AtCoder Petrozavodsk Contest 001

Submission #2055993

Source codeソースコード

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

#ifdef DEBUG
#define NDEBUG
#include "cout11.h"
#endif
#undef NDEBUG
#include <cassert>

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> ii;
typedef pair<ll,ll> llll;
typedef pair<double,double> dd;

typedef vector<int> vi;
typedef vector<vector<int>> vvi;
typedef vector<ii> vii;
typedef vector<vector<ii>> vvii;
typedef vector<ll> vll;

#define sz(a)  int((a).size())
#define pb  push_back
#define FOR(var,from,to) for(int var=(from);var<=(to);++var)
#define rep(var,n)  for(int var=0;var<(n);++var)
#define rep1(var,n)  for(int var=1;var<=(n);++var)
#define repC2(vari,varj,n)  for(int vari=0;vari<(n)-1;++vari)for(int varj=vari+1;varj<(n);++varj)
#define ALL(c)  (c).begin(),(c).end()
#define RALL(c)  (c).rbegin(),(c).rend()
#define tr(i,c)  for(auto i=(c).begin(); i!=(c).end(); ++i)
#define found(s,e)  ((s).find(e)!=(s).end())
#define mset(arr,val)  memset(arr,val,sizeof(arr))
#define mid(x,y) ((x)+((y)-(x))/2)
#define IN(x,a,b) ((a)<=(x)&&(x)<=(b))

#define VACANT 'V'
#define MALE   'M'
#define FEMALE 'F'

char buf[256];

int query(int i) {
    printf("%d\n", i);
    fflush(stdout);

    fgets(buf, 255, stdin);
    return (int)buf[0];
}

bool sync(int x, int y, int ax, int ay) {
    if ((x - y) % 2 == 0) {
        return ax == ay;
    } else {
        return ax != ay;
    }
}

int main() {
    fgets(buf, 255, stdin);
    int N = atoi(buf);

    int al = query(0);
    if (al == VACANT) return 0;

    int l=0, h=N;
    int ah = al;

    rep(i, 16) {
        int m = (l+h)/2;
        int am = query(m);
        if (am == VACANT) return 0;

        if (sync(l,m, al,am)) {
            l = m; al = am;
        } else {
            h = m; ah = am;
        }
    }
    for (int m=l+1; m<h; ++m) {
        int am = query(m);
        if (am == VACANT) return 0;
    }

    return 0;
}

Submission

Task問題 C - Vacant Seat
User nameユーザ名 naoya_t
Created time投稿日時
Language言語 C++14 (GCC 5.4.1)
Status状態 AC
Score得点 500
Source lengthソースコード長 1958 Byte
File nameファイル名
Exec time実行時間 6 ms
Memory usageメモリ使用量 852 KB

Compiler messageコンパイルメッセージ

./Main.cpp: In function ‘int query(int)’:
./Main.cpp:47:27: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result]
fgets(buf, 255, stdin);
^
./Main.cpp: In function ‘int main()’:
./Main.cpp:60:27: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result]
fgets(buf, 255, stdin);
^

Test case

Set

Set name Score得点 / Max score Cases
Sample - 0_00.txt
All 500 / 500 0_00.txt,1_00.txt,1_01.txt,1_02.txt,1_03.txt,1_04.txt,1_05.txt,1_06.txt,1_07.txt,1_08.txt,1_09.txt,1_10.txt,1_11.txt,1_12.txt,1_13.txt,1_14.txt,1_15.txt,1_16.txt,1_17.txt,1_18.txt,1_19.txt,1_20.txt,1_21.txt,1_22.txt,1_23.txt,1_24.txt,1_25.txt,1_26.txt,1_27.txt,1_28.txt,1_29.txt,1_30.txt,1_31.txt,1_32.txt,1_33.txt,1_34.txt,1_35.txt,1_36.txt,1_37.txt,1_38.txt,1_39.txt,1_40.txt,1_41.txt,1_42.txt,1_43.txt,1_44.txt,1_45.txt,1_46.txt,1_47.txt,1_48.txt

Test case

Case name Status状態 Exec time実行時間 Memory usageメモリ使用量
0_00.txt AC 3 ms 588 KB
1_00.txt AC 3 ms 588 KB
1_01.txt AC 3 ms 596 KB
1_02.txt AC 3 ms 592 KB
1_03.txt AC 3 ms 592 KB
1_04.txt AC 3 ms 592 KB
1_05.txt AC 3 ms 592 KB
1_06.txt AC 3 ms 596 KB
1_07.txt AC 3 ms 592 KB
1_08.txt AC 3 ms 592 KB
1_09.txt AC 3 ms 588 KB
1_10.txt AC 3 ms 592 KB
1_11.txt AC 3 ms 596 KB
1_12.txt AC 3 ms 592 KB
1_13.txt AC 5 ms 848 KB
1_14.txt AC 5 ms 852 KB
1_15.txt AC 5 ms 848 KB
1_16.txt AC 6 ms 852 KB
1_17.txt AC 6 ms 848 KB
1_18.txt AC 5 ms 848 KB
1_19.txt AC 6 ms 848 KB
1_20.txt AC 6 ms 848 KB
1_21.txt AC 6 ms 848 KB
1_22.txt AC 5 ms 848 KB
1_23.txt AC 6 ms 852 KB
1_24.txt AC 6 ms 844 KB
1_25.txt AC 5 ms 844 KB
1_26.txt AC 6 ms 848 KB
1_27.txt AC 6 ms 848 KB
1_28.txt AC 6 ms 852 KB
1_29.txt AC 5 ms 844 KB
1_30.txt AC 5 ms 852 KB
1_31.txt AC 5 ms 848 KB
1_32.txt AC 6 ms 852 KB
1_33.txt AC 6 ms 848 KB
1_34.txt AC 6 ms 844 KB
1_35.txt AC 6 ms 848 KB
1_36.txt AC 5 ms 852 KB
1_37.txt AC 6 ms 852 KB
1_38.txt AC 6 ms 848 KB
1_39.txt AC 6 ms 852 KB
1_40.txt AC 6 ms 848 KB
1_41.txt AC 6 ms 848 KB
1_42.txt AC 6 ms 852 KB
1_43.txt AC 6 ms 848 KB
1_44.txt AC 6 ms 848 KB
1_45.txt AC 6 ms 848 KB
1_46.txt AC 6 ms 844 KB
1_47.txt AC 6 ms 848 KB
1_48.txt AC 6 ms 848 KB