Submission #307577

#	Time	Username	Problem	Language	Result	Execution time	Memory
307577		cheetose	Carnival Tickets (IOI20_tickets)	C++17	27 / 100	758 ms	56056 KiB

tickets

#include <bits/stdc++.h>
#define mp make_pair
#define pb push_back
#define X first
#define Y second
#define y0 y12
#define y1 y22
#define INF 987654321987654321
#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<db> 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 int 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; }
int dx[] = { 0,1,0,-1,1,1,-1,-1 }, dy[] = { 1,0,-1,0,1,-1,1,-1 };
int ddx[] = { -1,-2,1,-2,2,-1,2,1 }, ddy[] = { -2,-1,-2,1,-1,2,1,2 };
#include "tickets.h"
int n,m;
Pi p[1500];
ll d[751][751];
ll go(int i,int j,vector<Vi> &x){
	if(i==n/2 && j==n/2)return 0;
	ll &ret=d[i][j];
	if(ret!=-INF-5)return ret;
	ret=-INF;
	int N=i+j;
	if(i<n/2)ret=max(ret,-x[N][p[N].X]+go(i+1,j,x));
	if(j<n/2)ret=max(ret,x[N][p[N].Y]+go(i,j+1,x));
	return ret;
}
void track(int i,int j,int k,vector<Vi> &x, vector<Vi> &s){
	if(i==n/2 && j==n/2)return;
	int N=i+j;
	if(i<n/2 && -x[N][p[N].X]+go(i+1,j,x)==go(i,j,x)){
		s[N][p[N].X++]=k;
		track(i+1,j,k,x,s);
		return;
	}
	if(j<n/2 && x[N][p[N].Y]+go(i,j+1,x)==go(i,j,x)){
		s[N][p[N].Y--]=k;
		track(i,j+1,k,x,s);
		return;
	}
}
/*void allocate_tickets(vector<Vi> &s){
	int n=s.size(),m=s[0].size();
	fup(i,0,n-1,1){
		fup(j,0,m-1,1){
			printf("%d ",s[i][j]);
		}
		puts("");
	}
}*/
ll find_maximum(int k, vector<Vi> x){
	n=x.size(),m=x[0].size();
	vector<Vi> s(n,Vi(m,-1));
	fup(i,0,n-1,1)p[i].Y=m-1;
	ll res=0;
	fup(ii,0,k-1,1){
		fup(i,0,n/2,1)fup(j,0,n/2,1)d[i][j]=-INF-5;
		res+=go(0,0,x);
		track(0,0,ii,x,s);
	}
	allocate_tickets(s);
	return res;
}/*
int main() {
	int n,m,k;
	scanf("%d%d%d",&n,&m,&k);
	vector<Vi> x(n,Vi(m));
	fup(i,0,n-1,1)fup(j,0,m-1,1)scanf("%d",&x[i][j]);
	printf("%lld\n",find_maximum(k,x));
}*/

Compilation message (stderr)

tickets.cpp: In function 'll find_maximum(int, std::vector<std::vector<int> >)':
tickets.cpp:10:30: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
      |                              ^
tickets.cpp:81:2: note: in expansion of macro 'fup'
   81 |  fup(i,0,n-1,1)p[i].Y=m-1;
      |  ^~~
tickets.cpp:10:30: warning: unnecessary parentheses in declaration of 'ii' [-Wparentheses]
   10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
      |                              ^
tickets.cpp:83:2: note: in expansion of macro 'fup'
   83 |  fup(ii,0,k-1,1){
      |  ^~~
tickets.cpp:10:30: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
      |                              ^
tickets.cpp:84:3: note: in expansion of macro 'fup'
   84 |   fup(i,0,n/2,1)fup(j,0,n/2,1)d[i][j]=-INF-5;
      |   ^~~
tickets.cpp:10:30: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
      |                              ^
tickets.cpp:84:17: note: in expansion of macro 'fup'
   84 |   fup(i,0,n/2,1)fup(j,0,n/2,1)d[i][j]=-INF-5;
      |                 ^~~

• Subtask 1: 11 / 11
• Subtask 2: 16 / 16
• Subtask 3: 0 / 14
• Subtask 4: 0 / 14
• Subtask 5: 0 / 12
• Subtask 6: 0 / 23
• Subtask 7: 0 / 10