제출 #1020987

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1020987		MohamedFaresNebili	밀림 점프 (APIO21_jumps)	C++14	4 / 100	1451 ms	105408 KiB

jumps

    #include <bits/stdc++.h>
                     
                            using namespace std;
                     
                            int N;
                            int P[200005];
                            int MX[800005];
                            int L[200005], R[200005];
                            int par[200005][20];
                            vector<int> ST[800005];
                            vector<int> adj[200005];
                            int UP[200005][20], DN[200005][20];
                            vector<int> H;
                 
                            void build(int v, int l, int r) {
                                if(l == r) {
                                    ST[v].push_back(P[l]);
                                    return;
                                }
                                build(v * 2, l, (l + r) / 2);
                                build(v * 2 + 1, (l + r) / 2 + 1, r);
                                
                                int i = 0, j = 0;
                                while(i < ST[v * 2].size() || j < ST[v * 2 + 1].size()) {
                                    if(i == ST[v * 2].size())
                                        ST[v].push_back(ST[v * 2 + 1][j++]);
                                    else if(j == ST[v * 2 + 1].size())
                                        ST[v].push_back(ST[v * 2][i++]);
                                    else {
                                        if(ST[v * 2][i] < ST[v * 2 + 1][j])
                                            ST[v].push_back(ST[v * 2][i++]);
                                        else ST[v].push_back(ST[v * 2 + 1][j++]);
                                    }
                                }
                            }
                 
                            void buildM(int v, int l, int r) {
                                if(l == r) {
                                    MX[v] = H[l];
                                    return;
                                }
                                buildM(v * 2, l, (l + r) / 2);
                                buildM(v * 2 + 1, (l + r) / 2 + 1, r);
                                MX[v] = max(MX[v * 2], MX[v * 2 + 1]);
                            }
                 
                            int query(int v, int l, int r, int lo, int hi) {
                                if(l > hi || r < lo) return 0;
                                if(l >= lo && r <= hi) return MX[v];
                                return max(query(v * 2, l, (l + r) / 2, lo, hi),
                                    query(v * 2 + 1, (l + r) / 2 + 1, r, lo, hi));
                            }
                 
                            int queryR(int v, int l, int r, int lo, int hi, int K) {
                                if(l > hi || r < lo) return 1e9 + 7;
                                if(l >= lo && r <= hi) {
                                    int rf = lower_bound(ST[v].begin(), ST[v].end(), K) - ST[v].begin();
                                    if(rf == ST[v].size()) return 1e9 + 7;
                                    return ST[v][rf];
                                }
                                return min(queryR(v * 2, l, (l + r) / 2, lo, hi, K), 
                                    queryR(v * 2 + 1, (l + r) / 2 + 1, r, lo, hi, K));
                            }
                 
                            int queryL(int v, int l, int r, int lo, int hi, int K) {
                                if(l > hi || r < lo) return -1;
                                if(l >= lo && r <= hi) {
                                    int lf = lower_bound(ST[v].begin(), ST[v].end(), K) - ST[v].begin();
                                    if(lf == 0) return -1;
                                    return ST[v][--lf];
                                }
                                return max(queryL(v * 2, l, (l + r) / 2, lo, hi, K), 
                                    queryL(v * 2 + 1, (l + r) / 2 + 1, r, lo, hi, K));
                            }
                     
                            void init(int _N, vector<int> _H) {
                                
                                N = _N;
                                for(int l = 0; l < _N; l++) {
                                    H.push_back(_H[l]);
                                    P[_H[l]] = l;
                                }
                 
                                for(int l = 0; l < 20; l++) {
                                    R[N + 1] = N + 1, L[N + 1] = N + 1, UP[N + 1][l] = DN[N + 1][l] = N + 1;
                                  	par[N + 1][l] = N + 1;
                                }
                              
                                
                 
                                build(1, 1, N);
                                buildM(1, 0, N - 1);
                     
                                for(int l = 0; l < _N; l++) {
                                    int i = queryL(1, 1, N, _H[l] + 1, N, l);
                                    int j = queryR(1, 1, N, _H[l] + 1, N, l);
                 
                                    L[l] = UP[l][0] = (i != -1 ? i : N + 1);
                                    R[l] = DN[l][0] = (j != 1e9 + 7 ? j : N + 1);
                                    par[l][0] = R[l];
                 
                                    if(_H[R[l]] < _H[L[l]]) 
                                        swap(UP[l][0], DN[l][0]);
                                }
                 
                                for(int l = 1; l < 20; l++)
                                    for(int i = 0; i < _N; i++) {
                                        UP[i][l] = UP[UP[i][l - 1]][l - 1];
                                        DN[i][l] = DN[DN[i][l - 1]][l - 1];
                                        par[i][l] = par[par[i][l - 1]][l - 1];
                                    }
                            }
                 
                            int solve(int U, int C, int D) {
                                int best = 0;
                                if(R[U] >= C && R[U] <= D) return 1;
                 
                                for(int l = 19; l >= 0; l--)
                                    if(R[UP[U][l]] < C) best += (1 << l), U = UP[U][l];
                 
                                if(R[UP[U][0]] >= C && R[UP[U][0]] <= D) return 2 + best;
                              	if(UP[U][0] >= C && UP[U][0] <= D) return 1 + best;
                 
                                for(int l = 19; l >= 0; l--) 
                                    if(R[DN[U][l]] < C) best += (1 << l), U = DN[U][l];
                 
                                if(R[DN[U][0]] >= C && R[DN[U][0]] <= D) return 2 + best;
                              	if(DN[U][0] >= C && DN[U][0] <= D) return 1 + best;
                                return -1;
                            }
                     
                            int minimum_jumps(int A, int B, int C, int D) {
                                int lo = A, hi = B, ans = -1;
                                int G = query(1, 0, N - 1, C, D);
                                while(lo <= hi) {
                                    int md = (lo + hi) / 2;
                                    int q = query(1, 0, N - 1, md, B);
                                    if(q < G) ans = md, hi = md - 1;
                                    else lo = md + 1;
                                }
                                if(ans == -1) return -1;
                                int U = query(1, 0, N - 1, ans, B); U = P[U];
                                int res = solve(U, C, D);
                                return (res > N ? -1 : res);
                            }

컴파일 시 표준 에러 (stderr) 메시지

jumps.cpp: In function 'void build(int, int, int)':
jumps.cpp:24:41: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |                                 while(i < ST[v * 2].size() || j < ST[v * 2 + 1].size()) {
      |                                       ~~^~~~~~~~~~~~~~~~~~
jumps.cpp:24:65: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |                                 while(i < ST[v * 2].size() || j < ST[v * 2 + 1].size()) {
      |                                                               ~~^~~~~~~~~~~~~~~~~~~~~~
jumps.cpp:25:42: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |                                     if(i == ST[v * 2].size())
      |                                        ~~^~~~~~~~~~~~~~~~~~~
jumps.cpp:27:47: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |                                     else if(j == ST[v * 2 + 1].size())
      |                                             ~~^~~~~~~~~~~~~~~~~~~~~~~
jumps.cpp: In function 'int queryR(int, int, int, int, int, int)':
jumps.cpp:58:43: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |                                     if(rf == ST[v].size()) return 1e9 + 7;
      |                                        ~~~^~~~~~~~~~~~~~~

• Subtask 1: 4 / 4
• Subtask 2: 0 / 8
• Subtask 3: 0 / 13
• Subtask 4: 0 / 12
• Subtask 5: 0 / 23
• Subtask 6: 0 / 21
• Subtask 7: 0 / 19