sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:45:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |   for(int i=0;i<v.size();i++)
      |               ~^~~~~~~~~
sorting.cpp:5:15: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
    5 |     #define F first
sorting.cpp:47:15: note: in expansion of macro 'F'
   47 |     P[i]=v[i].F;
      |               ^
sorting.cpp:6:15: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
    6 |     #define S second
sorting.cpp:48:15: note: in expansion of macro 'S'
   48 |     Q[i]=v[i].S;
      |               ^
sorting.cpp:54:19: warning: conversion from 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
   54 |      return v.size();
      |             ~~~~~~^~
sorting.cpp:14:9: warning: variable 'pos' set but not used [-Wunused-but-set-variable]
   14 |      ll pos[N];
      |         ^~~
sorting.cpp:12:43: warning: unused parameter 'M' [-Wunused-parameter]
   12 |     int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
      |                                       ~~~~^
sorting.cpp:12:50: warning: unused parameter 'X' [-Wunused-parameter]
   12 |     int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
      |                                              ~~~~^~~
sorting.cpp:12:59: warning: unused parameter 'Y' [-Wunused-parameter]
   12 |     int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
      |                                                       ~~~~^~~