Submission #667530

# Submission time Handle Problem Language Result Execution time Memory
667530 2022-12-01T16:55:33 Z Nursik Climbers (RMI18_climbers) C++14
0 / 100
82 ms 195992 KB
#include <stdio.h>
 
#include <algorithm>
#include <bitset>
#include <cassert>
#include <cmath>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <deque>
#include <fstream>
#include <functional>
#include <iomanip>
#include <iostream>
#include <iterator>
#include <list>
#include <map>
#include <queue>
#include <random>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <vector>
//#include<bits/stdc++.h>
using namespace std;
 
#define ll long long
#define pb push_back
#define mp make_pair
#define f first
#define s second
#define ld long double
 
const ll maxn = 5e3 + 1, maxm = 1e6 + 1;
const ll mod = 1e9 + 7, inf = 1e9, block = 550, hb = 31, base = 1000050017, biginf = 5e18;
const ld eps = 1e-9;
 
int n;
int a[maxn];
ll dp[maxn][maxn];
set<pair<ll, pair<int, int>>> setik;
vector<int> vec;
bool is(int i, int j){
    return (a[j] <= a[i] && a[i] <= a[j + 1] || a[i] >= a[j + 1] && a[i] <= a[j]);
}
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0); 
    cin >> n;
    for (int i = 1; i <= n; ++i){
        cin >> a[i];
    }
    vec.pb(a[1]);
    for (int i = 2; i < n; ++i){
        if (a[i] < a[i - 1] && a[i] < a[i + 1] || a[i - 1] < a[i] && a[i] > a[i + 1]){
            vec.pb(a[i]);
        }
    }
    vec.pb(a[n]);
    n = (int)vec.size();
    for (int i = 0; i < n; ++i){
        a[i + 1] = vec[i];
    }
    for (int i = 1; i <= n; ++i){
        for (int j = 1; j <= n; ++j){
            dp[i][j] = inf * inf;
        }
    }
    dp[1][n - 1] = 0;
    setik.insert(mp(0, mp(1, n - 1)));
    while (setik.size() > 0){
        pair<ll, pair<int, int>> cur = *setik.begin();
        ll cost = cur.f, x = cur.s.f, y = cur.s.s;
        setik.erase(cur);
        if (x == y || x == y + 1){
            cout << cost;
            exit(0);
        }
        if (cost > dp[x][y])
            continue;
        if (x < n && is(x + 1, y) && dp[x + 1][y] > dp[x][y] + abs(a[x] - a[x + 1])){
            dp[x + 1][y] = dp[x][y] + abs(a[x] - a[x + 1]);
            setik.insert(mp(dp[x + 1][y], mp(x + 1, y)));
        }
        if (x > 1 && is(x - 1, y) && dp[x - 1][y] > dp[x][y] + abs(a[x] - a[x - 1])){
            dp[x - 1][y] = dp[x][y] + abs(a[x] - a[x - 1]);
            setik.insert(mp(dp[x - 1][y], mp(x - 1, y)));
        }
        if (is(y, x) && dp[y][x] > dp[x][y] + abs(a[x] - a[y])){
            dp[y][x] = dp[x][y] + abs(a[x] - a[y]);
            setik.insert(mp(dp[y][x], mp(y, x)));
        }
        if (x > 1 && is(y, x - 1) && dp[y][x - 1] > dp[x][y] + abs(a[x] - a[y])){
            dp[y][x - 1] = dp[x][y] + abs(a[x] - a[y]);
            setik.insert(mp(dp[y][x - 1], mp(y, x - 1)));
        }
        if (is(y + 1, x) && dp[y + 1][x] > dp[x][y] + abs(a[x] - a[y + 1])){
            dp[y + 1][x] = dp[x][y] + abs(a[x] - a[y + 1]);
            setik.insert(mp(dp[y + 1][x], mp(y + 1, x)));
        }
    }

}

Compilation message

climbers.cpp: In function 'bool is(int, int)':
climbers.cpp:48:26: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   48 |     return (a[j] <= a[i] && a[i] <= a[j + 1] || a[i] >= a[j + 1] && a[i] <= a[j]);
      |             ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~
climbers.cpp: In function 'int main()':
climbers.cpp:60:29: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   60 |         if (a[i] < a[i - 1] && a[i] < a[i + 1] || a[i - 1] < a[i] && a[i] > a[i + 1]){
      |             ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 724 KB Output isn't correct
2 Incorrect 1 ms 2132 KB Output isn't correct
3 Incorrect 5 ms 12120 KB Output isn't correct
4 Incorrect 35 ms 82644 KB Output isn't correct
5 Incorrect 82 ms 195992 KB Output isn't correct
# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 340 KB Output isn't correct
2 Incorrect 1 ms 468 KB Output isn't correct
3 Incorrect 1 ms 1100 KB Output isn't correct
4 Incorrect 1 ms 724 KB Output isn't correct
5 Incorrect 2 ms 3020 KB Output isn't correct
# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 724 KB Output isn't correct
2 Incorrect 1 ms 2004 KB Output isn't correct
3 Incorrect 5 ms 11392 KB Output isn't correct
4 Incorrect 32 ms 75960 KB Output isn't correct
5 Incorrect 33 ms 75460 KB Output isn't correct
6 Incorrect 54 ms 137668 KB Output isn't correct
7 Incorrect 54 ms 130164 KB Output isn't correct
8 Incorrect 76 ms 185916 KB Output isn't correct
9 Incorrect 72 ms 187724 KB Output isn't correct
10 Incorrect 76 ms 185540 KB Output isn't correct