Submission #948315

#	Time	Username	Problem	Language	Result	Execution time	Memory
948315		vjudge1	Land of the Rainbow Gold (APIO17_rainbow)	C++17	0 / 100	11 ms	21084 KiB

rainbow

#include "rainbow.h"
#include <bits/stdc++.h>
#define ll int
#define str string
#define ins insert
#define ld long double
#define pb push_back
#define pf push_front
#define pof pop_front()
#define pob pop_back()
#define lb lower_bound
#define ub upper_bound
#define endl "\n"
#define fr first
#define sc second
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define sz size()
#define vll vector<ll>
#define arr array
#define pll vector<pair<ll,ll>>
using namespace std;
template<class S,class T>
bool chmin(S &a,const T &b) {
	return a>b?(a=b)==b:false;
}
template<class S,class T>
bool chmax(S &a,const T &b) {
	return a<b?(a=b)==b:false;
}
const ll inf=1e18;
const ll mod=1e9+7;
const ll N=2e5+5;
const ld eps=1e-9;
bool vis[55][N];
bool f[55][N];
ll l=inf,r,u=inf,d;
ll xd[4]={-1,1,0,0},yd[4]={0,0,-1,1};
bool ok(ll x,ll y){
    return !vis[x][y] && !f[x][y] && x>=u && x<=d && y>=l && y<=r;
}
void bfs(ll x,ll y){
    ll i;
    vis[x][y]=1;
    for(i=0;i<4;i++){
        ll nx=x+xd[i],ny=y+yd[i];
        if(ok(nx,ny))bfs(nx,ny);
    }
}
ll pref[4][N];
bool row;
void init(int r, int c, int sr, int sc, int m, char *s) {
    ll i,j;
    ll x=sr,y=sc;
    f[x][y]=1;
    for(i=0;i<m;i++){
        if(s[i]=='N')x--;
        if(s[i]=='S')x++;
        if(s[i]=='W')y--;
        if(s[i]=='E')y++;
        f[x][y]=1;
        chmin(u,x);
        chmax(d,x);
        chmin(l,y);
        chmax(r,y);
    }
    if(r==2) {
        row=1;
        for(i=1;i<3;i++){
            for(j=1;j<=r;j++){
                pref[i][j]=pref[i][j-1];
                if(f[i][j+1] && !f[i][j])pref[i][j]++;
            }
        }
    }
}

int colour(int ar, int ac, int br, int bc) {
    if(row){
        if(u==d){
            if(ac>=l && bc<=r && ar>=u && br<=d)return 0;
            if(ac<=l && bc>=r && ar>=u && br<=d)return 2;
            return 1;
        }
        ll c=0;
        if(ar==br){
            if(f[ar][bc+1] && !f[ar][bc])c=1;
            return pref[ar][bc]-pref[ar][ac-1]+c;
        }
        if(f[ar][bc+1] && !f[ar][bc])c++;
        if(f[br][bc+1] && !f[br][bc])c++;
        if(ac<l)c--;
        if(bc>r)c--;
        return pref[0][bc]-pref[0][ac-1]+pref[1][bc]-pref[1][ac-1]+c;
    }
    u=ar,l=ac,d=br,r=bc;
    ll c=0,i,j;
    for(i=u;i<=d;i++){
        for(j=l;j<=r;j++){
            vis[i][j]=0;
        }
    }
    for(i=u;i<=d;i++){
        for(j=l;j<=r;j++){
            if(vis[i][j] || f[i][j]) continue;
            bfs(i,j);
            c++;
        }
    }
    return c;
}

Compilation message (stderr)

rainbow.cpp:31:14: warning: overflow in conversion from 'double' to 'int' changes value from '1.0e+18' to '2147483647' [-Woverflow]
   31 | const ll inf=1e18;
      |              ^~~~

• Subtask 1: 0 / 11
• Subtask 2: 0 / 12
• Subtask 3: 0 / 24
• Subtask 4: 0 / 27
• Subtask 5: 0 / 26