結果
問題 | No.994 ばらばらコイン |
ユーザー |
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提出日時 | 2020-02-21 21:23:19 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,203 bytes |
コンパイル時間 | 2,617 ms |
コンパイル使用メモリ | 215,024 KB |
最終ジャッジ日時 | 2025-01-09 01:23:50 |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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ファイルパターン | 結果 |
---|---|
other | AC * 7 WA * 16 |
ソースコード
#pragma GCC optimize ("Ofast")#include<bits/stdc++.h>using namespace std;void *wmem;char memarr[96000000];template<class T> inline void walloc1d(T **arr, int x, void **mem = &wmem){static int skip[16] = {0, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1};(*mem) = (void*)( ((char*)(*mem)) + skip[((unsigned long long)(*mem)) & 15] );(*arr)=(T*)(*mem);(*mem)=((*arr)+x);}template<class T1> void sortA_L(int N, T1 a[], void *mem = wmem){sort(a, a+N);}inline void rd(int &x){int k;int m=0;x=0;for(;;){k = getchar_unlocked();if(k=='-'){m=1;break;}if('0'<=k&&k<='9'){x=k-'0';break;}}for(;;){k = getchar_unlocked();if(k<'0'||k>'9'){break;}x=x*10+k-'0';}if(m){x=-x;}}inline void wt_L(char a){putchar_unlocked(a);}inline void wt_L(int x){int s=0;int m=0;char f[10];if(x<0){m=1;x=-x;}while(x){f[s++]=x%10;x/=10;}if(!s){f[s++]=0;}if(m){putchar_unlocked('-');}while(s--){putchar_unlocked(f[s]+'0');}}inline void wt_L(long long x){int s=0;int m=0;char f[20];if(x<0){m=1;x=-x;}while(x){f[s++]=x%10;x/=10;}if(!s){f[s++]=0;}if(m){putchar_unlocked('-');}while(s--){putchar_unlocked(f[s]+'0');}}struct graph{int N;int *es;int **edge;void setEdge(int N__, int M, int A[], int B[], void **mem = &wmem){int i;N = N__;walloc1d(&es, N, mem);walloc1d(&edge, N, mem);for(i=(0);i<(N);i++){es[i] = 0;}for(i=(0);i<(M);i++){es[A[i]]++;es[B[i]]++;}for(i=(0);i<(N);i++){walloc1d(&edge[i], es[i], mem);}for(i=(0);i<(N);i++){es[i] = 0;}for(i=(0);i<(M);i++){edge[A[i]][es[A[i]]++] = B[i];edge[B[i]][es[B[i]]++] = A[i];}}void getDist(int root, int res[], void *mem = wmem){int i;int j;int k;int*q;int s;int z;walloc1d(&q, N, &mem);for(i=(0);i<(N);i++){res[i]=-1;}res[root]=0;s=0;z=1;q[0]=root;while(z){i=q[s++];z--;for(j=(0);j<(es[i]);j++){k=edge[i][j];if(res[k]>=0){continue;}res[k]=res[i]+1;q[s+z++]=k;}}}};int N;int K;int A[100000];int B[100000];int d[100000];graph g;int main(){int i;wmem = memarr;long long res = 0;rd(N);rd(K);{int Lj4PdHRW;for(Lj4PdHRW=(0);Lj4PdHRW<(N-1);Lj4PdHRW++){rd(A[Lj4PdHRW]);A[Lj4PdHRW] += (-1);rd(B[Lj4PdHRW]);B[Lj4PdHRW] += (-1);}}if(K > N){wt_L(-1);wt_L('\n');return 0;}g.setEdge(N,N-1,A,B);g.getDist(0,d);sortA_L(N,d);for(i=(0);i<(K);i++){res += d[i];}wt_L(res);wt_L('\n');return 0;}// cLay varsion 20200217-1// --- original code ---// int N, K, A[1d5], B[1d5];// int d[1d5];// graph g;// {// ll res = 0;// rd(N,K,(A--,B--)(N-1));// if(K > N) wt(-1), return 0;// g.setEdge(N,N-1,A,B);// g.getDist(0,d);// sortA(N,d);// rep(i,K) res += d[i];// wt(res);// }