traffic.cpp:1:19: error: 'vector' has not been declared
1 | int centre(int n, vector<int> p, vector<int> s, vector<int> d) {
| ^~~~~~
traffic.cpp:1:25: error: expected ',' or '...' before '<' token
1 | int centre(int n, vector<int> p, vector<int> s, vector<int> d) {
| ^
traffic.cpp: In function 'int centre(int, int)':
traffic.cpp:3:17: error: 'p' was not declared in this scope
3 | for (int i: p) {
| ^
traffic.cpp:8:23: warning: left operand of comma operator has no effect [-Wunused-value]
8 | for (int i = 0; i < n, i++) {
| ~~^~~
traffic.cpp:8:31: error: expected ';' before ')' token
8 | for (int i = 0; i < n, i++) {
| ^
| ;