Submission #853911

#	Time	Username	Problem	Language	Result	Execution time	Memory
853911		maomao90	Robot Contest (IOI23_robot)	C++17	100 / 100	103 ms	6284 KiB

robot

// Hallelujah, praise the one who set me free
// Hallelujah, death has lost its grip on me
// You have broken every chain, There's salvation in your name
// Jesus Christ, my living hope
#include <bits/stdc++.h> 
#include "robot.h"
using namespace std;

#define REP(i, s, e) for (int i = (s); i < (e); i++)
#define RREP(i, s, e) for (int i = (s); i >= (e); i--)
template <class T>
inline bool mnto(T& a, T b) {return a > b ? a = b, 1 : 0;}
template <class T>
inline bool mxto(T& a, T b) {return a < b ? a = b, 1: 0;}

typedef unsigned long long ull;
typedef long long ll;
typedef long double ld;
#define FI first
#define SE second
typedef pair<int, int> ii;
typedef pair<ll, ll> pll;
typedef tuple<int, int, int> iii;
#define ALL(_a) _a.begin(), _a.end()
#define SZ(_a) (int) _a.size()
#define pb push_back
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<ii> vii;
typedef vector<iii> viii;

#ifndef DEBUG
#define cerr if (0) cerr
#endif

const int INF = 1000000005;
const ll LINF = 1000000000000000005ll;
const int MAXN = 20;
const int Z = 5;
const char key[] = "HTWSEN";

inline int opp(int d) {
    return d ^ 6;
}
inline int nxt(int d) {
    return (++d > Z ? d - 4 : d);
}

void solve(vi S) {
    vi s = S;
    s.insert(s.begin() + 1, 0);
    bool tlcorner = s[2] == -2 && s[5] == -2,
         brcorner = s[3] == -2 && s[4] == -2;
    int d = s[0];
    if (d == 0) {
        if (brcorner) {
            set_instruction(S, 4, key[0]);
            return;
        }
        int nd = -1;
        REP (k, 2, 6) {
            if (opp(s[k]) == k) {
                set_instruction(S, k, key[k]);
                return;
            }
            if (s[k] == 0 && nd == -1) {
                nd = k;
            }
        }
        if (tlcorner && nd != -1) {
            set_instruction(S, nd, key[nd]);
        }
        return;
    } else if (opp(s[d]) == d) {
        while (d = nxt(d)) {
            if (opp(s[d]) == d || s[d] == 0) {
                set_instruction(S, d, key[d]);
                return;
            }
        }
    } else {
        int cnt1 = 0;
        REP (k, 2, 6) {
            if (opp(s[k]) == k) {
                set_instruction(S, d, key[k]);
                return;
            }
            cnt1 += s[k] == 1;
        }
        set_instruction(S, tlcorner || cnt1, key[brcorner ? 1 : d]);
    }
}

void program_pulibot() {
    REP (_m, 0, Z + 1) {
        REP (_w, -2, Z + 1) {
            REP (_s, -2, Z + 1) {
                REP (_e, -2, Z + 1) {
                    REP (_n, -2, Z + 1) {
                        solve({_m, _w, _s, _e, _n});
                    }
                }
            }
        }
    }
}

Compilation message (stderr)

robot.cpp: In function 'void solve(vi)':
robot.cpp:76:18: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   76 |         while (d = nxt(d)) {
      |                ~~^~~~~~~~

• Subtask 0: 0 / 0
• Subtask 1: 6 / 6
• Subtask 2: 10 / 10
• Subtask 3: 18 / 18
• Subtask 4: 20 / 20
• Subtask 5: 46 / 46