Submission #28096

#	Time	Username	Problem	Language	Result	Execution time	Memory
28096		EyeOfSol (#71)	The Ant and The Bitcoin (FXCUP2_ant)	C++11	1 / 1	49 ms	3656 KiB

ant

#include <bits/stdc++.h>

using namespace std;

int n, l, t;

int mokx(int a, int b) {
	if (a>=0) return a/b;
	return (a-b+1)/b;
}

int loc(int a, int dir, int t) {
	int v = a+t*dir;
	if (mokx(v,l)%2) return l-(v%l+l)%l;
	return (v%l+l)%l;
}

int arr[100100], ord[100100];
vector<int> vec;

int main() {
	int i;
	scanf("%d%d%d",&n,&l,&t);
	for (i=0;i<n;i++) {
		char ch;
		ord[i] = i;
		scanf("%d %c",&arr[i],&ch);
		if (ch=='L') vec.push_back(loc(arr[i],-1,t));
		else vec.push_back(loc(arr[i],1,t));
	}
	sort(ord,ord+n,[](int a, int b){return arr[a]<arr[b];});
	int id;
	scanf("%d",&id); id--;
	int v = vec[id];
	sort(vec.begin(),vec.end());
	for (i=0;i<vec.size();i++) {
		if (vec[i]==v) printf("%d\n",ord[i]+1);
	}

    return 0;
}

Compilation message (stderr)

ant.cpp: In function 'int main()':
ant.cpp:36:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (i=0;i<vec.size();i++) {
            ^
ant.cpp:23:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d",&n,&l,&t);
                          ^
ant.cpp:27:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %c",&arr[i],&ch);
                             ^
ant.cpp:33:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&id); id--;
                 ^

• Subtask 1: 1 / 1