Submission #1068327

#	Time	Username	Problem	Language	Result	Execution time	Memory
1068327		glupan	Naval battle (CEOI24_battle)	C++14	6 / 100	3056 ms	790120 KiB

Main

#include <bits/stdc++.h>
#define div /
#define ll long long

#define fore(i, l, r) for(int i=int(l); i<int(r); i++)
#define sz(a) int((a).size())

using namespace std;

const int INF = 1e9;
const int MX = 5e5 + 23;
const int MOD = 1000000007;
const int MAX_N = 5e5+23;
const int N = 1e6;

int sudar(int x1, int y1, char d1, int x2, int y2, char d2) {
    if(d1 == d2)
        return 0;
    if(d1 == 'E' and d2 == 'N' or d1 == 'S' and d2 == 'N' or d1 == 'S' and d2 == 'E' or d1 == 'W') {
        swap(d1,d2);
        swap(x1,x2);
        swap(y1,y2);
    }
    if(d1 == 'N') {
        if(d2 == 'S') {
            if(x1 != x2 or y1 < y2) return 0;
            return (y1-y2)/2;
        } else if(d2 == 'E') {
            if(y2 > y1 or x2 > x1 or (y1-y2) != (x1-x2)) return 0;
            return (x1-x2);
        } else if(d2 == 'W') {
            if(y2 > y1 or x2 < x1 or (y1-y2) != (x2-x1)) return 0;
            return (x2-x1);
        }
    } else if(d1 == 'E') {
        if(d2 == 'W') {
            if(y1 != y2 or x1 > x2) return 0;
            return (x2-x1)/2;
        } else if(d2 == 'S') {
            if(y2 > y1 or x2 < x1 or (y1-y2) != (x2-x1)) return 0;
            return (x2-x1);
        }
    } else if(d1 == 'S') {
        if(d2 == 'W') {
            if(y1 > y2 or x1 > x2 or (y2-y1) != (x2-x1)) return 0;
            return (x2-x1);
        }
    }
}

void solve() {
    int n; cin >> n;
    int x[n], y[n];
    char d[n];
    fore(i,0,n)
        cin >> x[i] >> y[i] >> d[i];
    priority_queue<pair<int,pair<int,int>>>pq;
    fore(i,0,n) {
        fore(j,0,n) {
            if(sudar(x[i],y[i],d[i],x[j],y[j],d[j]))
                pq.push({sudar(x[i],y[i],d[i],x[j],y[j],d[j]),{i,j}});
        }
    }
    int destroyed[n+5];
    memset(destroyed,0,sizeof destroyed);
    while(!pq.empty()) {
        pair<int,pair<int,int>> explosion = pq.top();
        pq.pop();
        if(destroyed[explosion.second.first] == 0 and destroyed[explosion.second.second] == 0 or destroyed[explosion.second.first] == explosion.first or destroyed[explosion.second.second] == explosion.first) {
            destroyed[explosion.second.first] = explosion.first;
            destroyed[explosion.second.second] = explosion.first;
        }
    }
    fore(i,0,n)
        if(!destroyed[i])
            cout << i+1 << endl;
}

int main() {
    ios::sync_with_stdio(false);

    int t=1;
    while(t--) solve();
}

Compilation message (stderr)

Main.cpp: In function 'int sudar(int, int, char, int, int, char)':
Main.cpp:19:18: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   19 |     if(d1 == 'E' and d2 == 'N' or d1 == 'S' and d2 == 'N' or d1 == 'S' and d2 == 'E' or d1 == 'W') {
      |        ~~~~~~~~~~^~~~~~~~~~~~~
Main.cpp:19:72: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   19 |     if(d1 == 'E' and d2 == 'N' or d1 == 'S' and d2 == 'N' or d1 == 'S' and d2 == 'E' or d1 == 'W') {
      |                                                              ~~~~~~~~~~^~~~~~~~~~~~~
Main.cpp: In function 'void solve()':
Main.cpp:69:51: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   69 |         if(destroyed[explosion.second.first] == 0 and destroyed[explosion.second.second] == 0 or destroyed[explosion.second.first] == explosion.first or destroyed[explosion.second.second] == explosion.first) {
      |            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp: In function 'int sudar(int, int, char, int, int, char)':
Main.cpp:49:1: warning: control reaches end of non-void function [-Wreturn-type]
   49 | }
      | ^

• Subtask 0: 0 / 0
• Subtask 1: 6 / 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