제출 #299384

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
299384		AmineWeslati	Toll (BOI17_toll)	C++14	39 / 100	3073 ms	4732 KiB

toll

//Never stop trying
#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
#include <bits/stdc++.h>
using namespace std;
#define boost ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)
//#define int long long
typedef string str;
typedef long long ll;
typedef double db;
typedef long double ld;
typedef pair<int, int> pi;
#define fi first
#define se second
typedef vector<int> vi;
typedef vector<pi> vpi;
typedef vector<str> vs;
typedef vector<ld> vd;
#define pb push_back
#define sz(x) (int)x.size()
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
#define endl "\n"

#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)
#define R0F(i,a) ROF(i,0,a)

const int MOD = 1e9 + 7; //998244353
const ll INF = 2e9;
const int MX = 5e4 + 10;
const int nx[4] = {0, 0, 1, -1}, ny[4] = {1, -1, 0, 0}; //right left down up

template<class T> using V = vector<T>;
template<class T> bool ckmin(T& a, const T& b) { return a > b ? a = b, 1 : 0; }
template<class T> bool ckmax(T& a, const T& b) { return a < b ? a = b, 1 : 0; }

ll cdiv(ll a, ll b) { return a / b + ((a ^ b) > 0 && a % b); } // divide a by b rounded up
constexpr int log2(int x) { return 31 - __builtin_clz(x); } // floor(log2(x))

#define dbg(x) cerr << " - " << #x << " : " << x << endl;
#define dbgs(x,y) cerr << " - " << #x << " : " << x << " / " << #y << " : " << y << endl;
#define dbgv(v) cerr << " - " << #v << " : " << endl << "[ "; for(auto it : v) cerr << it << ' '; cerr << ']' << endl;

void IO() {
#ifndef ONLINE_JUDGE
	freopen("input.txt", "r", stdin);
	freopen("output.txt", "w", stdout);
#endif
}

inline int read(){
   int x=0; bool s=1; char c=getchar();
   while(c<'0'||c>'9'){ if(c=='-') s=0; c=getchar();}
   while(c>='0' && c<='9'){ x=(x<<3)+(x<<1)+c-'0'; c=getchar();}
   return s? x: -x;}


int K,N,M,Q;
vpi adj[MX];

int memo[MX];
int D;

/*int solve(int u){
	if(u==D) return 0;
	if(memo[u]!=-1) return memo[u];
	int ans=INF;
	for(auto v: adj[u]) ans=min(ans,solve(v.fi)+v.se);
	return memo[u]=ans;
}*/


int main() {
	boost; 

	K=read(); N=read(); M=read(); Q=read();
	FOR(i,0,M){
		int u,v,w; 
		u=read(); v=read(); w=read();
		adj[u].pb({v,w});
	}
	int dist[N]; //FOR(i,0,N) dist[i]=INF;
	while(Q--){
		int a,b; 
		a=read(); b=read();
		FOR(i,a,b+1) dist[i]=INF;
		vi re;
		dist[a]=0; //re.pb(a);
		for(int i=a; i<b+1; i++) if(dist[i]!=INF){
			for(auto v: adj[i]) if(v.fi<=b && ckmin(dist[v.fi],dist[i]+v.se));
		}

		int ans=dist[b];	
		if(ans==INF) cout << -1 << endl;
		else cout << ans << endl;

		//for(auto x: re) dist[x]=INF;
	}




	return 0;
}

/* Careful!!!
	.Array bounds
	.Infinite loops
	.Uninitialized variables / empty containers
	.Order of input

   Some insights:
	.Binary search
	.Graph representation
	.Write brute force code
	.Change your approach
*/

컴파일 시 표준 에러 (stderr) 메시지

toll.cpp:3: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
    3 | #pragma GCC optimization ("O3")
      | 
toll.cpp:4: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
    4 | #pragma GCC optimization ("unroll-loops")
      | 
toll.cpp: In function 'void IO()':
toll.cpp:49:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   49 |  freopen("input.txt", "r", stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
toll.cpp:50:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   50 |  freopen("output.txt", "w", stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 7
• Subtask 2: 0 / 10
• Subtask 3: 8 / 8
• Subtask 4: 31 / 31
• Subtask 5: 0 / 44