제출 #982934

#제출 시각아이디문제언어결과실행 시간메모리
982934shjeong밀림 점프 (APIO21_jumps)C++17
컴파일 에러
0 ms0 KiB
#include "jumps.h" #include <iostream> #include <cmath> #include <algorithm> #include <numeric> #include <cstring> #include <vector> #include <string> #include <climits> #include <map> #include <set> #include <stack> #include <queue> #include <bitset> #include <cassert> #include <list> using namespace std; typedef long long ll; ll n; struct segtree{ vector<pair<ll,ll>> tree; segtree(): tree(808080){} void init(ll node, ll s, ll e, vector<ll> &v){ if(s==e)tree[node] = {v[s],s}; else{ ll mid = s+e>>1; init(node<<1,s,mid,v); init(node<<1|1,mid+1,e,v); tree[node] = max(tree[node<<1],tree[node<<1|1]); } } pair<ll,ll> query(ll node, ll s, ll e, ll l, ll r){ if(l>r)return -1; if(e<l or r<s)return 0; if(l<=s and e<=r)return tree[node]; ll mid = s+e>>1; return max(query(node<<1,s,mid,l,r), query(node<<1|1,mid+1,e,l,r)); } pair<ll,ll> Q(ll l, ll r){ return query(1,1,n,l,r); } } seg; vector<ll> v; ll L[202020][22]; ll R[202020][22]; ll M[202020][22]; void init(int N, std::vector<int> H) { n=N; v.push_back(0); for(int i = 1 ; i <= n ; i++)v.push_back(H[i-1]); seg.init(1,1,n,v); stack<ll> st; for(int i = 1 ; i <= n ; i++){ while(st.size() and v[st.top()] < v[i]){ R[st.top()][0] = i; st.pop(); } st.push(i); } while(st.size())st.pop(); for(int i = n ; i >= 1 ; i--){ while(st.size() and v[st.top()] < v[i]){ L[st.top()][0] = i; st.pop(); } st.push(i); } for(int i = 1 ; i <= n ; i++){ M[i][0] = (v[L[i][0]] > v[R[i][0]] ? L[i][0] : R[i][0]); } for(int j = 1 ; j <= 20 ; j++){ for(int i = 1 ; i <= n ; i++){ L[i][j] = L[L[i][j-1]][j-1]; R[i][j] = R[R[i][j-1]][j-1]; M[i][j] = M[M[i][j-1]][j-1]; } } } ll AB, BC, CD; ll c; pair<ll,ll> move_R(ll x){ //몇번 이동해야 좌표가 C 이상인가? ll ret = 0; for(int i = 20 ; i >= 0 ; i--){ if(R[x][i]<=0)continue; if(R[x][i] < c)ret += (1<<i), x = R[x][i]; } return {ret+1,R[x][0]}; } int minimum_jumps(int A, int B, int C, int D) { A++; B++; C++; D++; c=C; AB = seg.Q(A,B).first, BC = seg.Q(B+1,C-1).first, CD = seg.Q(C,D).first; ll ret = 1e9; if(v[B] < BC){ //BC 미만인 가장 큰놈부터 ll t = seg.Q(B+1,C-1).second; ll res = 0; ll cur = B; for(int i = 20 ; i >= 0 ; i--){ if(L[cur][i]<=0)continue; if(L[cur][i]>=A and v[L[cur][i]] < v[t])cur = L[cur][i]; } for(int i = 20 ; i >= 0 ; i--){ if(M[cur][i]<=0)continue; if(v[M[cur][i]]<v[t] and R[cur][i]>0 and R[cur][i]<t)cur = M[cur][i], res += (1<<i); } for(int i = 20 ; i >= 0 ; i--){ if(R[cur][i]<=0)continue; if(R[cur][i]<t)cur = R[cur][i], res += (1<<i); } res++; cur = R[cur][0]; if(cur==t)ret = min(ret, res+1); } if(AB>BC){ //BC 초과인 가장 작은놈부터 ll cur = B; for(int i = 20 ; i >= 0 ; i--){ if(L[cur][i]<=0)continue; if(v[L[cur][i]] < BC)cur = L[cur][i]; } if(v[cur]<BC)cur = L[cur][0]; assert(cur>=A); auto [res,e] = move_R(cur); if(e>=C and e<=D){ ret = min(ret, res); } } if(AB<BC){ //제일 큰놈 ll cur = B; for(int i = 20 ; i >= 0 ; i--){ if(L[cur][i]<=0)continue; if(L[cur][i]>=A)cur = L[cur][i]; } ll res = 0; for(int i = 20 ; i >= 0 ; i--){ if(L[cur][i]<=0)continue; if(v[L[cur][i]] <= BC)res += (1<<i), cur = L[cur][i]; } res++; cur = L[cur][0]; auto [res2,e] = move_R(cur); if(e>=C and e<=D){ ret = min(ret, res+res2); } } if(ret==1e9)ret = -1; return ret; }

컴파일 시 표준 에러 (stderr) 메시지

jumps.cpp: In member function 'void segtree::init(ll, ll, ll, std::vector<long long int>&)':
jumps.cpp:26:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   26 |             ll mid = s+e>>1;
      |                      ~^~
jumps.cpp: In member function 'std::pair<long long int, long long int> segtree::query(ll, ll, ll, ll, ll)':
jumps.cpp:32:24: error: could not convert '-1' from 'int' to 'std::pair<long long int, long long int>'
   32 |         if(l>r)return -1;
      |                        ^
      |                        |
      |                        int
jumps.cpp:33:30: error: could not convert '0' from 'int' to 'std::pair<long long int, long long int>'
   33 |         if(e<l or r<s)return 0;
      |                              ^
      |                              |
      |                              int
jumps.cpp:35:19: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   35 |         ll mid = s+e>>1;
      |                  ~^~