Submission #1185616

#	Time	Username	Problem	Language	Result	Execution time	Memory
1185616		nguyn	Pinball (JOI14_pinball)	C++20	51 / 100	1094 ms	2656 KiB

pinball

#include <bits/stdc++.h>
using namespace std;

#define int long long
#define ll long long 
#define F first
#define S second
#define pb push_back 
#define pii pair<int,int>

const int N = 2e5 + 5;

int n, m, a[N], b[N], c[N], d[N];
pii fl[N], fr[N];
vector<int> cmp;

signed main(){
    ios_base::sync_with_stdio(false) ; 
    cin.tie(0) ; cout.tie(0) ; 
    if (fopen("INP.INP" ,"r")) {
        freopen("INP.INP" ,"r" , stdin) ;
        freopen("OUT.OUT" , "w" , stdout) ;
    }
    cin >> m >> n; 
    for (int i = 1; i <= m; i++) {
    	cin >> a[i] >> b[i] >> c[i] >> d[i];
    	cmp.pb(a[i]);
    	cmp.pb(b[i]);
    	cmp.pb(c[i]);
    }
    cmp.pb(1);
    cmp.pb(n); 
    sort(cmp.begin(), cmp.end());
    cmp.erase(unique(cmp.begin(), cmp.end()), cmp.end()); 
    n = cmp.size();
    for (int i = 1; i <= m; i++) {
    	a[i] = upper_bound(cmp.begin(), cmp.end(), a[i]) - cmp.begin();
    	b[i] = upper_bound(cmp.begin(), cmp.end(), b[i]) - cmp.begin();
    	c[i] = upper_bound(cmp.begin(), cmp.end(), c[i]) - cmp.begin();
    }
   	int res = 1e18;
    for (int i = 1; i <= m; i++) {
    	fl[i] = {a[i], d[i]};
    	fr[i] = {b[i], -d[i]};
    	for (int j = 1; j < i; j++) {
    		if (a[i] <= c[j] && c[j] <= b[i]) {
    			pii x = fl[j];
    			x.S += d[i]; 
    			fl[i] = min(fl[i], x); 
    			x = fr[j]; 
    			x.S -= d[i];
    			fr[i] = max(fr[i], x);
    		}	
    	}
    	if (fl[i].F == 1 && fr[i].F == n) {
    		res = min(res, fl[i].S - fr[i].S - d[i]);  
    	}
    }
    if (res == 1e18) cout << -1;
    else cout << res;
}

Compilation message (stderr)

pinball.cpp: In function 'int main()':
pinball.cpp:21:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |         freopen("INP.INP" ,"r" , stdin) ;
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
pinball.cpp:22:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |         freopen("OUT.OUT" , "w" , stdout) ;
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

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