Submission #1068857

#	Time	Username	Problem	Language	Result	Execution time	Memory
1068857		naneosmic	Naval battle (CEOI24_battle)	C++14	0 / 100	3052 ms	4956 KiB

Main

#include <bits/stdc++.h>
#define int long long
#define endl "\n"
using namespace std;
void solve(){
    int n;
    cin>>n;
    vector<pair<pair<int,int>,int>>v(n);
    vector<bool>gone(n,false);
    for(int i=0;i<n;i++){
        int x,y;char c;
        cin>>x>>y>>c;
        int num;
        if(c=='N'){
            num=0;
        }else if(c=='S'){
            num=1;
        }else if(c=='E'){
            num=2;
        }else if(c=='W'){
            num=3;
        }
        v[i]=make_pair(make_pair(x,y),num);
    }
    set<pair<int,pair<int,int>>>collisions;
    for(int i=0;i<n;i++){
        pair<pair<int,int>,int>cur=v[i];
        int num1=cur.second;
        for(int j=0;j<n;j++){
            pair<pair<int,int>,int>novi=v[j];
            int num2=novi.second;
            if(num1==0&&num2==1){
                if(cur.first.first==novi.first.first){
                    collisions.insert(make_pair((cur.first.second-novi.first.second)/2,make_pair(i,j)));
                }
            }else if(num1==0&&num2==2){
                if(cur.first.first+novi.first.second==cur.first.second+novi.first.first){
                    collisions.insert(make_pair(cur.first.second-novi.first.second,make_pair(i,j)));
                }
            }else if(num1==0&&num2==3){
                if(cur.first.first+novi.first.first==cur.first.second+novi.first.second){
                    collisions.insert(make_pair(cur.first.second-novi.first.second,make_pair(i,j)));
                }
            }else if(num1==1&&num2==0){
                if(cur.first.first==novi.first.first){
                    collisions.insert(make_pair((novi.first.second-cur.first.second)/2,make_pair(i,j)));
                }
            }else if(num1==1&&num2==2){
                if(cur.first.first+novi.first.first==cur.first.second+novi.first.second){
                    collisions.insert(make_pair(novi.first.second-cur.first.second,make_pair(i,j)));
                }
            }else if(num1==1&&num2==3){
                if(cur.first.first+novi.first.second==cur.first.second+novi.first.first){
                    collisions.insert(make_pair(novi.first.second-cur.first.second,make_pair(i,j)));
                }
            }else if(num1==2&&num2==0){
                if(cur.first.first+novi.first.second==cur.first.second+novi.first.first){
                    collisions.insert(make_pair(novi.first.second-cur.first.second,make_pair(i,j)));
                }
            }else if(num1==2&&num2==1){
                if(cur.first.first+novi.first.first==cur.first.second+novi.first.second){
                    collisions.insert(make_pair(cur.first.second-novi.first.second,make_pair(i,j)));
                }
            }else if(num1==2&&num2==3){
                if(cur.first.second==novi.first.second){
                    collisions.insert(make_pair((novi.first.first-cur.first.first)/2,make_pair(i,j)));
                }
            }else if(num1==3&&num2==0){
                if(cur.first.first+novi.first.first==cur.first.second+novi.first.second){
                    collisions.insert(make_pair(novi.first.second-cur.first.second,make_pair(i,j)));
                }
            }else if(num1==3&&num2==1){
                if(cur.first.first+novi.first.second==cur.first.second+novi.first.first){
                    collisions.insert(make_pair(cur.first.second-novi.first.second,make_pair(i,j)));
                }else if(num1==3&&num2==2){
                    if(cur.first.second==novi.first.second){
                        collisions.insert(make_pair((cur.first.first-novi.first.first)/2,make_pair(i,j)));
                    }
                }
            }
        }
    }
    auto it1=collisions.lower_bound(make_pair(0,make_pair(0,0)));
    vector<int>tobeerased;
    int val=-1;
    while(it1!=collisions.end()){
        if((!gone[(*it1).second.first])&&(!gone[(*it1).second.second])){
            if(val==-1){
                val=(*it1).first;
                tobeerased.push_back((*it1).second.first);
                tobeerased.push_back((*it1).second.second);
            }else if(val!=(*it1).first){
                for(int neznamvise=0;neznamvise<tobeerased.size();neznamvise++){
                    gone[tobeerased[neznamvise]]=true;
                }
                tobeerased.clear();
                val=(*it1).first;
                tobeerased.push_back((*it1).second.first);
                tobeerased.push_back((*it1).second.second);
            }else{
                tobeerased.push_back((*it1).second.first);
                tobeerased.push_back((*it1).second.second);
            }
        }
        it1++;
    }
    for(int neznamvise=0;neznamvise<tobeerased.size();neznamvise++){
        gone[tobeerased[neznamvise]]=true;
    }
    tobeerased.clear();
    for(int i=0;i<n;i++){
        if(!gone[i]){
            cout<<i+1<<" ";
        }
    }
    cout<<'\n';
}
signed main(){
    solve();
}

Compilation message (stderr)

Main.cpp: In function 'void solve()':
Main.cpp:93:48: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   93 |                 for(int neznamvise=0;neznamvise<tobeerased.size();neznamvise++){
      |                                      ~~~~~~~~~~^~~~~~~~~~~~~~~~~~
Main.cpp:107:36: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  107 |     for(int neznamvise=0;neznamvise<tobeerased.size();neznamvise++){
      |                          ~~~~~~~~~~^~~~~~~~~~~~~~~~~~

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