제출 #262932

#제출 시각아이디문제언어결과실행 시간메모리
262932dantoh000코끼리 (Dancing Elephants) (IOI11_elephants)C++14
컴파일 에러
0 ms0 KiB
#include <bits/stdc++.h> #define K 500 using namespace std; #include "elephants.h" int n, l, x[150005]; struct BUCKET{ int a[150005], ct[150005], r[150005], sz; void comp(){ int k = sz-1; for (int i = sz-1; i >= 0; i--){ while (k > i && a[k-1] - a[i] > l) k--; if (a[sz-1] - a[i] <= l){ ct[i] = 1; r[i] = a[i]+L; } else ct[i] = ct[k]+1, r[i] = r[k]; //printf("%d -> %d: ct = %d, r = %d\n",a[i],a[k],ct[i],r[i]); } } } bk[305]; void init(int N, int L, int X[]) { n = N; l = L; for (int i = 0; i < n; i++) x[i] = X[i]; for (int i = 0; i <= n/K; i++){ bk[i].sz = 0; for (int j = i*K; j < min((i+1)*K,n); j++){ bk[i].a[j%K] = x[j]; bk[i].sz++; } bk[i].comp(); } } void rebuild_all(){ int N = 0; for (int i = 0; i <= n/K; i++){ for (int j = 0; j < bk[i].sz; j++){ x[N++] = bk[i].a[j]; } } for (int i = 0; i <= n/K; i++){ bk[i].sz = 0; for (int j = i*K; j < min((i+1)*K,n); j++){ bk[i].a[j%K] = x[j]; bk[i].sz++; } bk[i].comp(); } } void add(int x){ //printf("adding %d\n",x); for (int i = 0; i <= n/K; i++){ if (bk[i].sz == 0) continue; if ((bk[i].a[0] <= x && x <= bk[i].a[bk[i].sz-1]) || i == (n-1)/K){ //printf("adding to bucket %d\n",i); if (bk[i].a[0] > x){ //printf("position %d\n",0); for (int k = bk[i].sz-1; k >= 0; k--){ bk[i].a[k+1] = bk[i].a[k]; } bk[i].a[0] = x; } else{ for (int j = 0; j <= bk[i].sz; j++){ if ((bk[i].a[j] >= x && bk[i].a[j+1] < x) || j == bk[i].sz){ //printf("position %d\n",j); for (int k = bk[i].sz-1; k >= j; k--){ bk[i].a[k+1] = bk[i].a[k]; } bk[i].a[j] = x; break; } } } bk[i].sz++; bk[i].comp(); break; } } } void del(int x){ //printf("deleting %d\n",x); for (int i = 0; i <= n/K; i++){ if (bk[i].sz == 0) continue; if (bk[i].a[0] <= x && x <= bk[i].a[bk[i].sz-1]){ //printf("deleting from bucket %d\n",i); for (int j = 0; j < bk[i].sz; j++){ if (bk[i].a[j] == x){ //printf("position %d\n",j); for (int k = j; k < bk[i].sz; k++){ bk[i].a[k] = bk[i].a[k+1]; } break; } } bk[i].a[bk[i].sz] = 0; bk[i].sz--; bk[i].comp(); break; } } } int solve(){ //printf("solving\n"); int curpos = -1; int ans = 0; for (int i = 0; i <= n/K; i++){ if (bk[i].sz == 0) continue; if (curpos == -1){ ans += bk[i].ct[0]; curpos = bk[i].r[0]; continue; } int nx = upper_bound(bk[i].a, bk[i].a+bk[i].sz,curpos+l) - bk[i].a; ans += bk[i].ct[nx]; curpos = bk[i].r[nx]; } return ans; } void debug(){ for (int i = 0; i <= n/K; i++){ printf("bucket %d: ",i); for (int j = 0; j < bk[i].sz; j++){ printf("%d ",bk[i].a[j]); } printf("\n"); } } int numQ = 0; int update(int i, int y) { if (++numQ == K){ rebuild_all(); numQ = 0; } del(x[i]); x[i] = y; add(x[i]); //debug(); return solve(); }

컴파일 시 표준 에러 (stderr) 메시지

elephants.cpp: In member function 'void BUCKET::comp()':
elephants.cpp:14:40: error: 'L' was not declared in this scope
   14 |                 ct[i] = 1; r[i] = a[i]+L;
      |                                        ^