結果
問題 | No.1244 Black Segment |
ユーザー | LayCurse |
提出日時 | 2020-10-02 22:52:38 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 11 ms / 2,000 ms |
コード長 | 5,571 bytes |
コンパイル時間 | 2,424 ms |
コンパイル使用メモリ | 214,456 KB |
実行使用メモリ | 14,644 KB |
最終ジャッジ日時 | 2024-07-17 22:52:47 |
合計ジャッジ時間 | 3,968 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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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
7,624 KB |
testcase_01 | AC | 2 ms
7,624 KB |
testcase_02 | AC | 3 ms
11,720 KB |
testcase_03 | AC | 2 ms
7,624 KB |
testcase_04 | AC | 2 ms
7,620 KB |
testcase_05 | AC | 2 ms
7,500 KB |
testcase_06 | AC | 2 ms
7,628 KB |
testcase_07 | AC | 3 ms
11,720 KB |
testcase_08 | AC | 3 ms
9,668 KB |
testcase_09 | AC | 2 ms
7,620 KB |
testcase_10 | AC | 2 ms
9,800 KB |
testcase_11 | AC | 2 ms
7,628 KB |
testcase_12 | AC | 2 ms
9,800 KB |
testcase_13 | AC | 3 ms
7,528 KB |
testcase_14 | AC | 5 ms
8,904 KB |
testcase_15 | AC | 2 ms
9,668 KB |
testcase_16 | AC | 6 ms
8,908 KB |
testcase_17 | AC | 2 ms
7,652 KB |
testcase_18 | AC | 6 ms
10,548 KB |
testcase_19 | AC | 8 ms
13,848 KB |
testcase_20 | AC | 10 ms
11,216 KB |
testcase_21 | AC | 8 ms
13,772 KB |
testcase_22 | AC | 9 ms
13,896 KB |
testcase_23 | AC | 9 ms
12,748 KB |
testcase_24 | AC | 9 ms
12,908 KB |
testcase_25 | AC | 9 ms
12,748 KB |
testcase_26 | AC | 9 ms
14,036 KB |
testcase_27 | AC | 8 ms
12,936 KB |
testcase_28 | AC | 10 ms
13,828 KB |
testcase_29 | AC | 10 ms
14,292 KB |
testcase_30 | AC | 10 ms
12,780 KB |
testcase_31 | AC | 10 ms
13,196 KB |
testcase_32 | AC | 11 ms
13,348 KB |
testcase_33 | AC | 11 ms
12,864 KB |
testcase_34 | AC | 9 ms
14,136 KB |
testcase_35 | AC | 9 ms
14,644 KB |
testcase_36 | AC | 9 ms
14,160 KB |
testcase_37 | AC | 8 ms
12,928 KB |
testcase_38 | AC | 8 ms
11,308 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'); } } template<class S> inline void arrInsert(const int k, int &sz, S a[], const S aval){ int i; sz++; for(i=sz-1;i>k;i--){ a[i] = a[i-1]; } a[k] = aval; } template<class S, class T> inline void arrInsert(const int k, int &sz, S a[], const S aval, T b[], const T bval){ int i; sz++; for(i=sz-1;i>k;i--){ a[i] = a[i-1]; } for(i=sz-1;i>k;i--){ b[i] = b[i-1]; } a[k] = aval; b[k] = bval; } template<class S, class T, class U> inline void arrInsert(const int k, int &sz, S a[], const S aval, T b[], const T bval, U c[], const U cval){ int i; sz++; for(i=sz-1;i>k;i--){ a[i] = a[i-1]; } for(i=sz-1;i>k;i--){ b[i] = b[i-1]; } for(i=sz-1;i>k;i--){ c[i] = c[i-1]; } a[k] = aval; b[k] = bval; c[k] = cval; } template<class S, class T, class U, class V> inline void arrInsert(const int k, int &sz, S a[], const S aval, T b[], const T bval, U c[], const U cval, V d[], const V dval){ int i; sz++; for(i=sz-1;i>k;i--){ a[i] = a[i-1]; } for(i=sz-1;i>k;i--){ b[i] = b[i-1]; } for(i=sz-1;i>k;i--){ c[i] = c[i-1]; } for(i=sz-1;i>k;i--){ d[i] = d[i-1]; } a[k] = aval; b[k] = bval; c[k] = cval; d[k] = dval; } 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 getDist(int a, int b, void *mem = wmem){ int i; int j; int k; int*q; int s; int z; int*d; if(a==b){ return 0; } walloc1d(&d, N, &mem); walloc1d(&q, N, &mem); for(i=(0);i<(N);i++){ d[i] = -1; } d[a] = 0; s = 0; z = 1; q[0] = a; while(z){ i = q[s++]; z--; for(j=(0);j<(es[i]);j++){ k = edge[i][j]; if(d[k] >= 0){ continue; } d[k] = d[i] + 1; if(k==b){ return d[k]; } q[s+z++] = k; } } return -1; } } ; int N; int M; int A; int B; int L[300000]; int R[300000]; graph g; int dis[300000]; int main(){ int i; wmem = memarr; int st; int ed; int res; rd(N);N += (1); rd(M); rd(A);A += (-1); rd(B); { int Lj4PdHRW; for(Lj4PdHRW=(0);Lj4PdHRW<(M);Lj4PdHRW++){ rd(L[Lj4PdHRW]);L[Lj4PdHRW] += (-1); rd(R[Lj4PdHRW]); } } st = N++; ed = N++; for(i=(0);i<(A+1);i++){ arrInsert(M,M,L,st,R,i); } for(i=(B);i<(N-2);i++){ arrInsert(M,M,L,i,R,ed); } g.setEdge(N,M,L,R); res = g.getDist(st, ed) - 2; if(res<0){ wt_L(-1); wt_L('\n'); } else{ wt_L(res); wt_L('\n'); } return 0; } // cLay varsion 20200926-1 // --- original code --- // int N, M, A, B, L[3d5], R[3d5]; // graph g; // int dis[3d5]; // { // int st, ed, res; // rd(N++,M,A--,B,(L--,R)(M)); // st = N++; // ed = N++; // rep(i,A+1) arrInsert(M,M,L,st,R,i); // rep(i,B,N-2) arrInsert(M,M,L,i,R,ed); // g.setEdge(N,M,L,R); // res = g.getDist(st, ed) - 2; // wt(if[res<0, -1, res]); // }