Submission #1108789

#	Time	Username	Problem	Language	Result	Execution time	Memory
1108789		8pete8	Naval battle (CEOI24_battle)	C++17	37 / 100	3053 ms	4936 KiB

Main

#include<iostream>
#include<stack>
#include<map>
#include<vector>
#include<string>
#include<cassert>
#include<unordered_map>
#include <queue>
#include <cstdint>
#include<cstring>
#include<limits.h>
#include<cmath>
#include<set>
#include<algorithm>
#include <iomanip>
#include<numeric>
#include<bitset>
using namespace std;
#define ll long long
#define f first
#define s second
#define pii pair<int,int>
#define ppii pair<int,pii>
#define vi vector<int>
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define F(n) for(int i=0;i<n;i++)
#define lb lower_bound
#define ub upper_bound
#define fastio ios::sync_with_stdio(false);cin.tie(NULL);
#pragma GCC optimize ("03,unroll-lopps")
#define int long long
using namespace std;
const int mod=1e9+7,mxn=2e5+5,inf=1e18,minf=-1e18,lg=30;
//#undef int
int n,k,m;
void setIO(string name){		
	ios_base::sync_with_stdio(0); cin.tie(0);		
	freopen((name+".in").c_str(),"r",stdin);		
	freopen((name+".out").c_str(),"w",stdout);	
}
pii go[4]={{1,0},{0,1},{-1,0},{0,-1}};
int dead[mxn+10],direction[mxn+10];
pii v[mxn+10];
int collides(int x,int y){
    if(direction[x]==direction[y])return inf;
    if(direction[x]%2==direction[y]%2){
        if(direction[x]%2){
            if(v[x].f!=v[y].f)return inf;
            if(v[x].s>v[y].s)swap(x,y);
            if(direction[x]==1)return (v[y].s-v[x].s)/2;//going down (y+1)
            return inf;
        }
        else{
            if(v[x].s!=v[y].s)return inf;
            if(v[x].f>v[y].f)swap(x,y);
            if(direction[x]==0)return (v[y].f-v[x].f)/2;//going right (x+1)
            return inf;
        }
    }
    else{
        int diff=abs(v[x].f-v[y].f);
        pii nx={v[x].f+(diff*go[direction[x]].f),v[x].s+(diff*go[direction[x]].s)};
        pii ny={v[y].f+(diff*go[direction[y]].f),v[y].s+(diff*go[direction[y]].s)};
        if(nx==ny)return diff;
    }
    return inf;
}
int32_t main(){
    fastio
    cin>>n;
    for(int i=0;i<n;i++){
        cin>>v[i].f>>v[i].s;
        char a;cin>>a;
        if(a=='E')direction[i]=0;
        if(a=='W')direction[i]=2;
        if(a=='N')direction[i]=3;
        if(a=='S')direction[i]=1;
    }
    //find first collision?
    //brute force
    vector<int>crash,realcrash;
    int mn=inf;
    for(int k=0;k<n;k++){
        mn=inf;
        realcrash.clear();
        for(int i=0;i<n;i++){
            if(dead[i])continue;
            crash.clear();
            int curmn=inf;
            for(int j=0;j<n;j++){
                if(dead[j])continue;
                int x=collides(i,j);
                if(x<curmn){
                    crash.clear();
                    crash.pb(j);
                    curmn=x;
                }
                else if(x!=inf&&x==curmn)crash.pb(j);
            }
            if(crash.size())crash.pb(i);
            if(curmn<mn)swap(crash,realcrash),mn=curmn;
        }
        for(auto i:realcrash)dead[i]=1;
    }

    for(int i=0;i<n;i++)if(!dead[i])cout<<i+1<<'\n';
}
/*
*/

Compilation message (stderr)

Main.cpp:32:40: warning: bad option '-funroll-lopps' to pragma 'optimize' [-Wpragmas]
   32 | #pragma GCC optimize ("03,unroll-lopps")
      |                                        ^
Main.cpp:38:23: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   38 | void setIO(string name){
      |                       ^
Main.cpp:46:25: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   46 | int collides(int x,int y){
      |                         ^
Main.cpp:70:14: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   70 | int32_t main(){
      |              ^
Main.cpp: In function 'void setIO(std::string)':
Main.cpp:40:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |  freopen((name+".in").c_str(),"r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:41:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |  freopen((name+".out").c_str(),"w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 0: 0 / 0
• Subtask 1: 6 / 6
• Subtask 2: 12 / 12
• Subtask 3: 8 / 8
• Subtask 4: 11 / 11
• Subtask 5: 0 / 9
• Subtask 6: 0 / 30
• Subtask 7: 0 / 24