Submission #1044487

#	Time	Username	Problem	Language	Result	Execution time	Memory
1044487		dilanyan	Naval battle (CEOI24_battle)	C++17	0 / 100	130 ms	23632 KiB

Main

//-------------dilanyan------------\\ 
 
#define _CRT_SECURE_NO_WARNINGS
#include<bits/stdc++.h>
#include<stdio.h>
using namespace std;
 
//------------------Kargpefines--------------------\\ 
 
#define ll long long
#define pb push_back
#define all(u) (u).begin(), (u).end()
#define pqueue priority_queue
#define upper upper_bound
#define lower lower_bound
#define umap unordered_map
#define uset unordered_set

void KarginSet(string name = "") {
    ios_base::sync_with_stdio(false); cin.tie(NULL);
    if (name.size()) {
        freopen((name + ".in").c_str(), "r", stdin);
        freopen((name + ".out").c_str(), "w", stdout);
    }
}
 
//-------------------KarginConstants------------------\\ 
 
const ll mod = 1e9 + 7;
const ll inf = 2e9;
 
//-------------------KarginCode-----------------------\\ 
 
const int N = 200005, M = 1000005;

struct node {
    int x, y, ind;
    char d;
};

node a[N];

int hatvumen(node x, node y) {
    if (x.x == y.x) {
        if (x.y > y.y) swap(x, y);
        if (x.d == 'S' && y.d == 'N') return (y.y - x.y) / 2;
        return -1;
    }
    if (x.y == y.y) {
        if (x.x > y.x) swap(x, y);
        if (x.d == 'E' && y.d == 'W') return (y.x - x.x) / 2;
        return -1;
    }
    if (x.x > y.x) swap(x, y);
    if (abs(x.x - y.x) != abs(x.y - y.y)) return -1;
    if (x.y > y.y) {
        if (x.d == 'N' && y.d == 'W') return (y.x - x.x);
        if (x.d == 'E' && y.d == 'S') return (y.x - x.x);
        return -1;
    }
    else {
        if (x.d == 'S' && y.d == 'W') return (y.x - x.x);
        if (x.d == 'E' && y.d == 'N') return (y.x - x.x);
        return -1;
    }
}

bool cmp(node x, node y) {
    if (x.x == y.x) return x.y < y.y;
    return x.x < y.x;
}

void KarginSolve() {
    int n; cin >> n;
    vector<pair<int,vector<int>>> s, e;
    for (int i = 1;i <= n;i++) {
        cin >> a[i].x >> a[i].y >> a[i].d;
        a[i].ind = i;
    }
    sort(a + 1, a + n, cmp);
    map<int, vector<int>> mp;
    for (int i = 1;i <= n;i++) {
        if (a[i].d == 'S') {
            mp[a[i].x + a[i].y].pb(a[i].ind);
        }
    }
    for (auto it : mp) {
        reverse(all(mp[it.first]));
    }
    vector<bool> ok(n + 1, true);
    for (int i = 1;i <= n;i++) {
        if (a[i].d == 'E') {
            if (!mp[a[i].x + a[i].y].empty()) {
                ok[a[i].ind] = false, ok[mp[a[i].x + a[i].y].back()] = false;
                mp[a[i].x + a[i].y].pop_back();
            }
        }
    }
    for (int i = 1;i <= n;i++) {
        if (ok[i]) cout << i << '\n';
    }
}

int main() {
    KarginSet();
    int test = 1;
    //cin >> test;
    while (test--) {
        KarginSolve();
    }
    return 0;
} 

Compilation message (stderr)

Main.cpp:1:1: warning: multi-line comment [-Wcomment]
    1 | //-------------dilanyan------------\\
      | ^
Main.cpp:8:1: warning: multi-line comment [-Wcomment]
    8 | //------------------Kargpefines--------------------\\
      | ^
Main.cpp:27:1: warning: multi-line comment [-Wcomment]
   27 | //-------------------KarginConstants------------------\\
      | ^
Main.cpp:32:1: warning: multi-line comment [-Wcomment]
   32 | //-------------------KarginCode-----------------------\\
      | ^
Main.cpp: In function 'void KarginSet(std::string)':
Main.cpp:22:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |         freopen((name + ".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:23:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |         freopen((name + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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