제출 #104365

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
104365		ihdignite	웜뱃 (IOI13_wombats)	C++14	12 / 100	76 ms	16120 KiB

wombats

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

const int r=5e1, c=20, bs=10, bc=r/bs, sts=1024;
int h[r][c-1], v[r][c], st[sts][c][c];

void solve(int a[c], int (*b)[c], int d[c], int l1=0, int r1=c-1, int l2=0, int r2=c-1) {
	//cout << "s " << l1 << " " << r1 << " " << l2 << " " << r2 << endl;
	if(l1>r1)
		return;
	int m1=(l1+r1)/2, m2=r2;
	for(int i=l2; i<=r2; ++i) {
		if(a[i]+b[i][m1]<=d[m1]) {
			d[m1]=a[i]+b[i][m1];
			m2=i;
		}
	}
	//if(l1==0&&r1==c-1)
	//cout << "sr " << m1 << " " << m2 << endl;
	solve(a, b, d, l1, m1-1, l2, m2);
	solve(a, b, d, m1+1, r1, m2, r2);
}

void p(int i) {
	//cout << "p " << i << endl;
	//for(int j=0; j<5; ++j)
		//for(int k=0; k<5; ++k)
			//cout << st[i][j][k] << " \n"[k==5-1];
}

void cs(int i, int l2, int r2) {
	memset(st[i], 0x3f, sizeof(st[i]));
	for(int j=0; j<c; ++j) {
		st[i][j][j]=0;
		for(int k=l2*bs; k<(l2+1)*bs; ++k) {
			for(int l=1; l<c; ++l)
				st[i][j][l]=min(st[i][j][l-1]+h[k][l-1], st[i][j][l]);
			for(int l=c-1; l; --l)
				st[i][j][l-1]=min(st[i][j][l]+h[k][l-1], st[i][j][l-1]);
			for(int l=0; l<c; ++l)
				st[i][j][l]+=v[k][l];
		}
	}
	p(i);
}

void cmb(int i) {
	//cout << "cmb " << i << " " << 2*i << " " << 2*i+1 << endl;
	memset(st[i], 0x3f, sizeof(st[i]));
	for(int j=0; j<c; ++j)
		solve(st[2*i][j], st[2*i+1], st[i][j]);
	p(i);
}

//just do upd(0, bc-1)
void bld(int i=1, int l2=0, int r2=bc-1) {
	if(l2==r2) {
		cs(i, l2, r2);
		return;
	}
	int m2=(l2+r2)/2;
	bld(2*i, l2, m2);
	bld(2*i+1, m2+1, r2);
	cmb(i);
}

void upd(int l1, int i=1, int l2=0, int r2=bc-1) {
	//cout << "u " << l1 << " " << i << " " << l2 << " " << r2 << endl;
	//cout << h[0][1];
	if(l2==r2) {
		cs(i, l2, r2);
		return;
	}
	int m2=(l2+r2)/2;
	if(l1<=m2)
		upd(l1, 2*i, l2, m2);
	else
		upd(l1, 2*i+1, m2+1, r2);
	cmb(i);
}

void init(int r, int c, int h[5000][200], int v[5000][200]) {
	memset(::h, 0x3f, sizeof(::h));
	for(int i=0; i<r; ++i)
		for(int j=0; j<c-1; ++j)
			::h[i][j]=h[i][j];
	for(int i=0; i<r-1; ++i)
		for(int j=0; j<c; ++j)
			::v[i][j]=v[i][j];
	bld();
}

void changeH(int p, int q, int w) {
	h[p][q]=w;
	upd(p/bs);
}

void changeV(int p, int q, int w) {
	v[p][q]=w;
	upd(p/bs);
}

int escape(int a, int b) {
	return st[1][a][b];
}

컴파일 시 표준 에러 (stderr) 메시지

grader.c: In function 'int main()':
grader.c:15:6: warning: variable 'res' set but not used [-Wunused-but-set-variable]
  int res;
      ^~~
wombats.cpp: In function 'void cs(int, int, int)':
wombats.cpp:106:1: warning: assuming signed overflow does not occur when assuming that (X + c) >= X is always true [-Wstrict-overflow]
 }
 ^
wombats.cpp:106:1: warning: assuming signed overflow does not occur when assuming that (X + c) >= X is always true [-Wstrict-overflow]
wombats.cpp:106:1: warning: assuming signed overflow does not occur when assuming that (X + c) >= X is always true [-Wstrict-overflow]
wombats.cpp:32:6: warning: assuming signed overflow does not occur when assuming that (X + c) >= X is always true [-Wstrict-overflow]
 void cs(int i, int l2, int r2) {
      ^~
wombats.cpp:32:6: warning: assuming signed overflow does not occur when assuming that (X + c) >= X is always true [-Wstrict-overflow]
wombats.cpp:32:6: warning: assuming signed overflow does not occur when assuming that (X + c) >= X is always true [-Wstrict-overflow]

• Subtask 1: 0 / 9
• Subtask 2: 12 / 12
• Subtask 3: 0 / 16
• Subtask 4: 0 / 18
• Subtask 5: 0 / 21
• Subtask 6: 0 / 24