Submission #848190

#	Time	Username	Problem	Language	Result	Execution time	Memory
848190		I_love_Hoang_Yen	Robot Contest (IOI23_robot)	C++17	88 / 100	128 ms	7256 KiB

robot

#include "robot.h"
#include <bits/stdc++.h>
using namespace std;
 
#define FOR(i,a,b) for(int i=(a),_##i##_b=(b); i<=_##i##_b; i++)
#define SET(color, action) { set_instruction(state, color, action); continue; }
 
void subtask3() {
    const int MAX_COLOR = 9;
 
    const int BOUNDARY = -2;
    const int BLOCKED = -1;
 
    const int FINAL = 1;

    // directions
    const int ONE_SOUTH = 2;
    const int ONE_EAST = 3;
    const int ONE_NORTH = 4;
    const int ONE_WEST = 5;

    // phase 2
    const int TWO_SOUTH = 6;
    const int TWO_EAST = 7;
    const int TWO_NORTH = 8;
    const int TWO_WEST = 9;

    FOR(cur,0,MAX_COLOR) FOR(west,-2,MAX_COLOR) FOR(south,-2,MAX_COLOR) FOR(east,-2,MAX_COLOR) FOR(north,-2,MAX_COLOR) {
        vector<int> state {cur, west, south, east, north};
        // Phase 3
        if (cur == FINAL) {
            if (south == BOUNDARY && east == BOUNDARY) SET(FINAL, 'T');
            if (north >= 6) SET(FINAL, 'N');
            if (south >= 6) SET(FINAL, 'S');
            if (east >= 6) SET(FINAL, 'E');
            if (west >= 6) SET(FINAL, 'W');
        }

        // Phase 2
        if (north >= 6 || south >= 6 || east >= 6 || west >= 6 || cur >= 6) {
            if (west == ONE_EAST) SET(cur >= 6 ? cur : cur + 4, 'W');
            if (south == ONE_NORTH) SET(cur >= 6 ? cur : cur + 4, 'S');
            if (east == ONE_WEST) SET(cur >= 6 ? cur : cur + 4, 'E');
            if (north == ONE_SOUTH) SET(cur >= 6 ? cur : cur + 4, 'N');

            if (north == BOUNDARY && west == BOUNDARY) SET(FINAL, 'H');
            if (north == FINAL || south == FINAL || east == FINAL || west == FINAL) SET(FINAL, 'H');

            if (cur == ONE_SOUTH || cur == TWO_SOUTH) SET(0, 'S');
            if (cur == ONE_NORTH || cur == TWO_NORTH) SET(0, 'N');
            if (cur == ONE_WEST || cur == TWO_WEST) SET(0, 'W');
            if (cur == ONE_EAST || cur == TWO_EAST) SET(0, 'E');
        }

        // Reached final state
        if (south == BOUNDARY && east == BOUNDARY) {
            SET(6, 'H');
        }

        // Starting state
        if (cur == 0 && north == BOUNDARY && west == BOUNDARY) {
            if (south == 0) SET(ONE_SOUTH, 'S');
            if (east == 0) SET(ONE_EAST, 'E');
        }

        // BFS
        if (cur == ONE_SOUTH) {
            if (east == 0 || east == ONE_WEST) SET(ONE_EAST, 'E');
            if (north == 0 || north == ONE_SOUTH) SET(ONE_NORTH, 'N');
            if (west == 0 || west == ONE_EAST) SET(ONE_WEST, 'W');
            if (south == 0 || south == ONE_NORTH) SET(ONE_SOUTH, 'S');
        }
        if (cur == ONE_EAST) {
            if (north == 0 || north == ONE_SOUTH) SET(ONE_NORTH, 'N');
            if (west == 0 || west == ONE_EAST) SET(ONE_WEST, 'W');
            if (south == 0 || south == ONE_NORTH) SET(ONE_SOUTH, 'S');
            if (east == 0 || east == ONE_WEST) SET(ONE_EAST, 'E');
        }
        if (cur == ONE_NORTH) {
            if (west == 0 || west == ONE_EAST) SET(ONE_WEST, 'W');
            if (south == 0 || south == ONE_NORTH) SET(ONE_SOUTH, 'S');
            if (east == 0 || east == ONE_WEST) SET(ONE_EAST, 'E');
            if (north == 0 || north == ONE_SOUTH) SET(ONE_NORTH, 'N');
        }
        if (cur == ONE_WEST) {
            if (south == 0 || south == ONE_NORTH) SET(ONE_SOUTH, 'S');
            if (east == 0 || east == ONE_WEST) SET(ONE_EAST, 'E');
            if (north == 0 || north == ONE_SOUTH) SET(ONE_NORTH, 'N');
            if (west == 0 || west == ONE_EAST) SET(ONE_WEST, 'W');
        }
        if (cur == 0) {
            if (north == ONE_SOUTH) SET(ONE_NORTH, 'N');
            if (south == ONE_NORTH) SET(ONE_SOUTH, 'S');
            if (east == ONE_WEST) SET(ONE_EAST, 'E');
            if (west == ONE_EAST) SET(ONE_WEST, 'W');
        }
    }
}
 
void program_pulibot() {
    subtask3();
}

Compilation message (stderr)

robot.cpp: In function 'void subtask3()':
robot.cpp:12:15: warning: unused variable 'BLOCKED' [-Wunused-variable]
   12 |     const int BLOCKED = -1;
      |               ^~~~~~~

• Subtask 0: 0 / 0
• Subtask 1: 6 / 6
• Subtask 2: 10 / 10
• Subtask 3: 18 / 18
• Subtask 4: 20 / 20
• Subtask 5: 34.0000000008 / 46