This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#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=0; i<=n+1; i++)
for(int j=0; j<comp.size(); j++)
for(int k=0; k<comp.size(); k++) dp[i][j][k] = 1e16;
for(int i=0; i<=comp.size(); i++) dp[n+1][i][i] = 0;
for(int i=n+1; i>=1; i--) {
for(int j=0; j<comp.size(); j++) {
for(int k=j; k<comp.size(); k++) {
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[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: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=0; k<comp.size(); k++) dp[i][j][k] = 1e16;
| ~^~~~~~~~~~~~
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++) {
| ~^~~~~~~~~~~~
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