82 lines
1.7 KiB
C++
82 lines
1.7 KiB
C++
#include <iostream>
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#include <fstream>
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#include <sstream>
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#include <string>
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#include <vector>
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std::vector<int> tokenise( std::string input )
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{
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std::stringstream ssInput( input );
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std::vector<int> stream;
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std::string s;
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while( std::getline( ssInput, s, ',' ) )
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{
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stream.push_back( std::stoi( s ) );
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}
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return stream;
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}
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enum Opcodes
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{
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Add = 1,
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Multiply = 2,
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End = 99
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};
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int main(int argc, char** argv)
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{
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std::ifstream infile( argv[1] );
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std::string input;
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std::getline( infile, input );
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std::vector<int> program;
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for ( int noun = 0; noun < 100; noun++ )
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for ( int verb = 0; verb < 100; verb++ )
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{
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program = tokenise( input );
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// Noun
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program[1] = noun;
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// Verb
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program[2] = verb;
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for ( int i = 0; i < program.size(); i += 4 )
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{
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int opcode = program[i];
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int operandA = program[program[i + 1]];
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int operandB = program[program[i + 2]];
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int resLoc = program[i + 3];
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if ( opcode == Add )
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program[resLoc] = operandA + operandB;
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else if ( opcode == Multiply )
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program[resLoc] = operandA * operandB;
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else if ( opcode == End )
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break;
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}
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if ( program[0] == 19690720 )
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{
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std::cout << "Solution found : " << noun << " " << verb << std::endl;
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std::cout << "Solution answer : " << 100 * noun + verb << std::endl;
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}
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}
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std::cout << std::endl << "Program end state : ";
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for ( auto& i : program )
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std::cout << i << " ";
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std::cout << std::endl;
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}
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