// WITH_RUNTIME
// INTENTION_TEXT: "Replace with 'mapIndexed{}.sum()'"
// INTENTION_TEXT_2: "Replace with 'asSequence().mapIndexed{}.sum()'"
fun foo(list: List<Int>): Int {
    val <caret>s = list
        .asSequence()
        .mapIndexed { index, item -> item * index }
        .sum()
    return s
}