Submission #144520

#	Time	Username	Problem	Language	Result	Execution time	Memory
144520		cheetose	Travelling Merchant (APIO17_merchant)	C++11	100 / 100	110 ms	4216 KiB

merchant

#include<cstdio>
#include<cstdlib>
#include<iostream>
#include<vector>
#include<queue>
#include<bitset>
#include<string>
#include<stack>
#include<set>
#include<unordered_set>
#include<map>
#include<unordered_map>
#include<cstring>
#include<complex>
#include<cmath>
#include<iomanip>
#include<numeric>
#include<algorithm>
#include<list>
#include<functional>
#include<cassert>
#define mp make_pair
#define pb push_back
#define X first
#define Y second
#define y0 y12
#define y1 y22
#define INF 9876543219876543
#define PI 3.141592653589793238462643383279502884
#define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
#define fdn(i,a,b,c) for(int (i)=(a);(i)>=(b);(i)-=(c))
#define MEM0(a) memset((a),0,sizeof(a));
#define MEM_1(a) memset((a),-1,sizeof(a));
#define ALL(a) a.begin(),a.end()
#define SYNC ios_base::sync_with_stdio(false);cin.tie(0)
using namespace std;
typedef long long ll;
typedef long double ld;
typedef double db;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef pair<int, int> Pi;
typedef pair<ll, ll> Pll;
typedef pair<ld, ld> Pd;
typedef vector<int> Vi;
typedef vector<ll> Vll;
typedef vector<double> Vd;
typedef vector<Pi> VPi;
typedef vector<Pll> VPll;
typedef vector<Pd> VPd;
typedef tuple<int, int, int> iii;
typedef tuple<int,int,int,int> iiii;
typedef tuple<ll, ll, ll> LLL;
typedef vector<iii> Viii;
typedef vector<LLL> VLLL;
typedef complex<double> base;
const ll MOD = 1000000007;
ll POW(ll a, ll b, ll MMM = MOD) {ll ret=1; for(;b;b>>=1,a=(a*a)%MMM)if(b&1)ret=(ret*a)% MMM; return ret; }
ll gcd(ll a, ll b) { return b ? gcd(b, a%b) : a; }
ll lcm(ll a, ll b) { if (a == 0 || b == 0)return a + b; return a*(b / gcd(a, b)); }
int dx[] = { 0,1,0,-1,1,1,-1,-1 }, dy[] = { 1,0,-1,0,1,-1,1,-1 };

int n,m,k;
ll b[101][1001],s[101][1001],d[101][101],pro[101][101],t[101][101];
bool ok(ll kk)
{
	fup(i,1,n,1)fup(j,1,n,1)
	{
		if(d[i][j]==INF)t[i][j]=-INF;
		else t[i][j]=pro[i][j]-d[i][j]*kk;
	}
	fup(i,1,n,1)t[i][i]=-INF;
	fup(K,1,n,1)fup(i,1,n,1)fup(j,1,n,1)t[i][j]=max(t[i][j],t[i][K]+t[K][j]);
	fup(i,1,n,1)if(t[i][i]>=0)return 1;
	return 0;
}
int main() {
	scanf("%d%d%d",&n,&m,&k);
	fup(i,1,n,1)fup(j,1,k,1)scanf("%lld%lld",&b[i][j],&s[i][j]);
	fup(i,1,n,1)fup(j,1,n,1)if(i!=j)d[i][j]=INF;
	fup(i,1,m,1)
	{
		int x,y,z;
		scanf("%d%d%d",&x,&y,&z);
		d[x][y]=z;
	}
	fup(kk,1,n,1)fup(i,1,n,1)fup(j,1,n,1)
		d[i][j]=min(d[i][j],d[i][kk]+d[kk][j]);
	fup(i,1,n,1)fup(j,1,n,1)fup(kk,1,k,1)
		if(~b[i][kk] && ~s[j][kk])pro[i][j]=max(pro[i][j],s[j][kk]-b[i][kk]);
	ll l=1,r=1e9+5;
	while(l<=r)
	{
		ll kk=(l+r)>>1;
		if(ok(kk))l=kk+1;
		else r=kk-1;
	}
	printf("%lld",r);
}

Compilation message (stderr)

merchant.cpp: In function 'int main()':
merchant.cpp:78:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d",&n,&m,&k);
  ~~~~~^~~~~~~~~~~~~~~~~~~
merchant.cpp:79:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  fup(i,1,n,1)fup(j,1,k,1)scanf("%lld%lld",&b[i][j],&s[i][j]);
                          ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
merchant.cpp:84:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d",&x,&y,&z);
   ~~~~~^~~~~~~~~~~~~~~~~~~

• Subtask 1: 12 / 12
• Subtask 2: 21 / 21
• Subtask 3: 33 / 33
• Subtask 4: 34 / 34