Submission #3967502
Source Code Expand
/* --- author: dxm --- */ #include<bits/stdc++.h> #pragma GCC optimize(2) 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 fst first #define snd second typedef long long ll; typedef double db; typedef long double ldb; typedef unsigned int uint; typedef unsigned long long ull; typedef pair<int,int> pii; typedef pair<long long,long long> pll; void qread(int &x){ int neg=1;x=0; char c=getchar(); while(c<'0'||c>'9'){if(c=='-')neg=-1;c=getchar();} while(c>='0'&&c<='9')x=10*x+c-'0',c=getchar(); x*=neg; } const int maxn=100005; int n,rt,m,cnt; int a[maxn],dp[maxn][2],dp2[maxn],d[maxn]; bool exi[maxn]; vector<int>edge[maxn]; char c[maxn]; void dfs1(int x,int p){ if(c[x]=='W')exi[x]=true; rep(i,edge[x].size()){ int y=edge[x][i]; if(y==p)continue; dfs1(y,x); exi[x]|=exi[y]; if(exi[y])d[x]++; } if(!exi[x])m--; } void dfs2(int x,int p){ dp[x][0]=-INF; dp[x][1]=dp2[x]=1+a[x]; bool leaf=true; rep(i,edge[x].size()){ int y=edge[x][i]; if(y==p||!exi[y])continue; leaf=false; dfs2(y,x); dp2[x]=max(dp2[x],dp2[y]); dp2[x]=max(dp2[x],dp[x][0]+dp[y][1]); dp2[x]=max(dp2[x],dp[x][1]+max(dp[y][0],dp[y][1])); dp[x][0]=max(dp[x][0],dp[y][0]+a[x]+1); dp[x][1]=max(dp[x][1],dp[y][1]+a[x]+1); } if(leaf)dp[x][0]=1+a[x],dp[x][1]=-INF; dp2[x]=max(dp2[x],max(dp[x][0],dp[x][1])); } int main(){ #ifdef FILE freopen("FILE.in","r",stdin); freopen("FILE.out","w",stdout); #endif scanf("%d",&n); m=n; REP(i,n-1){ int u,v; scanf("%d%d",&u,&v); edge[u].pb(v); edge[v].pb(u); } scanf("%s",c+1); REP(i,n)if(c[i]=='W')cnt++,rt=i; if(!cnt){ puts("0"); return 0; } if(cnt==1){ puts("1"); return 0; } dfs1(rt,0); int ans=(m-1)*2; REP(i,n)if(exi[i]){ a[i]=(c[i]=='W')^((d[i]+(i!=rt))&1); ans+=a[i]; if(!a[i])a[i]=-1; } dfs2(rt,0); printf("%d\n",ans-dp2[rt]); #ifdef TIME printf("Running Time = %d ms\n",int(clock()*1000.0/CLOCKS_PER_SEC)); #endif return 0; } /* Input: ----------------- Output: */
Submission Info
Submission Time | |
---|---|
Task | F - Monochrome Cat |
User | little_waxberry |
Language | C++14 (GCC 5.4.1) |
Score | 800 |
Code Size | 2212 Byte |
Status | AC |
Exec Time | 55 ms |
Memory | 15616 KB |
Compile Error
./Main.cpp: In function ‘int main()’: ./Main.cpp:73:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ ./Main.cpp:77:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&u,&v); ^ ./Main.cpp:81:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",c+1); ^
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 800 / 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 | 3 ms | 4224 KB |
0_001.txt | AC | 3 ms | 4224 KB |
0_002.txt | AC | 3 ms | 4224 KB |
0_003.txt | AC | 3 ms | 4224 KB |
1_003.txt | AC | 3 ms | 4224 KB |
1_004.txt | AC | 3 ms | 4224 KB |
1_005.txt | AC | 3 ms | 4224 KB |
1_006.txt | AC | 3 ms | 4224 KB |
1_007.txt | AC | 3 ms | 4224 KB |
1_008.txt | AC | 3 ms | 4224 KB |
1_009.txt | AC | 3 ms | 4224 KB |
1_010.txt | AC | 3 ms | 4224 KB |
1_011.txt | AC | 3 ms | 4224 KB |
1_012.txt | AC | 3 ms | 4224 KB |
1_013.txt | AC | 3 ms | 4224 KB |
1_014.txt | AC | 3 ms | 4224 KB |
1_015.txt | AC | 3 ms | 4224 KB |
1_016.txt | AC | 3 ms | 4224 KB |
1_017.txt | AC | 3 ms | 4224 KB |
1_018.txt | AC | 3 ms | 4224 KB |
1_019.txt | AC | 3 ms | 4224 KB |
1_020.txt | AC | 3 ms | 4224 KB |
1_021.txt | AC | 3 ms | 4224 KB |
1_022.txt | AC | 3 ms | 4224 KB |
1_023.txt | AC | 3 ms | 4224 KB |
1_024.txt | AC | 3 ms | 4224 KB |
1_025.txt | AC | 3 ms | 4224 KB |
1_026.txt | AC | 3 ms | 4224 KB |
1_027.txt | AC | 3 ms | 4224 KB |
1_028.txt | AC | 3 ms | 4224 KB |
1_029.txt | AC | 3 ms | 4224 KB |
1_030.txt | AC | 3 ms | 4224 KB |
1_031.txt | AC | 3 ms | 4224 KB |
1_032.txt | AC | 3 ms | 4224 KB |
1_033.txt | AC | 3 ms | 4224 KB |
1_034.txt | AC | 3 ms | 4224 KB |
1_035.txt | AC | 3 ms | 4224 KB |
1_036.txt | AC | 3 ms | 4224 KB |
1_037.txt | AC | 3 ms | 4224 KB |
1_038.txt | AC | 3 ms | 4224 KB |
1_039.txt | AC | 3 ms | 4224 KB |
1_040.txt | AC | 3 ms | 4224 KB |
1_041.txt | AC | 3 ms | 4224 KB |
1_042.txt | AC | 3 ms | 4224 KB |
1_043.txt | AC | 3 ms | 4224 KB |
1_044.txt | AC | 3 ms | 4224 KB |
1_045.txt | AC | 19 ms | 6912 KB |
1_046.txt | AC | 23 ms | 7680 KB |
1_047.txt | AC | 34 ms | 7424 KB |
1_048.txt | AC | 27 ms | 6656 KB |
1_049.txt | AC | 39 ms | 12288 KB |
1_050.txt | AC | 33 ms | 9856 KB |
1_051.txt | AC | 25 ms | 7288 KB |
1_052.txt | AC | 8 ms | 4992 KB |
1_053.txt | AC | 25 ms | 7288 KB |
1_054.txt | AC | 11 ms | 5504 KB |
1_055.txt | AC | 25 ms | 7288 KB |
1_056.txt | AC | 15 ms | 5884 KB |
1_057.txt | AC | 4 ms | 4352 KB |
1_058.txt | AC | 24 ms | 7552 KB |
1_059.txt | AC | 14 ms | 5376 KB |
1_060.txt | AC | 27 ms | 6656 KB |
1_061.txt | AC | 43 ms | 10368 KB |
1_062.txt | AC | 23 ms | 7424 KB |
1_063.txt | AC | 25 ms | 6528 KB |
1_064.txt | AC | 19 ms | 5888 KB |
1_065.txt | AC | 5 ms | 4480 KB |
1_066.txt | AC | 27 ms | 7036 KB |
1_067.txt | AC | 10 ms | 4992 KB |
1_068.txt | AC | 21 ms | 6144 KB |
1_069.txt | AC | 13 ms | 5248 KB |
1_070.txt | AC | 22 ms | 6016 KB |
1_071.txt | AC | 30 ms | 6912 KB |
1_072.txt | AC | 19 ms | 5888 KB |
1_073.txt | AC | 6 ms | 4608 KB |
1_074.txt | AC | 5 ms | 4480 KB |
1_075.txt | AC | 21 ms | 5760 KB |
1_076.txt | AC | 46 ms | 7808 KB |
1_077.txt | AC | 29 ms | 6912 KB |
1_078.txt | AC | 12 ms | 5248 KB |
1_079.txt | AC | 20 ms | 5760 KB |
1_080.txt | AC | 23 ms | 6016 KB |
1_081.txt | AC | 53 ms | 12032 KB |
1_082.txt | AC | 53 ms | 13312 KB |
1_083.txt | AC | 35 ms | 7424 KB |
1_084.txt | AC | 35 ms | 7424 KB |
1_085.txt | AC | 55 ms | 15616 KB |
1_086.txt | AC | 55 ms | 15232 KB |
1_087.txt | AC | 33 ms | 8312 KB |
1_088.txt | AC | 33 ms | 8312 KB |
1_089.txt | AC | 28 ms | 7800 KB |
1_090.txt | AC | 28 ms | 7800 KB |
1_091.txt | AC | 33 ms | 8312 KB |
1_092.txt | AC | 29 ms | 7800 KB |
1_093.txt | AC | 50 ms | 10112 KB |
1_094.txt | AC | 51 ms | 10368 KB |
1_095.txt | AC | 36 ms | 7424 KB |
1_096.txt | AC | 35 ms | 7424 KB |
1_097.txt | AC | 51 ms | 10112 KB |
1_098.txt | AC | 50 ms | 10112 KB |
1_099.txt | AC | 41 ms | 8060 KB |
1_100.txt | AC | 41 ms | 8060 KB |
1_101.txt | AC | 33 ms | 7676 KB |
1_102.txt | AC | 33 ms | 7676 KB |
1_103.txt | AC | 42 ms | 8060 KB |
1_104.txt | AC | 39 ms | 8060 KB |
1_105.txt | AC | 47 ms | 7936 KB |
1_106.txt | AC | 47 ms | 7936 KB |
1_107.txt | AC | 36 ms | 7552 KB |
1_108.txt | AC | 36 ms | 7552 KB |
1_109.txt | AC | 47 ms | 7936 KB |
1_110.txt | AC | 46 ms | 7936 KB |
1_111.txt | AC | 47 ms | 7936 KB |
1_112.txt | AC | 49 ms | 7936 KB |
1_113.txt | AC | 36 ms | 7552 KB |
1_114.txt | AC | 36 ms | 7552 KB |
1_115.txt | AC | 47 ms | 7936 KB |
1_116.txt | AC | 46 ms | 7936 KB |