Submission #232202

#	Time	Username	Problem	Language	Result	Execution time	Memory
232202		errorgorn	Wombats (IOI13_wombats)	C++14	28 / 100	4074 ms	32640 KiB

wombats

#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,fma,tune=native")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")

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

const int INF=1e9;

int r,c;
static int h[5005][205];
static int v[5005][205];

static int data[1005][105][105];

static int pre[205]; //save space ig
void build(int u,int pos){
	for (int x=1;x<c;x++){
		pre[x]=pre[x-1]+h[pos][x-1];
	}
	
	for (int x=0;x<c;x++){
		for (int y=0;y<c;y++){
			data[u][x][y]=pre[max(x,y)]-pre[min(x,y)]+v[pos][y];
		}
	}
}

void merge(int u){
	int l=u<<1,r=u<<1|1;
	
	for (int x=0;x<c;x++){
		for (int y=0;y<c;y++){
			data[u][x][y]=INF;
			for (int z=0;z<c;z++){
				data[u][x][y]=min(data[u][x][y],data[l][x][z]+data[r][z][y]);
			}
		}
	}
}

void init(int u,int s,int e){
	if (s==e){
		build(u,s);
	}
	else{
		int m=s+e>>1;
		init(u<<1,s,m);
		init(u<<1|1,m+1,e);
		
		merge(u);
	}
}

void update(int u,int i,int s,int e){
	if (s==e){
		build(u,s);
	}
	else{
		int m=s+e>>1;
		
		if (i<=m) update(u<<1,i,s,m);
		else update(u<<1|1,i,m+1,e);
		
		merge(u);
	}
}

void init(int R, int C, int H[5000][200], int V[5000][200]) {
	r=R,c=C;
	
    for (int x=0;x<r;x++){
		for (int y=0;y<c-1;y++){
			h[x][y]=H[x][y];
		}
	}
	
	for (int x=0;x<r-1;x++){
		for (int y=0;y<c;y++){
			v[x][y]=V[x][y];
		}
	}
	
	init(1,0,r-1);
}

void changeH(int P, int Q, int W) {
    h[P][Q]=W;
    update(1,P,0,r-1);
}

void changeV(int P, int Q, int W) {
    v[P][Q]=W;
    update(1,P,0,r-1);
}

int escape(int c1, int c2) {
    return data[1][c1][c2];
}

Compilation message (stderr)

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 init(int, int, int)':
wombats.cpp:48:10: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int m=s+e>>1;
         ~^~
wombats.cpp: In function 'void update(int, int, int, int)':
wombats.cpp:61:10: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int m=s+e>>1;
         ~^~

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