travel.cpp: In function 'void solve()':
travel.cpp:31:16: warning: unused variable 'j' [-Wunused-variable]
31 | ll q , i , j , m , n , z , s = 0, f, l , r , k , x , y , mn = 1e18 , mx = 0;
| ^
travel.cpp:31:28: warning: unused variable 'z' [-Wunused-variable]
31 | ll q , i , j , m , n , z , s = 0, f, l , r , k , x , y , mn = 1e18 , mx = 0;
| ^
travel.cpp:31:40: warning: unused variable 'f' [-Wunused-variable]
31 | ll q , i , j , m , n , z , s = 0, f, l , r , k , x , y , mn = 1e18 , mx = 0;
| ^
travel.cpp:31:59: warning: unused variable 'y' [-Wunused-variable]
31 | ll q , i , j , m , n , z , s = 0, f, l , r , k , x , y , mn = 1e18 , mx = 0;
| ^
travel.cpp:31:63: warning: unused variable 'mn' [-Wunused-variable]
31 | ll q , i , j , m , n , z , s = 0, f, l , r , k , x , y , mn = 1e18 , mx = 0;
| ^~
travel.cpp:31:76: warning: unused variable 'mx' [-Wunused-variable]
31 | ll q , i , j , m , n , z , s = 0, f, l , r , k , x , y , mn = 1e18 , mx = 0;
| ^~
travel.cpp: In function 'int main()':
travel.cpp:91:13: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
91 | freopen("input.txt", "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
travel.cpp:92:13: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
92 | freopen("output.txt", "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~