test flee or fight

allDead = ()=>{
    for(ennemyHealth of ennemiesHealths)
    {
        if(ennemyHealth != 0)
            return false
    }
    return true
}
ennemiesHealths = []
ennemiesDammages = []
var inputs = readline().split(' ');
const h = parseInt(inputs[0]);
const d = parseInt(inputs[1]);
const n = parseInt(readline());
for (let i = 0; i < n; i++) {
    var inputs = readline().split(' ');
    const eh = parseInt(inputs[0]);
    const ed = parseInt(inputs[1]);
    ennemiesHealths.push(eh);
    ennemiesDammages.push(ed);
}

console.log(allDead());