/tmp/compiler_psxz3n66/src:7:11: 错误：expected ‘,’ or ‘;’ before ‘{’ token

7 | int chk(i){
| ^

#include <bits/stdc++.h>

using namespace std;

int i;

int chk(i){
    
    if ( i % 4 != 0) {
        return 0;
    } else if ( i % 100 == 0 ) {
	    if ( i % 400 == 0 ) {
	        return 1;
	    } else {
	    return 0;
	    }
    } else {
        return 1;
    }
    
}

int main(){
    
    int t;
    int a, b;
    cin >> a >> b;
    if ( b == 2 ) {
        t = chk(a);
        if ( t = 1 ) {
            cout << "29" << endl;
        } else { 
            cout << "28" << endl;
        }
    } else {
        if ( b == 1 or b == 3 or b == 5 or b == 7 or b == 8 or b == 10 or b == 12 ) {
            cout << "31" << endl;
        } else {
            cout << "30" << endl;
        }
    }
    
    
 return 0;
}