Submission #955742

#	Time	Username	Problem	Language	Result	Execution time	Memory
955742		vjudge1	Pinball (JOI14_pinball)	C++17	11 / 100	42 ms	8536 KiB

pinball

#include <bits/stdc++.h>

#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
//#define int long long

using namespace std;

using ll = long long;
using ull = unsigned long long;
using ld = long double;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

const int mod = 1e9 + 7;
const int LOG = 20;
const int maxn = 1e5 + 5;
const double eps = 1e-9;

ll dp[2][505][505];

int32_t main() {
    int n, m;
    cin >> n >> m;

    vector<array<int, 4> > v(n+2);
    set<int> s; s.insert(1); s.insert(m);

    for(int i=1; i<=n; i++) {
        cin >> v[i][0] >> v[i][1] >> v[i][2] >> v[i][3];
        s.insert(v[i][0]);
        s.insert(v[i][1]);
        s.insert(v[i][2]);
    }

    vector<int> comp(all(s));

    for(int i=1; i<=n; i++) {
        v[i][0] = lower_bound(all(comp), v[i][0]) - comp.begin();
        v[i][1] = lower_bound(all(comp), v[i][1]) - comp.begin();
        v[i][2] = lower_bound(all(comp), v[i][2]) - comp.begin();
    }

    for(int i=0; i<comp.size(); i++)
        for(int j=i; j<comp.size(); j++) dp[0][i][j] = dp[1][i][j] = 1e16;
    for(int i=0; i<comp.size(); i++) dp[0][i][i] = 0;

    for(int i=n+1; i>=2; i--) {
        for(int j=0; j<comp.size(); j++) {
            for(int k=j; k<comp.size(); k++) {
                if(dp[0][j][k] >= 1e16) continue;
                dp[1][j][k] = min(dp[1][j][k], dp[0][j][k]);
                if(j <= v[i-1][2] && v[i-1][2] <= k) {
                    int l = min(j, v[i-1][0]);
                    int r = max(k, v[i-1][1]);
                    dp[1][l][r] = min(dp[1][l][r], dp[0][j][k] + v[i-1][3]);
                }
            }
        }
        swap(dp[0], dp[1]);
    }

    if(dp[0][0][comp.size()-1] >= 1e16) cout << -1 << '\n';
    else cout << dp[0][0][comp.size()-1] << '\n';
    return 0;
}

Compilation message (stderr)

pinball.cpp: In function 'int32_t main()':
pinball.cpp:45:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |     for(int i=0; i<comp.size(); i++)
      |                  ~^~~~~~~~~~~~
pinball.cpp:46:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |         for(int j=i; j<comp.size(); j++) dp[0][i][j] = dp[1][i][j] = 1e16;
      |                      ~^~~~~~~~~~~~
pinball.cpp:47:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |     for(int i=0; i<comp.size(); i++) dp[0][i][i] = 0;
      |                  ~^~~~~~~~~~~~
pinball.cpp:50:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   50 |         for(int j=0; j<comp.size(); j++) {
      |                      ~^~~~~~~~~~~~
pinball.cpp:51:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |             for(int k=j; k<comp.size(); k++) {
      |                          ~^~~~~~~~~~~~

• Subtask 1: 11 / 11
• Subtask 2: 0 / 18
• Subtask 3: 0 / 22
• Subtask 4: 0 / 49