boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:25:18: warning: conversion to 'int' from 'std::vector<long long int>::size_type {aka long unsigned int}' may alter its value [-Wconversion]
int lsz = l.size();
~~~~~~^~
boxes.cpp:26:18: warning: conversion to 'int' from 'std::vector<long long int>::size_type {aka long unsigned int}' may alter its value [-Wconversion]
int rsz = r.size();
~~~~~~^~
boxes.cpp:33:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
ans = min(ans, (i < l.size() ? l[l.size() - 1 - i] : 0) + ((k-i) < r.size() ? r[r.size() - 1 - (k-i)] : 0) + L);
~~^~~~~~~~~~
boxes.cpp:33:68: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
ans = min(ans, (i < l.size() ? l[l.size() - 1 - i] : 0) + ((k-i) < r.size() ? r[r.size() - 1 - (k-i)] : 0) + L);
~~~~~~^~~~~~~~~~