Submission #990766

#	Time	Username	Problem	Language	Result	Execution time	Memory
990766		aryan12	Alice, Bob, and Circuit (APIO23_abc)	C++17	12 / 100	108 ms	10204 KiB

abc

#include "abc.h"
#include <bits/stdc++.h>
using namespace std;

// you may find the definitions useful
const int OP_ZERO    = 0;  // f(OP_ZERO,    x0, x1) = 0
const int OP_NOR     = 1;  // f(OP_NOR,     x0, x1) = !(x0 || x1)
const int OP_GREATER = 2;  // f(OP_GREATER, x0, x1) = (x0 > x1)
const int OP_NOT_X1  = 3;  // f(OP_NOT_X1,  x0, x1) = !x1
const int OP_LESS    = 4;  // f(OP_LESS,    x0, x1) = (x0 < x1)
const int OP_NOT_X0  = 5;  // f(OP_NOT_X0,  x0, x1) = !x0
const int OP_XOR     = 6;  // f(OP_XOR,     x0, x1) = (x0 ^ x1)
const int OP_NAND    = 7;  // f(OP_NAND,    x0, x1) = !(x0 && x1)
const int OP_AND     = 8;  // f(OP_AND,     x0, x1) = (x0 && x1)
const int OP_EQUAL   = 9;  // f(OP_EQUAL,   x0, x1) = (x0 == x1)
const int OP_X0      = 10; // f(OP_X0,      x0, x1) = x0
const int OP_GEQ     = 11; // f(OP_GEQ,     x0, x1) = (x0 >= x1)
const int OP_X1      = 12; // f(OP_X1,      x0, x1) = x1
const int OP_LEQ     = 13; // f(OP_LEQ,     x0, x1) = (x0 <= x1)
const int OP_OR      = 14; // f(OP_OR,      x0, x1) = (x0 || x1)
const int OP_ONE     = 15; // f(OP_ONE,     x0, x1) = 1


// Alice
int // returns la
alice(
    /*  in */ const int n,
    /*  in */ const char names[][5],
    /*  in */ const unsigned short numbers[],
    /* out */ bool outputs_alice[]
) {
    // outputs_alice[0] = 1;
    // outputs_alice[1] = 0;
    // return 2;
    for(int i = 0; i < 16; i++) {
        outputs_alice[i] = ((1 << i) & numbers[0]) >> i;
    }
    return 16;
}


// Bob
int // returns lb
bob(
    /*  in */ const int m,
    /*  in */ const char senders[][5],
    /*  in */ const char recipients[][5],
    /* out */ bool outputs_bob[]
) {
    // outputs_bob[0] = 1;
    // outputs_bob[1] = 1;
    // outputs_bob[2] = 0;
    // return 3;
    for(int i = 9; i >= 0; i--) {
        outputs_bob[i] = ((1 << i) & m) >> i;
    }
    return 10;
}


// Circuit
int // returns l
circuit(
    /*  in */ const int la,
    /*  in */ const int lb,
    /* out */ int operations[],
    /* out */ int operands[][2],
    /* out */ int outputs_circuit[][16]
) {
    // operations[5] = 8;
    // operations[6] = 14;
    // operands[5][0] = 0; operands[5][1] = 4;
    // operands[6][0] = 2; operands[6][1] = 5;
    // int final_results[] = {20000, 0, 24464};
    // for(int i = 0; i < 3; ++i)
    //     for(int j = 0; j < 16; ++j)
    //         outputs_circuit[i][j] = 5 + (final_results[i] >> j & 1);
    // return 7;

    /*
    full adder:
    - carry bit
    - previous answer stored where?
    - m

    prev_ans[i] = prev_ans[i] XOR prev_ans[i - offset] XOR carry
    carry = (prev_ans[i] * prev_ans[i - offset]) + carry(prev_ans[i] + prev_ans[i - offset])
    */

    int cnt = la + lb;

    vector<int> prev_ans(16);
    for(int i = cnt; i < cnt + 16; i++) {
        operations[i] = OP_ZERO;
        operands[i][0] = 0;
        operands[i][1] = 0;
        prev_ans[i - cnt] = i;
    }
    cnt += 16;

    int carry = cnt;
    operations[cnt] = OP_ZERO;
    operands[cnt][0] = 0;
    operands[cnt][1] = 0;
    cnt += 1;
    
    for(int i = la; i < la + lb; i++) {
        int offset = i - la;
        vector<int> answers_this_time(16);
        for(int j = 0; j < 16; j++) {
            if(offset > j) {
                operations[cnt] = OP_X0;
                operands[cnt][0] = prev_ans[j];
                operands[cnt][1] = 0;
                answers_this_time[j] = cnt;
                cnt += 1;
            }
            else {
                operations[cnt] = OP_XOR;
                operands[cnt][0] = prev_ans[j];
                operands[cnt][1] = j - offset;
                cnt += 1;

                operations[cnt] = OP_XOR;
                operands[cnt][0] = carry;
                operands[cnt][1] = cnt - 1;
                answers_this_time[j] = cnt;
                cnt += 1;

                operations[cnt] = OP_OR;
                operands[cnt][0] = prev_ans[j];
                operands[cnt][1] = j - offset;
                cnt += 1;

                operations[cnt] = OP_AND;
                operands[cnt][0] = carry;
                operands[cnt][1] = cnt - 1;
                cnt += 1;

                operations[cnt] = OP_AND;
                operands[cnt][0] = prev_ans[j];
                operands[cnt][1] = j - offset;
                cnt += 1;

                operations[cnt] = OP_OR;
                operands[cnt][0] = cnt - 2;
                operands[cnt][1] = cnt - 1;
                carry = cnt;
                cnt += 1;
            }
        }
        for(int j = 0; j < 16; j++) {
            // if cur bit is 0, keep prev_ans
            // cout << "cnt = " << cnt << "\n";
            operations[cnt] = OP_GREATER;
            operands[cnt][0] = prev_ans[j];
            operands[cnt][1] = i;
            cnt += 1;

            // if cur bit is 1, keep new ans
            operations[cnt] = OP_AND;
            operands[cnt][0] = answers_this_time[j];
            operands[cnt][1] = i;
            cnt += 1;

            operations[cnt] = OP_OR;
            operands[cnt][0] = cnt - 2;
            operands[cnt][1] = cnt - 1;
            prev_ans[j] = cnt;
            cnt += 1;
        }
        operations[cnt] = OP_ZERO;
        operands[cnt][0] = 0;
        operands[cnt][1] = 0;
        carry = cnt;
        cnt += 1;
        // cout << "iteration: " << i - la << "\n";
        // for(int j = 0; j < 16; j++) {
        //     cout << "jth bit stored: " << prev_ans[j] << "\n";
        // }
    }
    for(int j = 0; j < 16; j++) {
        outputs_circuit[0][j] = prev_ans[j];
    }
    return cnt;
}

• Subtask 1: 4 / 4
• Subtask 2: 4 / 4
• Subtask 3: 4 / 4
• Subtask 4: 0 / 24
• Subtask 5: 0 / 24
• Subtask 6: 0 / 6
• Subtask 7: 0 / 18
• Subtask 8: 0 / 10
• Subtask 9: 0 / 6