제출 #1002749

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1002749		Deepesson	MalnaRISC (COI21_malnarisc)	C++17	0 / 100	1 ms	348 KiB

malnarisc

#include <bits/stdc++.h>
typedef std::pair<int,int> pii;
int main()
{
    int n;
    std::cin>>n;
    int oldn=n;
    int truenum=2;
    while(truenum<n){
        truenum*=2;
    }
    n=truenum;
    std::vector<std::vector<pii>> ans;
    for (int k = 2; k <= n; k *= 2){ // k is doubled every iteration
        for (int j = k/2; j > 0; j /= 2){ // j is halved at every iteration, with truncation of fractional parts
            std::vector<pii> tp;
            for (int i = 0; i < n; i++){
                int l = i ^ j;
                if (l > i)
                    if ( (i&k == 0)){
                        if(std::max(l+1,i+1)<=oldn)
                        tp.push_back({l+1,i+1});
                    }else {
                        if(std::max(l+1,i+1)<=oldn)
                        tp.push_back({i+1,l+1});

                    }
            }
            if(tp.size()){
                ans.push_back(tp);
            }
        }
    }
    std::cout<<ans.size()<<"\n";
    for(auto&x:ans){
        for(auto&y:x)std::cout<<"CMPSWP R"<<y.first<<" R"<<y.second<<" ";
        std::cout<<"\n";
    }
}

컴파일 시 표준 에러 (stderr) 메시지

malnarisc.cpp: In function 'int main()':
malnarisc.cpp:20:31: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
   20 |                     if ( (i&k == 0)){
      |                             ~~^~~~
malnarisc.cpp:19:20: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else]
   19 |                 if (l > i)
      |                    ^

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