Submission #955725

#	Time	Username	Problem	Language	Result	Execution time	Memory
955725		vjudge1	Pinball (JOI14_pinball)	C++17	11 / 100	220 ms	403940 KiB

pinball

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
#define int long long

ll dp[205][505][505];

int32_t main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);

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

    for(int i=1; i<=n+1; i++)
        for(int j=0; j<comp.size(); j++)
            for(int k=j; k<comp.size(); k++) dp[i][j][k] = 1e14;

    for(int i=0; i<comp.size(); i++) dp[n+1][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[i][j][k] >= 1e14) continue;
                dp[i-1][j][k] = min(dp[i-1][j][k], dp[i][j][k]);
                if(j <= v[i-1][2] && v[i-1][2] <= k) dp[i-1][min(j, v[i-1][0])][max(k, v[i-1][1])] = min(dp[i-1][min(j, v[i-1][0])][max(k, v[i-1][1])], dp[i][j][k] + v[i-1][3]);
            }
        }
    }

    if(dp[1][0][comp.size()-1] >= 1e14) cout << -1 << '\n';
    else cout << dp[1][0][comp.size()-1] << '\n';
    return 0;
}

Compilation message (stderr)

pinball.cpp: In function 'int32_t main()':
pinball.cpp:34:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |         for(int j=0; j<comp.size(); j++)
      |                      ~^~~~~~~~~~~~
pinball.cpp:35:27: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |             for(int k=j; k<comp.size(); k++) dp[i][j][k] = 1e14;
      |                          ~^~~~~~~~~~~~
pinball.cpp:37:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |     for(int i=0; i<comp.size(); i++) dp[n+1][i][i] = 0;
      |                  ~^~~~~~~~~~~~
pinball.cpp:40:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |         for(int j=0; j<comp.size(); j++) {
      |                      ~^~~~~~~~~~~~
pinball.cpp:41:27: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |             for(int k=j; k<comp.size(); k++) {
      |                          ~^~~~~~~~~~~~

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