Submission #523230

#	Time	Username	Problem	Language	Result	Execution time	Memory
523230		mansur	Palembang Bridges (APIO15_bridge)	C++17	22 / 100	72 ms	5788 KiB

bridge

#include<bits/stdc++.h>	
 
#pragma optimize ("g",on)
#pragma GCC optimize ("inline")
#pragma GCC optimize ("Ofast")
#pragma GCC optimize ("unroll-loops")
#pragma GCC optimize ("03")
#pragma GCC target ("sse,sse2,sse3,ssse3,sse4,popcnt,abm,avx2,mmx,fma,avx,tune=native")
 
//01001101 01100001 01101011 01101000 01100001  01100111 01100001 01111001 
 
using namespace std;
 
#define all(a) a.begin(), a.end()                                                   
#define rall(a) a.rbegin(), a.rend()
#define ll long long
#define pb push_back
#define sz(a) a.size()
#define nl '\n'
#define popb pop_back()                                                                   
#define ld double
#define ull unsigned long long
#define ff first                                         
#define ss second  
#define fix fixed << setprecision
#define pii pair<int, int>                          
#define E exit (0)
#define int long long
 
const int inf = 1e15, N = 5e3 + 1, mod = 998244353;                    
 
double eps = 1e-6;
 
vector<pii> dir = {{1, 0}, {0, 1}, {-1, 0}, {0, -1}};
 
main() {                                                         
	//freopen("F.in", "r", stdin);                                                                                     
	//freopen("F.out", "w", stdout);                                                                                     
	ios_base::sync_with_stdio(NULL);                                                                                       
	cin.tie(NULL);
	int k, n;
	cin >> k >> n;
	char t1[n + 1], t2[n + 1];
	int p1[n + 1], p2[n + 1];
	for (int i = 1; i <= n; i++) {
		cin >> t1[i] >> p1[i] >> t2[i] >> p2[i];
	}
	if (k == 1) {
		vector<int> s;
		for (int i = 1; i <= n; i++) {
			if (t1[i] != t2[i]) { 	
				s.pb(p1[i]);
				s.pb(p2[i]);
			}
		}
		sort(all(s));
		int p = -1;
		if (sz(s)) p = s[sz(s) / 2];
		int ans = inf;
		for (int i = -100; i <= 100; i++) {
			p += i;
			int cur = 0;
			for (int j = 1; j <= n; j++) {
	    		if (t1[j] == t2[j]) {
	    			cur += abs(p2[j] - p1[j]);
	    			continue;
	    		}
	    		cur += abs(p1[j] - p) + abs(p2[j] - p) + 1;	
	    	}
	    	p -= i;
	    	ans = min(ans, cur);
	    }
	    cout << ans;
	}else {
		vector<int> s;
		int val = 0;
		for (int i = 1; i <= n; i++) {
			if (t1[i] != t2[i]) { 	
				s.pb(p1[i]);
				s.pb(p2[i]);
			}else val += abs(p2[i] - p1[i]);
		}
		sort(all(s));
	    if (!sz(s)) {
			cout << val;				    	
	    }else {
	    	int ans = inf;
	    	for (int i = 0; i < sz(s); i++) {
	    		int pl = s[i], pr = 0;
	    		if (i) {
	    			pr = s[i / 2]; 
	    		}
	    		int cur = 0;
	    		for (int s = 1; s <= n; s++) {
	    			if (t1[s] != t2[s]) {
	    				cur += min(abs(p1[s] - pl) + abs(p2[s] - pl), abs(p1[s] - pr) + abs(p2[s] - pr)) + 1;	
	    			}
	    		}
	    		ans = min(ans, cur);
	    		if (i < sz(s) - 1) {
	    			pr = s[(sz(s) - i - 1) / 2 + i + 1];
	    		}
	    		cur = 0;
	    		for (int s = 1; s <= n; s++) {
	    			if (t1[s] != t2[s]) {
	    				cur += min(abs(p1[s] - pl) + abs(p2[s] - pl), abs(p1[s] - pr) + abs(p2[s] - pr)) + 1;	
	    			}
	    		}
	    		ans = min(ans, cur);
	    	}
	    	cout << ans + val;
	    }
	}
}

Compilation message (stderr)

bridge.cpp:3: warning: ignoring '#pragma optimize ' [-Wunknown-pragmas]
    3 | #pragma optimize ("g",on)
      | 
bridge.cpp:36:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   36 | main() {
      | ^~~~
bridge.cpp: In function 'int main()':
bridge.cpp:88:25: 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]
   88 |       for (int i = 0; i < sz(s); i++) {
      |                         ^
bridge.cpp:100:14: 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]
  100 |        if (i < sz(s) - 1) {
      |            ~~^~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 14 / 14
• Subtask 3: 0 / 9
• Subtask 4: 0 / 32
• Subtask 5: 0 / 37