Submission #479864

#	Time	Username	Problem	Language	Result	Execution time	Memory
479864		ntabc05101	Boxes with souvenirs (IOI15_boxes)	C++14	Compilation error	0 ms	0 KiB

boxes

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

#define taskname "CAKES"

const int mxN = 1000000;

int main() {
  if (fopen(taskname".inp", "r")) {
    freopen(taskname".inp", "r", stdin);
    freopen(taskname".out", "w", stdout);
  }

  cin.tie(0)->sync_with_stdio(0);

  int n, k, l; cin >> n >> k >> l;
  vector<int> p;
  for (int i = 0, x; i < n; i++) {
    cin >> x;
    if (x != 0) {
      p.push_back(x);
    }
  }
  n = p.size();
  
  //return 0;

  vector<long long> dp_cw(n), dp_ccw(n);
  for (int i = 0; i < n; i++) {
    if (i < k) {
      dp_cw[i] = min(l, 2 * p[i]);
    }
    else {
      dp_cw[i] = min(l, 2 * p[i]) + dp_cw[i - k];
    }
  }
  for (int i = n - 1; i >= 0; i--) {
    if (i >= n - k) {
      dp_ccw[i] = min(l, 2 * (l - p[i]));
    }
    else {
      dp_ccw[i] = min(l, 2 * (l - p[i])) + dp_ccw[i + k];
    }
  }
  
  long long res = min(dp_cw[n - 1], dp_ccw[0]);
  for (int i = 1; i < n; i++) {
    res = min(res, dp_cw[i - 1] + dp_ccw[i]);
  }
  cout << res << "\n";
	
	return 0;		
}

Compilation message (stderr)

boxes.cpp: In function 'int main()':
boxes.cpp:24:13: warning: conversion from 'std::vector<int>::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
   24 |   n = p.size();
      |       ~~~~~~^~
boxes.cpp:10:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |     freopen(taskname".inp", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
boxes.cpp:11:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |     freopen(taskname".out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/ccxQ9jBc.o: in function `main':
grader.c:(.text.startup+0x0): multiple definition of `main'; /tmp/cclmWkfd.o:boxes.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/ccxQ9jBc.o: in function `main':
grader.c:(.text.startup+0x1ef): undefined reference to `delivery(int, int, int, int*)'
collect2: error: ld returned 1 exit status