boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:17:29: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
17 | if (leftt.size()==K)
| ~~~~~~~~~~~~^~~
boxes.cpp:20:25: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
20 | if (leftt.size()!=K)
| ~~~~~~~~~~~~^~~
boxes.cpp:31:30: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
31 | if (rightt.size()==K)
| ~~~~~~~~~~~~~^~~
boxes.cpp:34:26: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
34 | if (rightt.size()!=K)
| ~~~~~~~~~~~~~^~~
boxes.cpp:47:28: warning: conversion from 'std::vector<int>::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
47 | int lastt=rightt.size()-1;
| ~~~~~~~~~~~~~^~
boxes.cpp:50:23: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
50 | if (cur.size()==K)
| ~~~~~~~~~~^~~
boxes.cpp:56:23: warning: conversion from 'std::vector<int>::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
56 | lastt=leftt.size()-1;
| ~~~~~~~~~~~~^~
boxes.cpp:59:23: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
59 | if (cur.size()==K)
| ~~~~~~~~~~^~~