | 4352 KB |
1_042.txt | AC | 2 ms | 4352 KB |
1_043.txt | AC | 2 ms | 4352 KB |
1_044.txt | AC | 2 ms | 4352 KB |
1_045.txt | WA | 18 ms | 11008 KB |
1_046.txt | WA | 22 ms | 14976 KB |
1_047.txt | AC | 45 ms | 19840 KB |
1_048.txt | WA | 35 ms | 18688 KB |
1_049.txt | WA | 35 ms | 16640 KB |
1_050.txt | WA | 31 ms | 16256 KB |
1_051.txt | AC | 27 ms | 13304 KB |
1_052.txt | AC | 8 ms | 7680 KB |
1_053.txt | AC | 27 ms | 12280 KB |
1_054.txt | WA | 12 ms | 8188 KB |
1_055.txt | AC | 27 ms | 13304 KB |
1_056.txt | AC | 16 ms | 10748 KB |
1_057.txt | WA | 3 ms | 4608 KB |
1_058.txt | WA | 21 ms | 12032 KB |
1_059.txt | AC | 17 ms | 9088 KB |
1_060.txt | WA | 32 ms | 13952 KB |
1_061.txt | WA | 38 ms | 14848 KB |
1_062.txt | WA | 21 ms | 12544 KB |
1_063.txt | WA | 26 ms | 11776 KB |
1_064.txt | WA | 18 ms | 10752 KB |
1_065.txt | AC | 4 ms | 4992 KB |
1_066.txt | WA | 30 ms | 11900 KB |
1_067.txt | WA | 9 ms | 7680 KB |
1_068.txt | WA | 21 ms | 11008 KB |
1_069.txt | WA | 13 ms | 7808 KB |
1_070.txt | WA | 21 ms | 10624 KB |
1_071.txt | AC | 35 ms | 11904 KB |
1_072.txt | WA | 22 ms | 10752 KB |
1_073.txt | WA | 6 ms | 7168 KB |
1_074.txt | WA | 4 ms | 4992 KB |
1_075.txt | WA | 20 ms | 10496 KB |
1_076.txt | WA | 41 ms | 12416 KB |
1_077.txt | AC | 33 ms | 11776 KB |
1_078.txt | WA | 13 ms | 7936 KB |
1_079.txt | WA | 20 ms | 10368 KB |
1_080.txt | WA | 21 ms | 10624 KB |
1_081.txt | WA | 47 ms | 18432 KB |
1_082.txt | WA | 48 ms | 18816 KB |
1_083.txt | AC | 48 ms | 23296 KB |
1_084.txt | WA | 46 ms | 18944 KB |
1_085.txt | WA | 49 ms | 21760 KB |
1_086.txt | WA | 55 ms | 22144 KB |
1_087.txt | AC | 37 ms | 14840 KB |
1_088.txt | AC | 34 ms | 13816 KB |
1_089.txt | AC | 32 ms | 12792 KB |
1_090.txt | WA | 37 ms | 12792 KB |
1_091.txt | AC | 36 ms | 14840 KB |
1_092.txt | AC | 32 ms | 12792 KB |
1_093.txt | WA | 46 ms | 15744 KB |
1_094.txt | WA | 47 ms | 17792 KB |
1_095.txt | AC | 43 ms | 16384 KB |
1_096.txt | WA | 44 ms | 17408 KB |
1_097.txt | WA | 45 ms | 16640 KB |
1_098.txt | WA | 46 ms | 17152 KB |
1_099.txt | WA | 40 ms | 13692 KB |
1_100.txt | WA | 39 ms | 13308 KB |
1_101.txt | AC | 37 ms | 12668 KB |
1_102.txt | WA | 37 ms | 12668 KB |
1_103.txt | WA | 40 ms | 13692 KB |
1_104.txt | AC | 38 ms | 13052 KB |
1_105.txt | WA | 43 ms | 12544 KB |
1_106.txt | WA | 42 ms | 12544 KB |
1_107.txt | AC | 42 ms | 12544 KB |
1_108.txt | WA | 42 ms | 12544 KB |
1_109.txt | AC | 46 ms | 12544 KB |
1_110.txt | WA | 42 ms | 12544 KB |
1_111.txt | WA | 50 ms | 12544 KB |
1_112.txt | WA | 43 ms | 12544 KB |
1_113.txt | AC | 41 ms | 12544 KB |
1_114.txt | WA | 42 ms | 12544 KB |
1_115.txt | AC | 42 ms | 12544 KB |
1_116.txt | WA | 42 ms | 12544 KB |