This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "wombats.h"
#include "bits/stdc++.h"
#define MAXN 100009
#define INF 1000000007
#define mp(x,y) make_pair(x,y)
#define all(v) v.begin(),v.end()
#define pb(x) push_back(x)
#define wr cout<<"----------------"<<endl;
#define ppb() pop_back()
#define tr(ii,c) for(__typeof((c).begin()) ii=(c).begin();ii!=(c).end();ii++)
#define ff first
#define ss second
#define my_little_dodge 46
#define debug(x) cerr<< #x <<" = "<< x<<endl;
using namespace std;
typedef long long ll;
typedef pair<int,int> PII;
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
const int R=5005,C=202;
int h[R][C],v[R][C],n,m;
struct node{
vector<vector<int> >dp;
void init(){
dp.resize(m);
for(int i=0;i<m;i++)
dp[i].resize(m);
}
void fill(){
init();
for(int i=0;i<m;i++)
for(int j=0;j<m;j++)
dp[i][j]=INF;
}
void print(){
for(int i=0;i<m;i++){
for(int j=0;j<m;j++)
printf("%d ",dp[i][j]);
puts("");
}
}
}seg[R<<2];
node merge(node x,node y,int mid){
node z;z.fill();
for(int i=0;i<m;i++)
for(int j=0;j<m;j++)
for(int k=0;k<m;k++)
umin(z.dp[i][k],x.dp[i][j]+v[mid][j]+y.dp[j][k]);
return z;
}
const int L=5;
int odp[L][C];
void naive(int nd,int x,int y){
queue<PII>q;int nx,ny,id;
for(int i=0;i<m;i++){
memset(odp,127,sizeof odp);
q.push(mp(x,i));odp[0][i]=0;
while(!q.empty()){
nx=q.front().ff;ny=q.front().ss;q.pop();id=nx-x;
if(ny>0 and umin(odp[id][ny-1],odp[id][ny]+h[nx][ny-1]))
q.push(mp(nx,ny-1));
if(ny+1<m and umin(odp[id][ny+1],odp[id][ny]+h[nx][ny]))
q.push(mp(nx,ny+1));
if(nx<y and umin(odp[id+1][ny],odp[id][ny]+v[nx][ny]))
q.push(mp(nx+1,ny));
}
for(int j=0;j<m;j++)
seg[nd].dp[i][j]=odp[y-x][j];
}
}
void build(int nd,int x,int y){
seg[nd].init();
if(y-x<L){
naive(nd,x,y);
return;
}
int mid=(x+y)>>1;
build(nd<<1,x,mid);
build(nd<<1|1,mid+1,y);
seg[nd]=merge(seg[nd<<1],seg[nd<<1|1],mid);
}
void upd(int p,int nd,int x,int y){
if(y-x<L){
naive(nd,x,y);
return;
}
int mid=(x+y)>>1;
if(p<=mid)upd(p,nd<<1,x,mid);
else upd(p,nd<<1|1,mid+1,y);
seg[nd]=merge(seg[nd<<1],seg[nd<<1|1],mid);
}
void init(int R, int C, int H[5000][200], int V[5000][200]) {
n=R;m=C;
for(int i=0;i<n;i++)
for(int j=0;j<m-1;j++)
h[i][j]=H[i][j];
for(int i=0;i<n-1;i++)
for(int j=0;j<m;j++)
v[i][j]=V[i][j];
build(1,0,n-1);
}
void changeH(int P, int Q, int W) {
h[P][Q]=W;upd(P,1,0,n-1);
}
void changeV(int P, int Q, int W) {
v[P][Q]=W;upd(P,1,0,n-1);
}
int escape(int V1, int V2) {
return seg[1].dp[V1][V2];
}
Compilation message (stderr)
grader.c: In function 'int main()':
grader.c:15:6: warning: variable 'res' set but not used [-Wunused-but-set-variable]
15 | int res;
| ^~~
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