Submission #28130

#	Time	Username	Problem	Language	Result	Execution time	Memory
28130		(#71)	The Ant and The Bitcoin (FXCUP2_ant)	C++11	1 / 1	56 ms	3072 KiB

ant

#include <cstdio>
#include <utility>
#include <algorithm>
using namespace std;

struct ant{
  int i, x, d;
  bool operator< (const ant& rhs) const {
    return x < rhs.x;
  }
};

ant p[100010];
pair<int, int> s[100010];

int main(){
  int N, L, T; scanf("%d%d%d", &N, &L, &T);

  for(int i = 1; i <= N; i++){
    char c; scanf("%d %c", &p[i].x, &c);
    p[i].i = i; p[i].d = (c == 'L' ? -1 : 1);
  }

  int I; scanf("%d", &I);

  for(int i = 1; i <= N; i++){
    int r = p[i].x + p[i].d * T;
    r %= 2 * L; if(r < 0) r += 2 * L;
    if(r > L) r = 2 * L - r;

    s[i].first = r; s[i].second = i;
  }

  sort(s + 1, s + N + 1);
  sort(p + 1, p + N + 1);

  for(int i = 1; i <= N; i++){
    if(s[i].second == I){ printf("%d\n", p[i].i); break; }
  }
  return 0;
}

Compilation message (stderr)

ant.cpp: In function 'int main()':
ant.cpp:17:43: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   int N, L, T; scanf("%d%d%d", &N, &L, &T);
                                           ^
ant.cpp:20:40: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     char c; scanf("%d %c", &p[i].x, &c);
                                        ^
ant.cpp:24:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   int I; scanf("%d", &I);
                         ^

• Subtask 1: 1 / 1