結果
問題 | No.1103 Directed Length Sum |
ユーザー | LayCurse |
提出日時 | 2020-07-03 21:25:39 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 4,036 bytes |
コンパイル時間 | 2,502 ms |
コンパイル使用メモリ | 213,468 KB |
実行使用メモリ | 57,352 KB |
最終ジャッジ日時 | 2024-09-16 21:37:34 |
合計ジャッジ時間 | 5,644 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,376 KB |
testcase_02 | WA | - |
testcase_03 | AC | 48 ms
39,680 KB |
testcase_04 | AC | 104 ms
26,624 KB |
testcase_05 | AC | 254 ms
43,136 KB |
testcase_06 | AC | 47 ms
18,944 KB |
testcase_07 | AC | 10 ms
7,808 KB |
testcase_08 | AC | 16 ms
9,856 KB |
testcase_09 | AC | 7 ms
6,144 KB |
testcase_10 | AC | 20 ms
11,648 KB |
testcase_11 | AC | 104 ms
28,800 KB |
testcase_12 | AC | 47 ms
19,200 KB |
testcase_13 | AC | 21 ms
12,032 KB |
testcase_14 | AC | 7 ms
5,632 KB |
testcase_15 | AC | 32 ms
15,744 KB |
testcase_16 | AC | 146 ms
31,744 KB |
testcase_17 | AC | 146 ms
33,024 KB |
testcase_18 | AC | 21 ms
11,776 KB |
testcase_19 | AC | 123 ms
29,312 KB |
testcase_20 | AC | 9 ms
6,912 KB |
testcase_21 | AC | 14 ms
9,216 KB |
testcase_22 | AC | 91 ms
24,832 KB |
testcase_23 | AC | 36 ms
16,640 KB |
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); } inline int my_getchar_unlocked(){ static char buf[1048576]; static int s = 1048576; static int e = 1048576; if(s == e && e == 1048576){ e = fread_unlocked(buf, 1, 1048576, stdin); s = 0; } if(s == e){ return EOF; } return buf[s++]; } inline void rd(int &x){ int k; int m=0; x=0; for(;;){ k = my_getchar_unlocked(); if(k=='-'){ m=1; break; } if('0'<=k&&k<='9'){ x=k-'0'; break; } } for(;;){ k = my_getchar_unlocked(); if(k<'0'||k>'9'){ break; } x=x*10+k-'0'; } if(m){ x=-x; } } struct MY_WRITER{ char buf[1048576]; int s; int e; MY_WRITER(){ s = 0; e = 1048576; } ~MY_WRITER(){ if(s){ fwrite_unlocked(buf, 1, s, stdout); } } } ; MY_WRITER MY_WRITER_VAR; void my_putchar_unlocked(int a){ if(MY_WRITER_VAR.s == MY_WRITER_VAR.e){ fwrite_unlocked(MY_WRITER_VAR.buf, 1, MY_WRITER_VAR.s, stdout); MY_WRITER_VAR.s = 0; } MY_WRITER_VAR.buf[MY_WRITER_VAR.s++] = a; } inline void wt_L(char a){ my_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){ my_putchar_unlocked('-'); } while(s--){ my_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){ my_putchar_unlocked('-'); } while(s--){ my_putchar_unlocked(f[s]+'0'); } } struct graph{ int N; int *es; int **edge; void setDirectEdge(int N__, int M, int A[], int B[], void **mem = &wmem){ int i; N = N__; walloc1d(&es, N, mem); walloc1d(&edge, N, mem); walloc1d(&edge[0], M, mem); for(i=(0);i<(N);i++){ es[i] = 0; } for(i=(0);i<(M);i++){ es[A[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]; } } 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 A[1000000]; int B[1000000]; graph g; int d[1000000]; int deg[1000000]; int main(){ int i; wmem = memarr; long long res = 0; rd(N); { int Lj4PdHRW; for(Lj4PdHRW=(0);Lj4PdHRW<(N-1);Lj4PdHRW++){ rd(A[Lj4PdHRW]);A[Lj4PdHRW] += (-1); rd(B[Lj4PdHRW]);B[Lj4PdHRW] += (-1); } } if(N==1){ wt_L(0); wt_L('\n'); return 0; } g.setDirectEdge(N, N-1, A, B); for(i=(0);i<(N-1);i++){ deg[B[i]]++; } for(i=(0);i<(N);i++){ if(deg[i]==0){ break; } } g.getDist(i, d); for(i=(0);i<(N);i++){ res += (long long) d[i] * (d[i] + 1) / 2; } wt_L(res); wt_L('\n'); return 0; } // cLay varsion 20200509-1 // --- original code --- // int N, A[1d6], B[1d6]; // graph g; // int d[1d6], deg[1d6]; // { // ll res = 0; // rd(N,(A--,B--)(N-1)); // if(N==1) wt(0), return 0; // g.setDirectEdge(N, N-1, A, B); // rep(i,N-1) deg[B[i]]++; // rep(i,N) if(deg[i]==0) break; // g.getDist(i, d); // rep(i,N) res += (ll) d[i] * (d[i] + 1) / 2; // wt(res); // }